Exhibit 1.1

SOUTHWEST GAS CORPORATION

$450,000,000 2.200% Senior Notes due 2030

UNDERWRITING AGREEMENT

June 1, 2020

KEYBANC CAPITAL MARKETS INC.

MUFG SECURITIES AMERICAS INC.

TD SECURITIES (USA) LLC

U.S. BANCORP INVESTMENTS, INC.

As Representatives of

the several Underwriters listed in

Schedule 1 hereto

c/o KeyBanc Capital Markets Inc.

127 Public Square, 4th Floor

Cleveland, OH 44114

c/o MUFG Securities Americas Inc.

1221 Avenue of the Americas, 6th Floor

New York, NY 10020-1001

c/o TD Securities (USA) LLC

31 W. 52nd Street, 2nd Floor

New York, NY 10019

c/o U.S. Bancorp Investments, Inc.

214 N. Tryon St., 26th Floor

Charlotte, NC 28202

Ladies and Gentlemen:

Southwest Gas Corporation, a California corporation (the “Company”), proposes to issue and sell to the several underwriters (the “Underwriters”) named in Schedule 1 attached to this agreement (this “Agreement”), acting severally and not jointly, the respective amounts set forth in such Schedule 1 of $450,000,000 aggregate principal amount of its 2.200% Senior Notes due 2030 (the “Securities”). The Securities will be issued pursuant to an Indenture to be dated as of June 4, 2020 (the “Base Indenture”), and a supplemental indenture to be dated as of June 4, 2020 (the “Supplemental Indenture” and together with the Base Indenture, the “Indenture”) between the Company and The Bank of New York Mellon Trust Company, N.A., as trustee (the “Trustee”). This is to confirm the agreement concerning the purchase of the Securities from the Company by the Underwriters.

1. Representations, Warranties and Agreements of the Company. The Company represents, warrants and agrees that:

(a) A Registration Statement (as defined below) on Form S-3 relating to the Securities (i) has been prepared by the Company in conformity with the requirements of the Securities Act of 1933, as amended (the “Securities Act”), and the rules and regulations (together, the “Rules and Regulations”) of the Securities and Exchange Commission (the “Commission”) thereunder; (ii) has been filed with the Commission under the Securities Act; and (iii) is effective under the Securities Act. Copies of such Registration Statement and any amendment thereto have been delivered by the Company to KeyBanc Capital Markets Inc., MUFG Securities Americas Inc., TD Securities (USA) LLC and U.S. Bancorp Investments, Inc., as the representatives (“you” or the “Representatives”) of the Underwriters. For the avoidance of doubt, the availability to the Underwriters of such Registration Statement and any amendment thereto on the Commission’s EDGAR database shall satisfy the Company’s delivery obligation with respect thereto. As used in this Agreement:

(i) “Applicable Time” means June 1, 2020 at 4:15 p.m. (New York City time);

(ii) “Effective Date” means any date as of which any part of such registration statement relating to the Securities became, or is deemed to have become, effective under the Securities Act in accordance with the Rules and Regulations;

(iii) “Issuer Free Writing Prospectus” means each “issuer free writing prospectus” (as defined in Rule 433(h) of the Rules and Regulations) prepared by or on behalf of the Company or used or referred to by the Company in connection with the offering of the Securities, including each “road show” (as defined in Rule 433(h) of the Rules and Regulations) relating to the offering of the Securities that is a “written communication” (as defined in Rule 405 under the Rules and Regulations);

(iv) “Preliminary Prospectus” means the preliminary prospectus supplement, dated June 1, 2020, specifically relating to the Securities, as filed with the Commission pursuant to Rule 424(b) of the Rules and Regulations (“Rule 424(b)”), together with the prospectus that is included in the Registration Statement at the time of its effectiveness and that omits Rule 430B Information (as defined below);

(v) “Pricing Disclosure Package” means, as of the Applicable Time, the Preliminary Prospectus, together with the information included in Schedule 2 hereto and each Issuer Free Writing Prospectus filed or used by the Company on or before the Applicable Time, other than any road show that is an Issuer Free Writing Prospectus;

(vi) “Prospectus” means the final prospectus supplement, dated June 1, 2020 relating to the Securities, as filed with the Commission pursuant to Rule 424(b), together with the prospectus that is included in the Registration Statement at the time of its effectiveness and that omits Rule 430B Information; and

(vii) “Registration Statement” means, collectively, the various parts of the shelf registration statement on Form S-3 relating to the Securities (File No. 333-222047-01), each as amended as of the Effective Date for such part, including the information, if any, deemed pursuant to Rule 430B under the Securities Act to be part of the registration statement at the time of its effectiveness and all exhibits to such registration statement (“Rule 430B Information”).

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Any reference to the Preliminary Prospectus or the Prospectus shall be deemed to refer to and include the documents incorporated by reference therein pursuant to Form S-3 under the Securities Act as of the date of the Preliminary Prospectus or the Prospectus, as the case may be; any reference to the Registration Statement shall be deemed to refer to and include the documents incorporated by reference therein pursuant to Form S-3 under the Securities Act as of the date of this Agreement; and all references to information that is “included” or “contained” in the Preliminary Prospectus, the Prospectus, the Registration Statement or the Pricing Disclosure Package (and any similar references) shall mean and include all information that is incorporated by reference therein pursuant to Form S-3 under the Securities Act. Any reference to any amendment or supplement to the Preliminary Prospectus or the Prospectus shall be deemed to refer to and include any document filed under the Securities Exchange Act of 1934, as amended (the “Exchange Act”), after the date of the Preliminary Prospectus or the Prospectus, as the case may be, and incorporated by reference in the Preliminary Prospectus or the Prospectus, as the case may be; and any reference to any amendment to the Registration Statement shall be deemed to refer to any document filed under the Exchange Act after the date of this Agreement that is incorporated by reference in the Registration Statement. The Commission has not issued any order preventing or suspending the use of the Preliminary Prospectus or the Prospectus or suspending the effectiveness of the Registration Statement, and no proceeding or examination for such purpose has been instituted or, to the Company’s knowledge, threatened by the Commission. The Commission has not notified the Company of any objection to the use of the form of the Registration Statement.

(b) Southwest Gas Holdings, Inc., a Delaware corporation (“Parent”), has been since the time of the initial filing of the Registration Statement and continues to be a “well-known seasoned issuer” (as defined in Rule 405 of the Rules and Regulations). The Company is an indirect wholly owned subsidiary of the Parent and is eligible to use Form S-3 for the offering of the Securities. Neither Parent nor the Company has been an “ineligible issuer” (as defined in Rule 405 of the Rules and Regulations) at any such time or date. The Company will pay the registration fee for this offering pursuant to Rule 456(b)(1) under the Securities Act within the time period required by such rule (without giving effect to the proviso therein) and in any event prior to the Closing Date. The Registration Statement is an “automatic shelf registration statement” (as defined in Rule 405 of the Rules and Regulations) and was filed not earlier than the date that is three years prior to the Closing Date (as defined in Section 4 hereof). No notice of objection of the Commission to the Registration Statement or any post-effective amendment thereto pursuant to Rule 401(g)(2) under the Securities Act has been received by the Parent or by the Company. No order suspending the effectiveness of the Registration Statement has been issued by the Commission, and no proceeding for that purpose or pursuant to Section 8A of the Securities Act against the Parent or the Company or related to the offering of the Securities has been initiated or threatened by the Commission.

(c) The Registration Statement conformed and will conform in all material respects on the Effective Date and on the Closing Date, and any amendment to the Registration Statement filed after the date hereof will conform in all material respects when filed, to the requirements of the Securities Act, the Rules and Regulations and the Trust Indenture Act of 1939, as amended, and the rules and regulations of the Commission thereunder (collectively, the “Trust

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Indenture Act”). The Prospectus will conform, in all material respects when filed with the Commission pursuant to Rule 424(b) and on the Closing Date to the requirements of the Securities Act and the Rules and Regulations. The documents incorporated by reference in the Preliminary Prospectus or the Prospectus conformed, and any further documents so incorporated will conform, when filed with the Commission, in all material respects to the requirements of the Exchange Act or the Securities Act, as applicable, and the rules and regulations of the Commission thereunder.

(d) The Registration Statement did not, as of the Effective Date, contain an untrue statement of a material fact or omit to state a material fact required to be stated therein or necessary to make the statements therein not misleading; provided that no representation or warranty is made as to information contained in or omitted from the Registration Statement in reliance upon and in conformity with (i) written information furnished to the Company through the Representatives by or on behalf of any Underwriters specifically for inclusion therein, which information is specified in Section 8(e) hereof and (ii) that part of the Registration Statement that constitutes the Statement of Eligibility and Qualification (the “Form T-1”) of the Trustee under the Trust Indenture Act.

(e) No order preventing or suspending the use of any Preliminary Prospectus has been issued by the Commission, and each Preliminary Prospectus included in the Pricing Disclosure Package, at the time of filing thereof, complied in all material respects with the Securities Act, and no Preliminary Prospectus, at the time of filing thereof, contained any untrue statement of a material fact or omitted to state a material fact necessary in order to make the statements therein, in the light of the circumstances under which they were made, not misleading; provided that no representation or warranty is made as to information contained in or omitted from the Preliminary Prospectus in reliance upon and in conformity with written information furnished to the Company through the Representatives by or on behalf of any Underwriters specifically for inclusion therein, which information is specified in Section 8(e) hereof.

(f) The Prospectus does not and will not, as of its date and on the Closing Date, contain an untrue statement of a material fact or omit to state a material fact required to be stated therein or necessary to make the statements therein, in the light of the circumstances under which they were made, not misleading; provided that no representation or warranty is made as to information contained in or omitted from the Prospectus in reliance upon and in conformity with written information furnished to the Company through the Representatives by or on behalf of any Underwriters specifically for inclusion therein, which information is specified in Section 8(e) hereof.

(g) The documents incorporated by reference in the Preliminary Prospectus or the Prospectus did not, and any further documents filed and incorporated by reference therein will not, when filed with the Commission, contain an untrue statement of a material fact or omit to state a material fact required to be stated therein or necessary to make the statements therein, in the light of the circumstances under which they were made, not misleading.

(h) The Pricing Disclosure Package did not, as of the Applicable Time, contain an untrue statement of a material fact or omit to state a material fact necessary to make the statements therein, in the light of the circumstances under which they were made, not misleading; provided that no representation or warranty is made as to information contained in or omitted from the Pricing Disclosure Package in reliance upon and in conformity with written information furnished to the Company through the Representatives by or on behalf of any Underwriters specifically for inclusion therein, which information is specified in Section 8(e) hereof.

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(i) Each Issuer Free Writing Prospectus (including, without limitation, any road show that is a free writing prospectus under Rule 433 of the Rules and Regulations), when considered together with the Pricing Disclosure Package as of the Applicable Time, did not contain an untrue statement of a material fact or omit to state a material fact required to be stated therein or necessary to make the statements therein, in the light of the circumstances under which they were made, not misleading; provided that no representation or warranty is made as to information contained in or omitted from any Issuer Free Writing Prospectus in reliance upon and in conformity with written information furnished to the Company through the Representatives by or on behalf of any Underwriters specifically for inclusion therein, which information is specified in Section 8(e) hereof.

(j) Each Issuer Free Writing Prospectus conformed or will conform in all material respects to the requirements of the Securities Act and the Rules and Regulations on the date of first use, and the Company has complied or will comply, as applicable, with any filing requirements applicable to such Issuer Free Writing Prospectus pursuant to the Rules and Regulations. The Company has not made any offer relating to the Securities that would constitute an Issuer Free Writing Prospectus without the prior written consent of the Representatives (such consent not to be unreasonably delayed or withheld). The Company has retained in accordance with the Rules and Regulations all Issuer Free Writing Prospectuses that were not required to be filed with the Commission pursuant to the Rules and Regulations. No Issuer Free Writing Prospectus conflicted with or will conflict with the information in the Registration Statement, the Preliminary Prospectus or the Prospectus.

(k) The Company (A) has been duly incorporated, organized or formed and is validly existing in good standing under the laws of the jurisdiction of its incorporation, organization or formation, with full power and authority to own, lease and operate its properties and conduct its business; and (B) is duly registered and qualified to do business and is in good standing in each jurisdiction in which the character of the business conducted by it or the location of the properties owned, leased or operated by it make such registration or qualification necessary, except, as it relates to this clause (B), for such jurisdictions where the failure to so register, qualify or to be in good standing would not, individually or in the aggregate, have a Material Adverse Effect (as defined below). Except for the subsidiaries listed on Schedule 3 hereto, the Company does not have any subsidiaries or control, directly or indirectly, any corporation, association or other entity. No subsidiary of the Company is a “significant subsidiary” (as defined in Rule 405 of the Rules and Regulations) and no two or more subsidiaries of the Company considered in the aggregate constitute a “significant subsidiary” (as defined in Rule 405 of the Rules and Regulations).

(l) The shares of issued and outstanding common stock of the Company, par value $1.00 per share (the “Common Stock”) have been duly authorized, validly issued, fully paid and non-assessable and were issued in compliance with federal and state securities laws.

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(m) The Indenture has been duly authorized by the Company and, upon effectiveness of the Registration Statement, was or will have been duly qualified under the Trust Indenture Act and, when duly executed and delivered in accordance with its terms by each of the parties thereto, will constitute a valid and legally binding agreement of the Company, enforceable against the Company in accordance with its terms, except as enforceability may be limited by applicable bankruptcy, insolvency, reorganization, moratorium, fraudulent conveyance, usury, stay, extension or other similar laws affecting the enforcement of creditors’ rights generally or by general equitable principles relating to enforceability (collectively, the “Enforceability Exceptions”).

(n) The Securities have been duly authorized by the Company and, when duly executed, authenticated, issued and delivered as provided in the Indenture and paid for as provided herein, will be duly and validly issued and outstanding and will constitute valid and legally binding obligations of the Company, entitled to the benefits of the Indenture and enforceable against the Company in accordance with their terms, subject to the Enforceability Exceptions.

(o) The Company has all requisite corporate power and authority to execute, deliver and perform its obligations under this Agreement, the Securities and the Indenture (collectively, the “Transaction Documents”). This Agreement has been duly authorized, executed and delivered by the Company.

(p) None of the execution, delivery and performance of the Transaction Documents by the Company, the issuance, sale and delivery of the Securities by the Company, compliance by the Company with any of the provisions of the Transaction Documents nor the application of the net proceeds from the sale of the Securities as described under “Use of Proceeds” in the Pricing Disclosure Package and the Prospectus will (i) conflict with or result in a breach or violation of any agreement, indenture or other instrument to which the Company or any of its subsidiaries is a party or by which any of them is bound, or to which any of their properties is subject; (ii) result in the creation or imposition of any claim, lien, encumbrance, security interest, restriction upon voting or transfer, preemptive rights or any other claim of any third party (collectively, “Liens”) upon any property or asset of the Company or any of its subsidiaries; (iii) result in a breach or violation of, or constitute a default under, the articles of incorporation, by-laws, partnership agreement or other organizational documents of the Company; or (iv) violate any law, rule, administrative regulation or decree of any court or any governmental agency or body having jurisdiction over the Company or any of its subsidiaries or any of their respective properties, except, with respect to clauses (i), (ii) and (iv), conflicts, breaches, Liens, defects or violations that would not reasonably be expected, individually or in the aggregate to have a material adverse effect on the condition (financial or otherwise), results of operations, properties or business of the Company and its subsidiaries taken as a whole or on the performance by the Company of this Agreement (a “Material Adverse Effect”).

(q) No permit, consent, approval, authorization or order of any court, governmental agency or body (including the Federal Energy Regulatory Commission) or financial institution is required for the issue and sale of the Securities, the execution, delivery and performance of the Transaction Documents by the Company, or the application of the net proceeds from the sale of the Securities as described under “Use of Proceeds” in the Pricing Disclosure Package and the Prospectus, except (i) for the registration of the Securities under the Securities

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Act; (ii) for the qualification of the Indenture under the Trust Indenture Act; (iii) from the Public Utilities Commission of the State of California; (iv) such consents, approvals, authorizations, orders, filings, registrations or qualifications as may be required under the Exchange Act and applicable state or foreign securities laws in connection with the purchase and sale of the Securities through the Underwriters; and (v) where the failure to obtain such permits, consents, approvals, authorizations, orders, filings, registrations or qualifications would not, individually or in the aggregate, reasonably be expected to have a Material Adverse Effect.

(r) There are no contracts, agreements or understandings between the Company and any person granting such person the right to require the Company to file a registration statement under the Securities Act with respect to any securities of the Company owned or to be owned by such person or to require the Company to include such securities in the securities registered pursuant to the Registration Statement or in any securities being registered pursuant to any other registration statement filed by the Company under the Securities Act.

(s) The Company has not sold or issued any securities that would be integrated with the offering of the Securities contemplated by this Agreement pursuant to the Securities Act, the Rules and Regulations or the interpretations thereof by the Commission.

(t) Since the respective dates as of which information is given in the Pricing Disclosure Package and the Prospectus, neither the Company nor any of its subsidiaries has (i) sustained any loss or interference with its business from fire, explosion, flood or other calamity, whether or not covered by insurance, or from any labor dispute or court or governmental action, order or decree; (ii) issued or granted any securities; (iii) incurred any liability or obligation, direct or contingent, other than liabilities and obligations that were incurred in the ordinary course of business, except as may otherwise be disclosed in the Pricing Disclosure Package and in the Prospectus; (iv) entered into any transaction not in the ordinary course of business, except as may otherwise be disclosed in the Pricing Disclosure Package and in the Prospectus; (v) declared or paid any dividend on its capital stock (other than Common Stock dividends payable on June 1, 2020 and September 1, 2020); or (vi) made or experienced any change in the capital stock or long-term debt of the Company or any of its subsidiaries or any adverse change, or any development involving a prospective adverse change, in or affecting the condition (financial or otherwise), results of operations, properties or business of the Company and its subsidiaries taken as a whole, in each case in this paragraph (except clause (v) hereof) as would not, individually or in the aggregate, reasonably be expected to have a Material Adverse Effect.

(u) The financial statements (including the related notes and supporting schedules) included or incorporated by reference in the Pricing Disclosure Package and the Prospectus present fairly in all material respects the consolidated financial condition, results of operations and cash flows of the entities purported to be shown thereby at the dates and for the periods indicated (subject to year-end adjustments in the case of unaudited interim financial statements) and have been prepared in accordance with U.S. generally accepted accounting principles (“GAAP”) applied on a consistent basis throughout the periods indicated and conform in all material respects with GAAP, except as otherwise noted therein; and the supporting schedules included or incorporated by reference in the Registration Statement present fairly in all material respects the information required to be stated therein. Except as included therein, no historical or pro forma financial statements or supporting schedules are required to be included or

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incorporated by reference in the Registration Statement, the Pricing Disclosure Package or the Prospectus under the Securities Act or the Rules and Regulations. The interactive data in eXtensible Business Reporting Language included or incorporated by reference in the Registration Statement, the Pricing Disclosure Package, and the Prospectus fairly presents the information called for in all material respects and has been prepared in accordance with the Commission’s rules and guidelines applicable thereto.

(v) PricewaterhouseCoopers LLP, who have reported on certain financial statements of the Company included or incorporated by reference in the Pricing Disclosure Package and the Prospectus and whose report is incorporated by reference in the Preliminary Prospectus and the Prospectus, are independent registered public accountants as required by the Securities Act and the Rules and Regulations, and were independent public accountants as required by the Securities Act and the Rules and Regulations during the periods covered by the financial statements on which they reported contained or incorporated by reference in the Registration Statement, the Pricing Disclosure Package and the Prospectus.

(w) The statistical and market-related data, if any, included in the Pricing Disclosure Package and the Prospectus and the consolidated financial statements of the Company and its subsidiaries included or incorporated by reference in the Pricing Disclosure Package and the Prospectus are based on or derived from sources that the Company believes to be reliable and accurate in all material respects.

(x) Neither the Company nor any of its subsidiaries is, and as of the Closing Date and, after giving effect to the offer and sale of the Securities and the application of the net proceeds therefrom as described under “Use of Proceeds” in the Pricing Disclosure Package and the Prospectus, none of them will be, an “investment company” within the meaning of such term under the Investment Company Act of 1940, as amended, and the rules and regulations of the Commission thereunder.

(y) There is no litigation or governmental proceeding to which the Company or any of its subsidiaries is a party or to which any property or assets of the Company or any of its subsidiaries is subject or which is pending or, to the knowledge of the Company, threatened against the Company or any of its subsidiaries that would, individually or in the aggregate, reasonably be expected to result in a Material Adverse Effect.

(z) There are no statutes or regulations, legal or governmental proceedings or contracts or other documents that would be required to be described in the Registration Statement, the Pricing Disclosure Package or the Prospectus (in each case including, without limitation, the documents incorporated by reference therein) or, in the case of contracts or other documents, to be filed as exhibits to the Registration Statement, that are not described and filed as required under applicable law.

(aa) To the knowledge of the Company, no labor disturbance by or dispute with the employees of the Company or any of its subsidiaries exists or is imminent that would reasonably be expected to have a Material Adverse Effect.

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(bb) (i) Except as would not, individually or in the aggregate, reasonably be expected to have a Material Adverse Effect, the Company and each of its subsidiaries and any “employee benefit plan” (as defined under the U.S. Employee Retirement Income Security Act of 1974, as amended (“ERISA,” which term, as used herein, includes the regulations and published interpretations thereunder)) established or maintained by the Company, any of its subsidiaries or their ERISA Affiliates (as defined below) are in compliance in all material respects with ERISA and, to the knowledge of the Company, each “multiemployer plan” (as defined in Section 4001 of ERISA) to which the Company, its subsidiaries or an ERISA Affiliate contributes (a “Multiemployer Plan”) is in compliance in all material respects with ERISA. “ERISA Affiliate” means, with respect to the Company or a subsidiary, any member of any group of organizations described in Section 414 of the U.S. Internal Revenue Code of 1986, as amended (the “Code,” which term, as used herein, includes the regulations and published interpretations thereunder) of which the Company or such subsidiary is a member. No “reportable event” (as defined under ERISA) has occurred or is reasonably expected to occur with respect to any “employee benefit plan” established or maintained by the Company, any of its subsidiaries or any of their ERISA Affiliates. Neither the Company, any of its subsidiaries nor any of their ERISA Affiliates has incurred or reasonably expects to incur any liability under (i) Title IV of ERISA (other than contributions to the “employee benefit plan” or premiums to the U.S. Pension Benefit Guaranty Corporation in the ordinary course and without default) or (ii) Sections 412, 4971, 4975 or 4980B of the Code or pursuant to Section 406 of ERISA. Each “employee benefit plan” established or maintained by the Company, any of its subsidiaries or any of their ERISA Affiliates that is intended to be qualified under Section 401 of the Code is so qualified and nothing has occurred, whether by action or by failure to act, which would materially adversely affect such qualification.

(cc) The Company and each of its subsidiaries have filed all material federal, state, local and foreign tax returns required to be filed through the date hereof, subject to permitted extensions, which returns are complete and correct in all material respects, and have paid all taxes due, and neither the Company nor any subsidiary is in default in the payment of any taxes which were payable pursuant to said returns or any assessments with respect thereto, except for any such taxes or assessments which are being contested in good faith by appropriate proceedings and for which appropriate reserves, if any, have been established in accordance with GAAP and statutory accounting principles, and no tax deficiency has been determined adversely to the Company or any of its subsidiaries. The Company does not have any knowledge of any tax deficiencies that have been, or could reasonably be expected to be, asserted against the Company that would, in the aggregate, reasonably be expected to have a Material Adverse Effect.

(dd) Neither the Company nor any of its subsidiaries is in violation of its respective articles of incorporation or by-laws or other organizational documents, and neither the Company nor any of its subsidiaries (i) is in default, and no event has occurred which, with notice or lapse of time or both, would constitute such a default, in the due performance or observance of any term, covenant or condition contained in any indenture, mortgage, deed of trust, loan agreement, license or other agreement or instrument to which it is a party or by which it is bound or to which any of its properties or assets is subject or (ii) is in violation of any law, ordinance, rule, regulation or order of any court or governmental agency or body having jurisdiction over it or its property or assets, except in the case of clauses (i) and (ii), to the extent any such conflict, breach, violation or default would not, individually or in the aggregate, reasonably be expected to have a Material Adverse Effect.

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(ee) The Company is and, to the knowledge of the Company, its officers and directors are, in compliance in all material respects with the Sarbanes-Oxley Act of 2002 and the rules and regulations promulgated in connection therewith.

(ff) (i) Each of the Company and its subsidiaries holds such permits, licenses, patents, franchises, certificates of need, authorities and other approvals or authorizations from governmental or regulatory authorities (collectively, the “Permits”) which are necessary under applicable law to the conduct of its businesses as presently operated and to own its properties and conduct its businesses in the manner described in the Pricing Disclosure Package and the Prospectus, except where the failure to obtain such Permits would not, individually or in the aggregate, reasonably be expected to have a Material Adverse Effect; (ii) each of the Company and its subsidiaries has fulfilled and performed all of its obligations necessary to maintain the Permits, except where the failure to fulfill or perform such obligations would not, individually or in the aggregate, reasonably be expected to have a Material Adverse Effect; and (iii) there is no past, pending or, to the knowledge of the Company or any of its subsidiaries, threatened action, suit, proceeding or investigation that may reasonably be expected to lead to the revocation, termination or suspension of any Permit, except where such revocation, termination or suspension would not, individually or in the aggregate, reasonably be expected to have a Material Adverse Effect. Neither the Company nor any of its subsidiaries has received notice of any revocation or modification of any such Permits or has any reason to believe that any such Permits will not be renewed in the ordinary course, except where such revocation, modification or non-renewal would not reasonably be expected to result in a Material Adverse Effect.

(gg) The Company and its subsidiaries own or possess, or have the ability to acquire, all patents, patent rights, licenses, inventions, copyrights, know-how (including trade secrets and other unpatented and/or unpatentable proprietary or confidential information, systems or procedures), trademarks, service marks and trade names currently employed by them in connection with the business now operated by them, except where the failure to own, possess or have the ability to acquire such patents, patent rights, licenses, inventions, copyrights, know-how (including trade secrets and other unpatented and/or unpatentable proprietary or confidential information, systems or procedures), trademarks, service marks and trade names would not, individually or in the aggregate, reasonably be expected to have a Material Adverse Effect, and none of the Company nor its subsidiaries has received any notice of infringement of or conflict with asserted rights of others with respect to any of the foregoing which, individually or in the aggregate, if subject to any unfavorable decision, ruling or finding, would reasonably be expected to have a Material Adverse Effect.

(hh) The Company and its subsidiaries (i) are in compliance with any and all applicable foreign, federal, state and local laws and regulations relating to the protection of human health and safety, the environment or hazardous or toxic substances or wastes, pollutants or contaminants (“Environmental Laws”); (ii) have received all permits, licenses or other approvals required of them under applicable Environmental Laws to conduct their respective businesses; and (iii) are in compliance with all terms and conditions of any such permit, license or approval, except where such noncompliance with Environmental Laws, failure to receive required permits, licenses or other approvals or failure to comply with the terms and conditions of such permits, licenses or approvals would not, individually or in the aggregate, reasonably be expected to have a Material Adverse Effect.

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(ii) Neither the Company nor any of its subsidiaries, nor, to the knowledge of the Company, any director, officer, agent, employee or other person acting on behalf of the Company or any of its subsidiaries, has (i) used any corporate funds for any unlawful contribution, gift, entertainment or other unlawful expense relating to political activity; (ii) made any direct or indirect unlawful payment to any foreign or domestic government official or employee from corporate funds; or (iii) made any bribe or other unlawful payment.

(jj) Neither the Company nor any of its subsidiaries nor, to the Company’s knowledge, any director, officer, agent, employee or affiliate of the Company or any of its subsidiaries has taken any action, directly or indirectly, that would result in a violation by such persons of the Foreign Corrupt Practices Act of 1977, as amended, and the rules and regulations thereunder (the “FCPA”) or any other applicable anti-bribery or anti-corruption law, including, without limitation, making use of the mails or any means or instrumentality of interstate commerce corruptly in furtherance of an offer, payment, promise to pay or authorization of the payment of any money, or other property, gift, promise to give, or authorization of the giving of anything of value to any “foreign official” (as such term is defined in the FCPA) or any foreign political party or official thereof or any candidate for foreign political office, in contravention of the FCPA, and the Company, its subsidiaries and, to the knowledge of the Company, its affiliates have conducted their businesses in compliance with the FCPA and have instituted and maintain policies and procedures designed to ensure, and which are reasonably expected to continue to ensure, continued compliance therewith.

(kk) The operations of the Company and its subsidiaries are and have been conducted at all times in compliance with applicable financial recordkeeping and reporting requirements of the Currency and Foreign Transactions Reporting Act of 1970, as amended, the money laundering statutes of all applicable jurisdictions, the rules and regulations thereunder and any related or similar rules, regulations or guidelines, issued, administered or enforced by any applicable governmental agency (collectively, the “Money Laundering Laws”) and no action, suit or proceeding by or before any court or governmental agency, authority or body or any arbitrator involving the Company or any of its subsidiaries with respect to the Money Laundering Laws is pending or, to the knowledge of the Company, threatened.

(ll) Neither the Company nor any of its subsidiaries nor, to the knowledge of the Company, any director, officer, agent, employee or affiliate of the Company or any of its subsidiaries is currently subject to any sanctions administered by the Office of Foreign Assets Control of the U.S. Treasury Department (“OFAC”) or any sanctions imposed or administered by any other jurisdiction where the Company operates (collectively, “Sanctions”); nor is the Company or any of its subsidiaries located, organized or resident in a country or territory that is the subject or target of Sanctions, including, without limitation, Crimea, Cuba, Iran, North Korea and Syria (each, a “Sanctioned Country”); and the Company will not directly or indirectly use the net proceeds of the offering, or lend, contribute or otherwise make available such proceeds to any subsidiary, joint venture partner or other person or entity, (i) for the purpose of financing the activities of any person currently subject to any Sanctions or (ii) to fund or facilitate any activities of or business in any Sanctioned Country.

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(mm) The Company has not distributed and, prior to the later to occur of the Closing Date and completion of the distribution of the Securities, will not distribute any offering material in connection with the offering and sale of the Securities other than the Preliminary Prospectus, the Prospectus and any Issuer Free Writing Prospectus to which the Representatives have consented in accordance with Section 1(j) or 5(a)(vi) hereof (such consent not to be unreasonably withheld or delayed).

(nn) None of the Company, nor its subsidiaries or affiliates, has taken nor will take, directly or indirectly, any action designed to or that has constituted or that could reasonably be expected to cause or result in the stabilization or manipulation of the price of any security of the Company to facilitate the sale or resale of the Securities.

(oo) The Company and its subsidiaries, on a consolidated basis, maintain systems of internal control over financial reporting (as such term is defined in Rule 13a-15(f) under the Exchange Act) that have been designed by, or under the supervision of, their respective principal executive and principal financial officers, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with GAAP and statutory accounting principles. The Company and its subsidiaries, on a consolidated basis, maintain a system of internal accounting controls sufficient to provide reasonable assurances that (i) transactions are executed in accordance with management’s general or specific authorization; (ii) transactions are recorded as necessary to permit preparation of financial statements in conformity with GAAP and statutory accounting practices and to maintain accountability for assets; (iii) access to assets is permitted only in accordance with management’s general or specific authorization; (iv) interactive data in eXtensbile Business Reporting Language included or incorporated by reference in the Registration Statement, the Pricing Disclosure Package, and the Prospectus is prepared in accordance with the Commission’s rules and guidelines applicable thereto, and (v) recorded assets are compared with existing assets at reasonable intervals and appropriate action is taken with respect to any differences.

(pp) The Company and its subsidiaries, on a consolidated basis, have established and maintain disclosure controls and procedures (as such term is defined in Rule 13a-15(e) under the Exchange Act) that have been designed to ensure that material information relating to the Company and its subsidiaries required to be disclosed in the reports the Company files or submits under the Exchange Act is made known to the Company’s principal executive officer and principal financial officer by others within those entities; and such disclosure controls and procedures are effective in all material respects to perform the functions for which they were established.

(qq) Since the respective dates as of which information is given in the Preliminary Prospectus, (i) the Company has not been advised of any fraud, whether or not material, that involves management or other employees who have a significant role in the internal controls of the Company and each of its subsidiaries and (ii) there have been no significant changes in internal controls or in other factors that would significantly affect internal controls, including any corrective actions with regard to significant deficiencies and material weaknesses requiring disclosure in the Company’s most recently filed Annual Report on Form 10-K.

(rr) The Company and each of its subsidiaries have good and marketable title in fee simple to all real property and good and marketable title to all personal property owned by them, in each case free and clear of all Liens, except where the failure to have such good and marketable title or the existence of any such Liens would not, individually or in the aggregate,

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reasonably be expected to have a Material Adverse Effect. All assets held under lease by the Company and its subsidiaries are held by them under valid, subsisting and enforceable leases with such exceptions as do not materially interfere with the use made and proposed to be made of such assets by the Company and its subsidiaries, except where the failure of any such leases to be valid, subsisting or enforceable or the existence of such exceptions would not, individually or in the aggregate, reasonably be expected to have a Material Adverse Effect.

(ss) No relationship, direct or indirect, exists between or among the Company, on the one hand, and the directors, officers, shareholders, customers or suppliers of the Company, on the other hand, that is required to be described in the Pricing Disclosure Package or the Prospectus which is not so described.

(tt) The statements set forth in the Preliminary Prospectus and the Prospectus under the captions “Description of Other Indebtedness,” “Description of the Notes,” and “Material United States Federal Income Tax Considerations,” insofar as they purport to describe the Securities, and other documents and legal matters referred to therein, are accurate in all material respects.

(uu) Neither the Company nor any of its subsidiaries is a party to any contract, agreement or understanding with any person (other than this Agreement) that would give rise to a valid claim against any of them or the Underwriters for a brokerage commission, finder’s fee or like payment in connection with the offering and sale of the Securities.

(vv) None of the net proceeds from the sale of the Securities has been or will be paid to the Underwriters (except for the payment of the commissions pursuant to this Agreement) or, to the knowledge of the Company, to any affiliate of the Underwriters; and the Company is not an “affiliate” (as defined in FINRA Rule 5121) of any member of the Financial Industry Regulatory Authority (“FINRA”).

(ww) Except as disclosed in the Registration Statement, the Pricing Disclosure Package and the Prospectus, the Company (i) does not have any material lending or other relationship with any bank or lending affiliate of any Underwriter and (ii) does not intend to use any of the proceeds from the sale of the Securities to repay any outstanding debt owed to any affiliate of any Underwriter.

(xx) The Company and its subsidiaries are in compliance with, and conduct their respective businesses in conformity with, all applicable state, federal, local and foreign laws and regulations relating to the operation and ownership of a public utility, including, without limitation, those relating to the distribution and transmission of natural gas, except to the extent that any failure so to comply or conform would not, individually or in the aggregate, reasonably be expected to have a Material Adverse Effect.

(yy) Each of the Company and its subsidiaries believes they are insured with policies in such amounts and with such deductibles and covering such risks as are generally deemed adequate and customary for their businesses, including, but not limited to, insurance against accidents, third-party injury or general liability and insurance covering certain real and personal property owned or leased by the Company and each of its subsidiaries against theft,

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damage, destruction, acts of vandalism and all other risks customarily insured against. All policies of insurance insuring the Company or any of its subsidiaries or their respective businesses, assets, employees, officers and directors are in full force and effect; the Company and its subsidiaries are in compliance with the terms of such policies and instruments in all material respects; and there are no claims by the Company or any of its subsidiaries, that individually or in the aggregate are material to the Company and its subsidiaries taken together as a whole, under any such policy or instrument as to which any insurance company is denying liability or defending under a reservation of rights clause; and, except as set forth in the Pricing Disclosure Package and the Prospectus, neither the Company nor any of its subsidiaries has been refused any insurance coverage sought or applied for. The Company has no reason to believe that it or any of its subsidiaries will not be able (i) to renew its existing insurance coverage as and when such policies expire or (ii) to obtain comparable coverage from similar institutions as may be necessary or appropriate to conduct its business as now conducted and at a cost that would not reasonably be expected to have a Material Adverse Effect.

(zz) The Company and its subsidiaries’ information technology assets and equipment, computers, systems, networks, hardware, software, websites, applications, and databases (collectively, “IT Systems”) are adequate for, and operate and perform in all material respects as required in connection with the operation of the business of the Company and its subsidiaries as currently conducted, free and clear of all material bugs, errors, defects, Trojan horses, time bombs, malware and other corruptants. The Company and its subsidiaries have implemented and maintained commercially reasonable controls, policies, procedures, and safeguards to maintain and protect their material confidential information and the integrity, continuous operation, redundancy and security of all IT Systems and data (including all personal, personally identifiable, sensitive, confidential or regulated data (“Personal Data”)) used in connection with their businesses, and there have been no breaches, violations, outages or unauthorized uses of or accesses to the same, except for those that have been remedied without material cost or liability or the duty to notify any other person, nor any incidents under internal review or investigations relating to the same. The Company and its subsidiaries are presently in material compliance with all applicable laws or statutes and all judgments, orders, rules and regulations of any court or arbitrator or governmental or regulatory authority, internal policies and contractual obligations relating to the privacy and security of IT Systems and Personal Data and to the protection of such IT Systems and Personal Data from unauthorized use, access, misappropriation or modification.

Any certificate signed by any officer of the Company and delivered to the Underwriters or counsel for the Underwriters in connection with the offering of the Securities shall be deemed a representation and warranty by the Company to each Underwriter as to matters covered thereby.

2. Purchase of the Securities by the Underwriters. On the basis of the representations and warranties contained in, and subject to the terms and conditions of, this Agreement, the Company agrees to sell the Securities at a price equal to 99.224% of the aggregate principal amount thereof, plus accrued interest, if any, from June 4, 2020, to the several Underwriters, and each of the Underwriters, severally and not jointly, agrees to purchase the principal amount of the Securities set forth opposite that Underwriter’s name in Schedule 1 hereto.

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The Company shall not be obligated to deliver any of the Securities to be delivered on the Closing Date, except upon payment for all such Securities to be purchased on such Closing Date as provided herein.

3. Offering of Securities by the Underwriters. The Company understands that the Underwriters intend to make a public offering of the Securities, and initially to offer the Securities on the terms set forth in the Pricing Disclosure Package. The Company acknowledges and agrees that the Underwriters may offer and sell Securities to or through any affiliate of an Underwriter.

4. Delivery of and Payment for the Securities. Delivery of and payment for the Securities shall be made at 10:00 a.m. New York City time, on June 4, 2020 or at such other date or place as shall be determined by agreement between the Representatives and the Company. This date and time are sometimes referred to as the “Closing Date.” Delivery of the Securities shall be made to the Representatives against payment by the several Underwriters through the Representatives of the respective aggregate purchase prices of the Securities being sold by the Company by wire transfer in immediately available funds to the accounts specified by the Company. Time shall be of the essence, and delivery at the time and place specified pursuant to this Agreement is a further condition of the obligation of each Underwriter hereunder. The Company shall deliver the Securities through the facilities of Depository Trust Company unless the Representatives shall otherwise instruct.

5. Further Agreements of the Company and the Underwriters.

(a) The Company agrees:

(i) To prepare the Prospectus in a form approved by the Representatives and to file such Prospectus pursuant to Rule 424(b) not later than the Commission’s close of business on the second business day following the execution and delivery of this Agreement; to make no further amendment or any supplement to the Registration Statement or the Prospectus prior to the Closing Date except as provided herein; to advise the Representatives in writing, promptly after it receives notice thereof, of the time when any amendment or supplement to the Registration Statement or the Prospectus has been filed and to furnish the Representatives with copies thereof; to file promptly all reports and any definitive proxy or information statements required to be filed by the Company with the Commission pursuant to Sections 13(a), 13(c), 14 or 15(d) of the Exchange Act subsequent to the date of the Prospectus and for so long as the delivery of a prospectus is required in connection with the offering or sale of the Securities; to advise the Representatives in writing, promptly after it receives notice thereof, of the issuance by the Commission of any stop order or of any order preventing or suspending the use of the Prospectus or any Issuer Free Writing Prospectus, of the suspension of the qualification of the Securities for offering or sale in any jurisdiction, of the initiation or threatening of any proceeding or examination for any such purpose or pursuant to Section 8A, of any notice from the Commission objecting to the use of the form of the Registration Statement or any post-effective amendment thereto pursuant to Rule 401(g)(2) under the Securities Act or of any request by the Commission for the amending or supplementing of the Registration Statement, the Prospectus or any Issuer Free Writing Prospectus or for additional information; and, in the event of the issuance of any stop order or of any order preventing or suspending the use of the Prospectus or any Issuer Free Writing Prospectus or suspending any such qualification, to use promptly its reasonable best efforts to obtain its withdrawal;

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(ii) To pay the applicable Commission filing fees relating to the Securities within the time required by Rule 456(b)(1) of the Rules and Regulations without regard to the proviso therein;

(iii) To deliver promptly to the Representatives such number of written or electronic copies of the following documents as the Representatives shall reasonably request: (A) conformed copies of the Registration Statement as originally filed with the Commission and each amendment thereto (in each case excluding exhibits other than this Agreement and the portions of the annual report to shareholders incorporated by reference into the Company’s Form 10-K for the year ended December 31, 2019), (B) the Preliminary Prospectus, the Prospectus and any amended or supplemented Prospectus, (C) each Issuer Free Writing Prospectus and (D) any document incorporated by reference in the Preliminary Prospectus or the Prospectus, it being understood that with regard to (A) and (D) above, availability to the Underwriters on the Commission’s EDGAR database of the documents referenced therein shall satisfy any such delivery obligations with respect thereto; and, if the delivery of a prospectus is required at any time after the date hereof in connection with the offering or sale of the Securities or any other securities relating thereto and if at such time any events shall have occurred as a result of which the Prospectus as then amended or supplemented would include an untrue statement of a material fact or omit to state any material fact necessary in order to make the statements therein, in the light of the circumstances under which they were made when such Prospectus is delivered, not misleading, or, if for any other reason it shall be necessary to amend or supplement the Prospectus or to file under the Exchange Act any document incorporated by reference in the Prospectus in order to comply with the Securities Act, the Exchange Act or the Trust Indenture Act, to notify the Representatives in writing and, upon their request, to file such document and to prepare and furnish without charge to each Underwriter and to any dealer in securities as many copies as the Representatives may from time to time reasonably request of an amended or supplemented Prospectus that will correct such statement or omission or effect such compliance;

(iv) To file promptly with the Commission any amendment or supplement to the Registration Statement or the Prospectus that may, in the judgment of the Company, be required by the Securities Act or requested by the Commission, provided, however, that the Company shall consider in good faith any recommendations of the Representatives related thereto;

(v) Prior to filing with the Commission any amendment or supplement to the Registration Statement or the Prospectus, any document incorporated by reference in the Prospectus or any amendment to any document incorporated by reference in the Prospectus, to furnish a copy thereof to the Representatives and counsel for the Underwriters and obtain the written consent (which written consent may be communicated by electronic communication) of the Representatives to the filing (such consent not to be unreasonably delayed or withheld);

(vi) Not to make any offer relating to the Securities that would constitute an Issuer Free Writing Prospectus without the prior written consent (including written consent provided via electronic mail) of the Representatives (such consent not to be unreasonably delayed or withheld);

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(vii) To comply with all applicable requirements of Rule 433 of the Rules and Regulations with respect to any Issuer Free Writing Prospectus; and if at any time after the date hereof any events shall have occurred as a result of which any Issuer Free Writing Prospectus, as then amended or supplemented, would conflict with the information in the Registration Statement, the Pricing Disclosure Package or the Prospectus or would include an untrue statement of a material fact or omit to state any material fact necessary in order to make the statements therein, in the light of the circumstances under which they were made, not misleading, or, if for any other reason it shall be necessary to amend or supplement any Issuer Free Writing Prospectus, to notify the Representatives and, upon their reasonable request, to file such document and to prepare and furnish without charge to each Underwriter as many copies as the Representatives may from time to time reasonably request of an amended or supplemented Issuer Free Writing Prospectus that will correct such conflict, statement or omission or effect such compliance;

(viii) As soon as practicable after the Effective Date and in any event not later than 16 months after the date hereof, to make generally available to the Company’s security holders and to deliver to the Representatives an earnings statement of the Company and its subsidiaries (which need not be audited) complying with Section 11(a) of the Securities Act and the Rules and Regulations;

(ix) Promptly from time to time to take such action as the Underwriters may reasonably request to qualify the Securities for offering and sale under the securities or Blue Sky laws of such jurisdictions as the Underwriters may reasonably request, and to maintain such qualifications in effect for as long as may be necessary to complete the distribution of the Securities; provided that in connection therewith the Company shall not be required to (i) qualify as a foreign corporation in any jurisdiction in which it would not otherwise be required to so qualify; (ii) file a general consent to service of process in any such jurisdiction; or (iii) subject itself to taxation in any jurisdiction in which it would not otherwise be subject; and

(x) To apply the net proceeds from the sale of the Securities being sold by the Company as set forth in the Preliminary Prospectus and the Prospectus.

(b) Each Underwriter severally represents and agrees that, unless it obtains the prior written consent (including written consent provided via electronic mail) of the Company and the Representatives, it has not made and will not make any offer relating to the Securities that would constitute an “issuer free writing prospectus,” as defined in Rule 433 of the Rules and Regulations, or that would otherwise constitute a “free writing prospectus,” as defined in Rule 405 of the Rules and Regulations, required to be filed with the Commission.

6. Expenses. The Company will pay and bear all costs and expenses incident to the performance of its obligations under this Agreement, including (i) the preparation, printing and filing of the Registration Statement (including financial statements and any schedules or exhibits and any documents incorporated therein by reference), as originally filed and as amended, the Pricing Disclosure Package and the Prospectus and any amendments or supplements thereto, and the cost of furnishing copies thereof in accordance with Section 5(a)(iii) of this Agreement thereto

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to the Underwriters; (ii) the preparation, printing and distribution of this Agreement, the Indenture, the Securities, the blue sky survey and the legal investment survey; (iii) the delivery of the Securities to the Underwriters; (iv) the fees and disbursements of the Company’s counsel and accountants; (v) the qualification of the Securities under the applicable securities laws in accordance with Section 5(a)(ix) and any filing for review of the offering with FINRA; (vi) any fees charged by rating agencies for rating the Securities; and (vii) the fees and expenses of the Trustee, including the fees and disbursements of counsel for the Trustee, in connection with the Indenture and the Securities.

7. Conditions of Underwriters’ Obligations. The respective obligations of the Underwriters hereunder are subject to the accuracy, when made and on the date of the Prospectus and on the Closing Date, of the representations and warranties of the Company contained herein, to the performance by the Company of its obligations hereunder, and to each of the following additional terms and conditions:

(a) The Prospectus shall have been timely filed with the Commission in accordance with Section 5(a)(i) and Section 5(a)(iv) hereof; the Company shall have complied with all filing requirements applicable to any Issuer Free Writing Prospectus used or referred to after the date hereof; no stop order suspending the effectiveness of the Registration Statement or preventing or suspending the use of the Prospectus or any Issuer Free Writing Prospectus shall have been issued and no proceeding or examination for such purpose or pursuant to Section 8A under the Securities Act shall have been initiated or threatened by the Commission; any request of the Commission for inclusion of additional information in the Registration Statement or the Prospectus or any document incorporated by reference therein or otherwise shall have been complied with; and the Commission shall not have notified the Company of any objection to the use of the form of the Registration Statement or any post-effective amendment thereto.

(b) No Underwriter shall have discovered and disclosed to the Company on or prior to the Closing Date that the Registration Statement, the Prospectus or the Pricing Disclosure Package, or any amendment or supplement thereto, contains an untrue statement of a fact which, in the reasonable opinion of Ballard Spahr LLP, counsel for the Underwriters, is material or omits to state a fact which, in the opinion of such counsel, is material and is required to be stated therein or is necessary to make the statements therein not misleading.

(c) All corporate proceedings and other legal matters incident to the authorization, form and validity of this Agreement, the Securities, the Indenture, the Registration Statement, the Prospectus and any Issuer Free Writing Prospectus, and all other legal matters relating to this Agreement and the transactions contemplated hereby shall be reasonably satisfactory in all material respects to counsel for the Underwriters, and the Company shall have furnished to such counsel all documents and information that they may reasonably request to enable them to pass upon such matters.

(d) Morrison & Foerster LLP shall have furnished to the Underwriters its written opinion and its separate negative assurance letter, as counsel to the Company, addressed to the Underwriters and delivered and dated the Closing Date, in form and substance reasonably satisfactory to the Underwriters, addressing the matters set forth on Exhibit A attached hereto.

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(e) Thomas E. Moran, Corporate Secretary/Legal Counsel, shall have furnished to the Underwriters his written opinion addressed to the Underwriters and delivered and dated the Closing Date, in form and substance reasonably satisfactory to the Underwriters, addressing the matters set forth on Exhibit B attached hereto.

(f) The Representatives shall have received from Ballard Spahr LLP, counsel for the Underwriters, such opinion or opinions, dated the Closing Date, with respect to the issuance and sale of the Securities, the Registration Statement, the Prospectus and the Pricing Disclosure Package and other related matters as the Representatives may reasonably require, and the Company shall have furnished to such counsel such documents as they reasonably request for the purpose of enabling them to pass upon such matters.

(g) At the time of execution of this Agreement, the Representatives shall have received from PricewaterhouseCoopers LLP a letter, in form and substance reasonably satisfactory to the Representatives, addressed to the Underwriters and the Company and dated the date hereof (i) confirming that they are independent registered public accountants within the meaning of the Securities Act and are in compliance with the applicable requirements relating to the qualification of accountants under Rule 2-01 of Regulation S-X of the Commission and (ii) stating, as of the date hereof (or, with respect to matters involving changes or developments since the respective dates as of which specified financial information is given in the Preliminary Prospectus, as of a date not more than three days prior to the date hereof), the conclusions and findings of such firm with respect to the financial information and other matters ordinarily covered by accountants’ “comfort letters” to underwriters in connection with registered public offerings.

(h) With respect to the letter of PricewaterhouseCoopers LLP referred to in the preceding paragraph and delivered to the Representatives concurrently with the execution of this Agreement (the “initial letter”), PricewaterhouseCoopers LLP shall have furnished to the Representatives a letter (the “bring-down letter”) of such accountants, addressed to the Underwriters and the Company and dated the Closing Date (i) confirming that they are independent public accountants within the meaning of the Securities Act and are in compliance with the applicable requirements relating to the qualification of accountants under Rule 2-01 of Regulation S-X of the Commission; (ii) stating, as of the date of the bring-down letter (or, with respect to matters involving changes or developments since the respective dates as of which specified financial information is given in the Prospectus, as of a date not more than two days prior to the date of the bring-down letter), the conclusions and findings of such firm with respect to the financial information and other matters covered by the initial letter; (iii) covering financial information in the Prospectus; and (iv) confirming in all material respects the conclusions and findings set forth in the initial letter.

(i) The Company shall have furnished to the Representatives a certificate, dated the Closing Date, of any vice-president of the Company and the principal financial officer, vice president/treasurer or principal accounting officer of the Company satisfactory to the Representatives to the effect that:

(i) The representations and warranties of the Company in Section 1 are true and correct with the same force and effect as though expressly made on and as of the Closing Date, and the Company has complied with all its agreements contained herein and satisfied all the conditions on its part to be performed or satisfied hereunder at or prior to the Closing Date;

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(ii) No stop order suspending the effectiveness of the Registration Statement has been issued; no proceedings or examination for that purpose or pursuant to Section 8A under the Securities Act have been instituted or, to the knowledge of such officers, threatened; and the Commission has not notified the Company of any objection to the use of the form of the Registration Statement or any post-effective amendment thereto; and

(iii) They have examined the Registration Statement, the Prospectus and the Pricing Disclosure Package, and, in their opinion, (1) the Registration Statement, as of each Effective Date, (2) the Prospectus, as of its date and as of the Closing Date, and (3) the Pricing Disclosure Package, as of the Applicable Time and as of the Closing Date, did not and do not contain any untrue statement of a material fact and did not and do not omit to state a material fact required to be stated therein or necessary to make the statements therein (except in the case of the Registration Statement, in the light of the circumstances under which they were made) not misleading.

(j) Except as described in the Pricing Disclosure Package and the Prospectus, (i) neither the Company nor any of its subsidiaries shall have sustained, since the respective dates as of which information is given in the Pricing Disclosure Package, any loss or interference with its business from fire, explosion, flood or other calamity, whether or not covered by insurance, or from any labor dispute or court or governmental action, order or decree or (ii) since such date there shall not have been any change in the capital stock; or long-term debt of the Company or any of its subsidiaries or any change, or any development involving a prospective change, in or affecting the condition (financial or otherwise), results of operations, stockholders’ equity, business or properties of the Company and its subsidiaries taken as a whole, the effect of which, in any such case described in clause (i) or (ii), is, individually or in the aggregate, in the reasonable judgment of the Representatives, so material and adverse as to make it impracticable or inadvisable to proceed with the offering or sale of the Securities being delivered on the Closing Date on the terms and in the manner contemplated in the Pricing Disclosure Package, the Prospectus or this Agreement.

(k) Subsequent to the execution and delivery of this Agreement, (i) no downgrade in the rating of the Company or its financial strength or the rating of any of the Company’s securities by any “nationally recognized statistical rating organization,” as such term is defined in Section 3(a)(62) of the Exchange Act (the “Rating Agencies”) shall have occurred or be pending and (ii) no Rating Agency shall have publicly announced that it has under surveillance or review, with possible negative implications, its rating of the Company or the Company’s financial strength or its rating of any of the Company’s securities.

(l) Subsequent to the execution and delivery of this Agreement, there shall not have occurred any of the following: (i) trading in securities generally on the New York Stock Exchange or the NASDAQ National Market, or trading in any securities of the Company on any exchange or in the over-the-counter market, shall have been suspended or materially limited or the settlement of such trading generally shall have been materially disrupted or minimum prices shall have been established on any such exchange or such market by the Commission, by such exchange

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or by any other regulatory body or governmental authority having jurisdiction; (ii) a general moratorium on commercial banking activities shall have been declared by federal or New York state authorities; or (iii) the United States shall have become engaged in hostilities, there shall have been an escalation in hostilities involving the United States, there shall have been a declaration of a national emergency or war by the United States, there shall have occurred such a material adverse change in general economic, political or financial conditions, including, without limitation, as a result of terrorist activities after the date hereof (or the effect of international conditions on the financial markets in the United States shall be such), as to make it, in the judgment of the Representatives, impracticable or inadvisable to proceed with the offering or sale of the Securities being delivered on the Closing Date on the terms and in the manner contemplated in the Pricing Disclosure Package, the Prospectus or this Agreement.

(m) No action shall have been taken and no statute, rule, regulation or order shall have been enacted, adopted or issued by any federal, state or foreign governmental or regulatory authority that would, as of the Closing Date, prevent the issuance or sale of the Securities; and no injunction or order of any federal, state or foreign court shall have been issued that would, as of the Closing Date, prevent the issuance or sale of the Securities.

(n) At the time of execution of this Agreement and on the Closing Date, the Representatives shall have received a certificate of the Chief Financial Officer of the Company, dated as of such date, in a form reasonable satisfactory to the Representatives.

(o) On or prior to the Closing Date, the Company shall have furnished to the Representatives such further certificates and documents as the Representatives may reasonably request.

All opinions, letters, evidence and certificates mentioned above or elsewhere in this Agreement shall be deemed to be in compliance with the provisions hereof only if they are in form and substance reasonably satisfactory to counsel for the Underwriters.

8. Indemnification and Contribution.

(a) The Company shall indemnify and hold harmless each Underwriter, its affiliates, directors, officers, members and employees and each person, if any, who controls any Underwriter within the meaning of Section 15 of the Securities Act, from and against any loss, claim, damage or liability, joint or several, or any action in respect thereof (including, but not limited to, any loss, claim, damage, liability or action relating to purchases and sales of Securities), to which such Underwriter or such affiliate, director, officer, member, employee or controlling person may become subject, under the Securities Act or otherwise, insofar as such loss, claim, damage, liability or action arises out of, or is based upon, (i) any untrue statement or alleged untrue statement of a material fact contained in (A) the Preliminary Prospectus, the Registration Statement, the Prospectus or in any amendment or supplement thereto, (B) any Issuer Free Writing Prospectus or in any amendment or supplement thereto, (C) any “issuer information” (as defined in Rule 433 of the Rules and Regulations) used or referred to in any “free writing prospectus” (as defined in Rule 405 of the Rules and Regulations) used or referred to by any Underwriter (“Permitted Issuer Information”), or (D) any road show as defined in Rule 433(h) under the Securities Act (a “Road Show”) or (ii) the omission or alleged omission to state in the Preliminary

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Prospectus, the Registration Statement, the Prospectus, any Issuer Free Writing Prospectus or in any amendment or supplement thereto or in any Permitted Issuer Information or any Road Show, any material fact required to be stated therein or necessary to make the statements therein, (except in the case of the Registration Statement) in the light of the circumstances under which they were made, not misleading, and shall reimburse each Underwriter and each such affiliate, director, officer, member, employee or controlling person promptly upon demand for any legal or other expenses reasonably incurred by the Underwriter or such affiliate, director, officer, member, employee or controlling person in connection with investigating or defending or preparing to defend against any such loss, claim, damage, liability or action as such expenses are incurred; provided, however, that the Company shall not be liable in any such case to the extent that any such loss, claim, damage, liability or action arises out of, or is based upon, any untrue statement or alleged untrue statement or omission or alleged omission made in the Preliminary Prospectus, the Prospectus, any Issuer Free Writing Prospectus, or in any amendment or supplement thereto, in reliance upon and in conformity with written information concerning such Underwriter furnished to the Company through the Representatives by or on behalf of any Underwriter specifically for inclusion therein, which information consists solely of the information specified in Section 8(e) hereof. The foregoing indemnity agreement is in addition to any liability which the Company may otherwise have to any Underwriter or to any affiliate, director, officer, member, employee or controlling person of that Underwriter.

(b) Each Underwriter, severally and not jointly, shall indemnify and hold harmless the Company, its directors, officers and employees, and each person, if any, who controls the Company within the meaning of Section 15 of the Securities Act, from and against any loss, claim, damage or liability, joint or several, or any action in respect thereof, to which the Company or any such director, officer, employee or controlling person may become subject, under the Securities Act or otherwise, insofar as such loss, claim, damage, liability or action arises out of, or is based upon (i) any untrue statement or alleged untrue statement of a material fact contained in the Preliminary Prospectus, the Prospectus, any Issuer Free Writing Prospectus, any Road Show or in any amendment or supplement thereto, or (ii) the omission or alleged omission to state in the Preliminary Prospectus, the Prospectus or any Issuer Free Writing Prospectus, any Road Show, or in any amendment or supplement thereto, any material fact required to be stated therein or necessary to make the statements therein, in the light of the circumstances under which they were made, not misleading, but in each case only to the extent that the untrue statement or alleged untrue statement or omission or alleged omission was made in reliance upon and in conformity with written information concerning such Underwriter furnished to the Company through the Representatives by or on behalf of any Underwriter specifically for inclusion therein, which information consists solely of the information specified in Section 8(e) hereof, and shall reimburse the Company, each of its directors, officers, employees or controlling persons promptly upon demand for any legal or other expenses reasonably incurred by the Company or such director, officer, employee or controlling person in connection with investigating or defending or preparing to defend against any such loss, claim, damage, liability or action as such expenses are incurred. The foregoing indemnity agreement is in addition to any liability that any Underwriter may otherwise have to the Company or any such director, officer, employee or controlling person of the Company.

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(c) Promptly after receipt by an indemnified party under this Section 8 of notice of any claim or the commencement of any action, the indemnified party shall, if a claim in respect thereof is to be made against the indemnifying party under this Section 8, notify the indemnifying party in writing of the claim or the commencement of that action; provided, however, that the failure to notify the indemnifying party shall not relieve it from any liability which it may have under this Section 8 except to the extent it has been materially prejudiced by such failure and, provided, further, that the failure to notify the indemnifying party shall not relieve it from any liability which it may have to an indemnified party otherwise than under this Section 8. If any such claim or action shall be brought against an indemnified party, and it shall notify the indemnifying party thereof, the indemnifying party shall be entitled to participate therein and, to the extent that it wishes, jointly with any other similarly notified indemnifying party, to assume the defense thereof with one counsel reasonably satisfactory to the indemnified party. After notice from the indemnifying party to the indemnified party of its election to assume the defense of such claim or action, the indemnifying party shall not be liable to the indemnified party under this Section 8 for any legal or other expenses subsequently incurred by the indemnified party in connection with the defense thereof other than reasonable costs of investigation; provided, however, that the indemnified parties, jointly, shall have the right to employ one counsel to represent jointly the indemnified party and those other indemnified parties and their respective directors, officers, members, employees and controlling persons who may be subject to liability arising out of any claim in respect of which indemnity may be sought under this Section 8 if (i) the indemnified party and the indemnifying party shall have so mutually agreed; (ii) the indemnifying party has failed within a reasonable time to retain counsel reasonably satisfactory to the indemnified party; (iii) the indemnified party and its directors, officers, members, employees and controlling persons shall have reasonably concluded that there may be legal defenses available to them that are different from or in addition to those available to the indemnifying party; or (iv) the named parties in any such proceeding (including any impleaded parties) include both the indemnified parties or their respective directors, officers, members, employees or controlling persons, on the one hand, and the indemnifying party, on the other hand, and representation of both sets of parties by the same counsel would be inappropriate due to actual or potential differing interests between them, and in any such event the fees and expenses of such separate counsel shall be paid by the indemnifying party as incurred. No indemnifying party shall (i) without the prior written consent of the indemnified parties, settle or compromise or consent to the entry of any judgment with respect to any pending or threatened claim, action, suit or proceeding in respect of which indemnification or contribution may be sought hereunder (whether or not the indemnified parties are actual or potential parties to such claim or action) unless such settlement, compromise or consent includes an unconditional release of each indemnified party from all liability arising out of such claim, action, suit or proceeding and does not include any findings of fact or admissions of fault or culpability as to the indemnified party or (ii) be liable for any settlement of any such action effected without its written consent (which consent shall not be unreasonably withheld), but if settled with the consent of the indemnifying party or if there be a final judgment for the plaintiff in any such action, the indemnifying party agrees to indemnify and hold harmless any indemnified party from and against any loss or liability by reason of such settlement or judgment.

(d) If the indemnification provided for in this Section 8 shall for any reason be unavailable to or insufficient to hold harmless an indemnified party under Section 8(a) or 8(b) hereof in respect of any loss, claim, damage or liability, or any action in respect thereof, referred to therein, then each indemnifying party shall, in lieu of indemnifying such indemnified party, contribute to the amount paid or payable by such indemnified party as a result of such loss, claim, damage or liability, or action in respect thereof, (i) in such proportion as shall be appropriate to

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reflect the relative benefits received by the Company, on the one hand, and the Underwriters, on the other, from the offering of the Securities or (ii) if the allocation provided by clause (i) above is not permitted by applicable law, in such proportion as is appropriate to reflect not only the relative benefits referred to in clause (i) above but also the relative fault of the Company, on the one hand, and the Underwriters, on the other, with respect to the statements or omissions that resulted in such loss, claim, damage or liability, or action in respect thereof, as well as any other relevant equitable considerations. The relative benefits received by the Company, on the one hand, and the Underwriters, on the other, with respect to such offering shall be deemed to be in the same proportion as the total net proceeds from the offering of the Securities purchased under this Agreement (before deducting expenses) received by the Company, as set forth in the table on the cover page of the Prospectus, on the one hand, and the total underwriting discounts and commissions received by the Underwriters with respect to the principal amount of Securities purchased under this Agreement, as set forth in the table on the cover page of the Prospectus, on the other hand. The relative fault of the Company, on the one hand, and the Underwriters, on the other, shall be determined by reference to whether the untrue or alleged untrue statement of a material fact or omission or alleged omission to state a material fact relates to information supplied by the Company or the Underwriters, the intent of the parties and their relative knowledge, access to information and opportunity to correct or prevent such statement or omission. The Company and the Underwriters agree that it would not be just and equitable if contribution pursuant to this Section 8(d) were to be determined by pro rata allocation (even if the Underwriters were treated as one entity for such purpose) or by any other method of allocation that does not take into account the equitable considerations referred to herein. The amount paid or payable by an indemnified party as a result of the loss, claim, damage or liability, or action in respect thereof, referred to above in this Section 8(d) shall be deemed to include, for purposes of this Section 8(d), any legal or other expenses reasonably incurred by such indemnified party in connection with investigating or defending any such action or claim. Notwithstanding the provisions of this Section 8(d), no Underwriter shall be required to contribute any amount in excess of the amount by which the net proceeds from the sale of the Securities underwritten by it exceeds the amount of any damages that such Underwriter has otherwise paid or become liable to pay by reason of any untrue or alleged untrue statement or omission or alleged omission. No person guilty of fraudulent misrepresentation (within the meaning of Section 11(f) of the Securities Act) shall be entitled to contribution from any person who was not guilty of such fraudulent misrepresentation. The Underwriters’ obligations to contribute as provided in this Section 8(d) are several in proportion to their respective underwriting obligations and not joint.

(e) The Underwriters severally confirm, and the Company acknowledges and agrees, that the statements set forth in the first and second sentences in the first paragraph under the caption “Underwriting (Conflicts of Interest)—Commissions and Discounts,” the third and fourth sentences in the first paragraph under the caption “Underwriting (Conflicts of Interest)—New Issue of Notes” and the first and second paragraphs under the caption “Underwriting (Conflicts of Interest)—Short Positions” in the Preliminary Prospectus and the Prospectus are correct and constitute the only information concerning such Underwriters furnished in writing to the Company by or on behalf of the Underwriters specifically for inclusion in the Preliminary Prospectus, the Prospectus, any Issuer Free Writing Prospectus, or any amendment or supplement thereto.

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9. Termination.

(a) The obligations of the Underwriters hereunder may be terminated by the Representatives by written notice given to and received by the Company prior to delivery of and payment for the Securities if, prior to that time, any of the events described in Sections 7(j), 7(k) and 7(l) hereof shall have occurred, or if the Underwriters shall decline to purchase the Securities for any reason permitted under this Agreement.

(b) If this Agreement is terminated by the Representatives in accordance with the provisions of Section 7 or Section 10, the Company shall, subject to the limitations set forth in Section 11, reimburse the Underwriters for all their out-of-pocket expenses, including the reasonable fees and disbursements of counsel for the Underwriters.

10. Default of One or More of the Several Underwriters. If, on the Closing Date, any one or more of the several Underwriters shall fail or refuse to purchase Securities that it or they have agreed to purchase hereunder on such date, and the aggregate principal amount which such defaulting Underwriter or Underwriters agreed but failed or refused to purchase does not exceed 10% of the aggregate principal amount of the Securities to be purchased on such date, the other Underwriters shall be obligated, severally, in the proportions that the principal amount of Securities set forth opposite their respective names on Schedule 1 bears to the aggregate principal amount of Securities set forth opposite the names of all such non-defaulting Underwriters, or in such other proportions as may be specified by the Representatives with the consent of the non-defaulting Underwriters, to purchase the Securities which such defaulting Underwriter or Underwriters agreed but failed or refused to purchase on such date. If, on the Closing Date, any one or more of the Underwriters shall fail or refuse to purchase Securities and the aggregate principal amount of Securities with respect to which such default occurs exceeds 10% of the aggregate principal amount of Securities to be purchased on such date, and arrangements satisfactory to the Representatives and the Company for the purchase of such Securities are not made within 48 hours after such default, this Agreement shall terminate without liability of any party to any other party except that the provisions of Section 6, Section 8, and Section 11 hereof shall at all times be effective and shall survive such termination. In any such case, either the Representatives or the Company shall have the right to postpone the Closing Date, but in no event for longer than seven days in order that the required changes, if any, to the Registration Statement and the Prospectus or any other documents or arrangements may be effected.

As used in this Agreement, the term “Underwriter” shall be deemed to include any person substituted for a defaulting Underwriter under this Section 10. Any action taken under this Section 10 shall not relieve any defaulting Underwriter from liability in respect of any default of such Underwriter under this Agreement.

11. Reimbursement of Underwriters’ Expenses. If (a) the Company shall fail to tender the Securities for delivery to the Underwriters by reason of any failure, refusal or inability on the part of the Company to perform any agreement to be performed on its part hereunder, or because any other condition of the obligations hereunder required to be fulfilled by the Company is not fulfilled for any reason, or (b) the Underwriters shall decline to purchase the Securities for any reason permitted under this Agreement, the Company will reimburse the Underwriters for all reasonable out-of-pocket expenses (including reasonable fees and disbursements of one counsel)

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not to exceed $250,000 incurred by the Underwriters in connection with this Agreement and the proposed purchase of the Securities and upon demand the Company shall pay the full amount thereof to the Representatives; provided, however, that in no event shall the Company be obligated to reimburse the out-of-pocket expenses of any defaulting Underwriter referred to in Section 10 hereof or any Underwriter found to be in breach of this Agreement as of the Applicable Time.

12. Research Analyst Independence. The Company acknowledges that the Underwriters’ research analysts and research departments are required to be independent from their respective investment banking divisions and are subject to certain regulations and internal policies, and that such Underwriters’ research analysts may hold views and make statements or investment recommendations and/or publish research reports with respect to the Company and/or the offering that differ from the views of their respective investment banking divisions. The Company hereby waives and releases, to the fullest extent permitted by law, any claims that the Company may have against the Underwriters with respect to any conflict of interest that may arise from the fact that the views expressed by their independent research analysts and research departments may be different from or inconsistent with the views or advice communicated to the Company by such Underwriters’ investment banking divisions. The Company acknowledges that each of the Underwriters is a full service securities firm and as such from time to time, subject to applicable securities laws, may effect transactions for its own account or the account of its customers and hold long or short positions in debt or equity securities of the Company.

13. No Fiduciary Duty. The Company acknowledges and agrees that in connection with this offering, sale of the Securities or any other services the Underwriters may be deemed to be providing hereunder, notwithstanding any preexisting relationship, advisory or otherwise, between the parties or any oral representations or assurances previously or subsequently made by the Underwriters: (i) no fiduciary or agency relationship between the Company and any other person, on the one hand, and the Underwriters, on the other, exists; (ii) the Underwriters are not acting as advisors, expert or otherwise, to the Company, including, without limitation, with respect to the determination of the public offering price of the Securities, and such relationship between the Company, on the one hand, and the Underwriters, on the other, is entirely and solely commercial, based on arms-length negotiations; (iii) any duties and obligations that the Underwriters may have to the Company shall be limited to those duties and obligations specifically stated herein; and (iv) the Underwriters and their respective affiliates may have interests that differ from those of the Company. The Company hereby waives any claims that the Company may have against the Underwriters with respect to any breach of fiduciary duty in connection with this offering. Any review by the Underwriters of the Company, the transactions contemplated hereby or other matters relating to such transactions will be performed solely for the benefit of the Underwriters and shall not be on behalf of the Company.

14. Notices, Etc. All statements, requests, notices and agreements hereunder shall be in writing, and:

(a) if to the Underwriters, shall be delivered or sent by mail to KeyBanc Capital Markets Inc., 127 Public Square, 4th Floor, Cleveland, OH 44114, Attention: Debt Capital Markets, Facsimile: (216) 689-0976; MUFG Securities Americas Inc., 1221 Avenue of the Americas, 6th Floor, New York, NY 10020-1001, Attention: Capital Markets Group, Facsimile:

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(646) 434-3455; TD Securities (USA) LLC, 31 W. 52nd Street, 2nd Floor, New York, NY 10019, Attention: Transaction Management Group, Email: ustmg@tdsecurities.com; and U.S. Bancorp Investments, Inc., 214 N. Tryon St., 26th Floor, Charlotte, NC 28202, Attention: Credit Fixed Income, Facsimile: (704) 335-2393; and

(b) if to the Company, shall be delivered or sent by mail or facsimile transmission to Southwest Gas Corporation, 5241 Spring Mountain Road, P.O. Box 98510, Las Vegas, Nevada 89193, Attention: Treasurer, with a copy (which shall not constitute notice) to Brandon C. Parris, Esq., Morrison & Foerster LLP, 425 Market Street, San Francisco, California 94105.

Any such statements, requests, notices or agreements shall take effect at the time of receipt thereof. The Company shall be entitled to act and rely upon any request, consent, notice or agreement given or made on behalf of the Underwriters by the Representatives.

15. Persons Entitled to Benefit of Agreement. This Agreement shall inure to the benefit of and be binding upon the Underwriters, the Company, and their respective successors. This Agreement and the terms and provisions hereof are for the sole benefit of only those persons, except that (A) the representations, warranties, indemnities and agreements of the Company contained in this Agreement shall also be deemed to be for the benefit of the affiliates, directors, officers, members and employees of the Underwriters and each person or persons, if any, who control any Underwriter within the meaning of Section 15 of the Securities Act and (B) the indemnity agreement of the Underwriters contained in Section 8(b) hereof shall be deemed to be for the benefit of the directors of the Company, the officers of the Company who have signed the Registration Statement and any person controlling the Company within the meaning of Section 15 of the Securities Act. Nothing in this Agreement is intended or shall be construed to give any person, other than the persons referred to in this Section 15, any legal or equitable right, remedy or claim under or in respect of this Agreement or any provision contained herein.

16. Survival. The respective indemnities, representations, warranties and agreements of the Company and the Underwriters contained in this Agreement or made by or on behalf of them, respectively, pursuant to this Agreement, shall survive the delivery of and payment for the Securities and shall remain in full force and effect, regardless of any investigation made by or on behalf of any of them or any indemnified party referred to in Section 8 hereof.

17. Recognition of the U.S. Special Resolution Regimes.

(a) In the event that any Underwriter that is a Covered Entity becomes subject to a proceeding under a U.S. Special Resolution Regime, the transfer from such Underwriter of this Agreement, and any interest and obligation in or under this Agreement, will be effective to the same extent as the transfer would be effective under the U.S. Special Resolution Regime if this Agreement, and any such interest and obligation, were governed by the laws of the United States or a state of the United States.

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(b) In the event that any Underwriter that is a Covered Entity or a BHC Act Affiliate of such Underwriter becomes subject to a proceeding under a U.S. Special Resolution Regime, Default Rights under this Agreement that may be exercised against such Underwriter are permitted to be exercised to no greater extent than such Default Rights could be exercised under the U.S. Special Resolution Regime if this Agreement were governed by the laws of the United States or a state of the United States.

For purposes of this Section 17: (i) a “BHC Act Affiliate” has the meaning assigned to the term “affiliate” in, and shall be interpreted in accordance with, 12 U.S.C. § 1841(k); (ii) a “Covered Entity” means any of the following: (A) a “covered entity” as that term is defined in, and interpreted in accordance with, 12 C.F.R. § 252.82(b); (B) “covered bank” as that term is defined in, and interpreted in accordance with, 12 C.F.R. § 47.3(b); or (C) a “covered FSI” as that term is defined in, and interpreted in accordance with, 12 C.F.R. § 382.2(b); (iii) “Default Right” has the meaning assigned to that term in, and shall be interpreted in accordance with, 12 C.F.R. §§ 252.81, 47.2 or 382.1, as applicable; and (iv) “U.S. Special Resolution Regime” means each of (A) the Federal Deposit Insurance Act and the regulations promulgated thereunder and (B) Title II of the Dodd-Frank Wall Street Reform and Consumer Protection Act and the regulations promulgated thereunder.

18. Definition of the Terms “Business Day” and “Subsidiary.” For purposes of this Agreement, (a) “business day” means each Monday, Tuesday, Wednesday, Thursday or Friday that is not a day on which banking institutions in New York are generally authorized or obligated by law or executive order to close and (b) “subsidiary” has the meaning set forth in Rule 405 of the Rules and Regulations.

19. Governing Law. This Agreement shall be governed by and construed in accordance with the laws of the State of New York, without regard to the conflicts of laws rules of such state.

20. Waiver of Jury Trial. THE COMPANY AND THE UNDERWRITERS HEREBY WAIVE ALL RIGHT TO TRIAL BY JURY IN ANY PROCEEDING (WHETHER BASED UPON CONTRACT, TORT OR OTHERWISE) IN ANY WAY ARISING OUT OF OR RELATING TO THIS AGREEMENT. The Company and the Underwriters agree that a final judgment in any such proceeding brought in any court shall be conclusive and binding upon the Company and the Underwriters, as applicable, and may be enforced in any other courts in the jurisdiction of which the Company or the Underwriters are or may be subject, by suit upon such judgment.

21. Counterparts. This Agreement may be executed in one or more counterparts and, if executed in more than one counterpart, the executed counterparts shall each be deemed to be an original but all such counterparts shall together constitute one and the same instrument.

22. Headings. The headings herein are inserted for convenience of reference only and are not intended to be part of, or to affect the meaning or interpretation of, this Agreement.

[Signature page follows]

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If the foregoing correctly sets forth the agreement between the Company and the Underwriters, please indicate your acceptance in the space provided for that purpose below.

Signature Page

Accepted:

For themselves and as Representatives of the Underwriters named in Schedule 1 hereto

Signature Page

SCHEDULE 1

SCHEDULE 2

PRICING INFORMATION

Southwest Gas Corporation

$450,000,000 2.200% SENIOR NOTES DUE 2030

Final Term Sheet

June 1, 2020

It is expected that delivery of the Notes will occur on or about June 4, 2020 which will be the third business day following the initial date of trading of the Notes (such settlement cycle being referred to as (“T+3”)). Under applicable rules and regulations, trades in the secondary market generally are required to settle in two business days, unless the parties to any such trade expressly agree otherwise. Accordingly, purchasers who wish to trade the Notes on the date hereof will be required, by virtue of the fact that the Notes initially will settle in T+3, to specify an alternate settlement cycle at the time of any such trade to prevent a failed settlement. Purchasers of Notes who wish to trade Notes on the date hereof should consult their own advisor.

The issuer has filed a registration statement on December 13, 2017 (including a prospectus dated December 13, 2017) and a preliminary prospectus supplement, dated June 1, 2020 (the “Preliminary Prospectus Supplement”), with the Securities and Exchange Commission (“SEC”) for the offering to which this communication relates. Before you invest, you should read the Preliminary Prospectus Supplement, the accompanying prospectus in that registration statement and other documents the issuer has filed with the SEC for more complete information about the issuer and this offering. These documents are publicly available by visiting EDGAR on the SEC web site at www.sec.gov. Alternatively, the issuer, any underwriter or any dealer participating in the offering will arrange to send you the Preliminary Prospectus Supplement if you request it by calling KeyBanc Capital Markets Inc. toll free at 1-866-227-6479, MUFG Securities Americas Inc. toll free at 1-877-649-6848, TD Securities (USA) LLC toll free at 1-855-495-9846 or U.S. Bancorp Investments, Inc. toll free at 1-877-558-2607.

SCHEDULE 3

LIST OF SUBSIDIARIES

Exhibit 4.1

SOUTHWEST GAS CORPORATION,

as Issuer

and

The Bank of New York Mellon Trust Company, N.A.,

as Trustee

INDENTURE

Dated as of June 4, 2020

DEBT SECURITIES

CROSS-REFERENCE TABLE

Certain Sections of this Indenture relating to Sections 310 through 318, inclusive, of the Trust Indenture Act of 1939, as amended:

Note: This Cross-Reference Table shall not, for any purpose, be deemed to be part of this Indenture.

TABLE OF CONTENTS

-i-

TABLE OF CONTENTS

(continued)

-ii-

TABLE OF CONTENTS

(continued)

-iii-

INDENTURE, dated as of June 4, 2020, between Southwest Gas Corporation, a California corporation (the “Company”), and The Bank of New York Mellon Trust Company, N.A., a national banking association, as Trustee (the “Trustee”).

RECITALS OF THE COMPANY

WHEREAS, the Company has duly authorized the execution and delivery of this Indenture to provide for the issuance from time to time of the Company’s unsecured senior debt securities in one or more series (the “Notes”) of substantially the tenor hereinafter provided, and to provide the terms and conditions upon which the Notes are to be authenticated, issued and delivered; and

WHEREAS, all things necessary to make the Notes, when executed by the Company and authenticated and delivered hereunder and duly issued by the Company, the valid obligations of the Company, and to make this Indenture a valid agreement of the Company, in accordance with its terms, have been done.

NOW, THEREFORE, THIS INDENTURE WITNESSETH:

For and in consideration of the premises and the purchase of the Notes by the Holders thereof, it is mutually agreed, for the equal and proportionate benefit of all Holders of the Notes or of a series thereof, as follows:

ARTICLE 1

DEFINITIONS AND INCORPORATION BY REFERENCE

Section 1.01.    Definitions.

“Additional Notes” means Notes of a series issued from time to time after the initial Issue Date for such series under the terms of this Indenture (other than pursuant to Sections 2.06, 2.08, 2.10, 3.06 and 9.04 of this Indenture, in the case of Notes of any series that are not already Additional Notes of such series).

“Board of Directors” means, with respect to any Person, the Board of Directors of such Person, any management committee of such Person or any committee thereof duly authorized to act on behalf of such Board of Directors or such management committee.

“Board Resolution” means a copy of a resolution certified by the Secretary or an Assistant Secretary of the Company to have been duly adopted by the Board of Directors of the Company, and to be in full force and effect on the date of such certification, and delivered to the Trustee.

“Business Day” means any day other than a Saturday, a Sunday or a day on which banking institutions or trust companies in New York City are authorized or required by law, regulation or executive order to close.

“Capital Stock” means, with respect to any Person, any and all shares, interests, rights to purchase, warrants, options, participations or other equivalents of or interests in (however designated) equity of such Person, including any preferred stock, partnership interests and limited liability company membership interests, but excluding any debt securities convertible into such equity.

“Code” means the U.S. Internal Revenue Code of 1986, as amended.

“Company” means the Person named as the “Company” in the preamble to this Indenture until a successor Corporation shall have succeeded to such Person pursuant to the applicable provisions of this Indenture, and thereafter, the “Company” shall mean such successor Corporation.

“Corporate Trust Office” means the office of the Trustee at which, at any particular time, this Indenture shall be principally administered; which office at the date of the execution of this Indenture is located at 2 N. LaSalle Street, 7th Floor, Chicago, Illinois 60602, Attention: Corporate Trust Administration, or at any other time at such other address as the Trustee may designate from time to time by written notice to the Holders.

“Corporation” means a corporation, association, company, joint stock company or business trust.

“Default” means any event that is, or after notice or passage of time or both would be, an Event of Default.

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“DTC” means The Depository Trust Company, its nominees and their respective successors and assigns.

“Exchange Act” means the Securities Exchange Act of 1934, as amended, and the rules and regulations promulgated by the SEC thereunder.

“GAAP” means generally accepted accounting principles in the United States of America in effect from time to time.

“guarantee” means any obligation, contingent or otherwise, of any Person directly or indirectly guaranteeing any Indebtedness of any other Person and any obligation, direct or indirect, contingent or otherwise, of such Person (1) to purchase or pay (or advance or supply funds for the purchase or payment of) such Indebtedness of such other Person (whether arising by virtue of partnership arrangements, or by agreements to keep well, to purchase assets, goods, securities or services, to take or pay or to maintain financial statement conditions or otherwise) or (2) entered into for purposes of assuring in any other manner the obligee of such Indebtedness of the payment thereof or to protect such obligee against loss in respect thereof (in whole or in part); provided, however, that the term “guarantee” will not include endorsements for collection or deposit in the ordinary course of business. The term “guarantee,” when used as a verb, has a correlative meaning.

“guarantor” means any Person that guarantees the Notes.

“Holder” or “Noteholder” means the Person in whose name a Note is registered on the security register books of the Registrar.

“incur” means issue, assume, guarantee or otherwise become liable for.

“Indebtedness” means, with respect to any Person, obligations of such Person for borrowed money (including, without limitation, indebtedness for borrowed money evidenced by notes, bonds, debentures or similar instruments).

“Indenture” means this Indenture, as further amended or supplemented from time to time.

“Interest Payment Date” means as to each series of Notes the Stated Maturity of an installment of interest on such Notes.

“Issue Date” means, with respect to a series of Notes, the date on which Notes of such series are issued.

“Officer” means the Chief Executive Officer, President, the Controller, the Chief Operating Officer, any Vice President, the Treasurer, the Assistant Treasurer, the Chief Financial Officer, the Chief Accounting Officer, the General Counsel, the Secretary or the Assistant Secretary, as applicable.

“Officers’ Certificate” means a certificate signed by any two Officers of the Company.

“Opinion of Counsel” means a written opinion, reasonably acceptable to the Trustee, from legal counsel to the Company. The counsel may be an employee of the Company. Opinions of Counsel required to be delivered under this Indenture may have qualifications customary for opinions of the type required and counsel delivering such Opinions of Counsel may rely on certificates of the Company or governmental or other officials customary for opinions of the type required, including certificates certifying as to matters of fact.

“Person” means any individual, Corporation, limited liability company, partnership, joint venture, trust, unincorporated organization or government or any agency or political subdivision thereof.

“principal” means the principal of the Notes of each series plus the premium, if any, payable on the Notes of each series that is due or overdue or is to become due at the relevant time; provided, however, that for purposes of calculating any such premium, the term “principal” shall not include the premium with respect to which such calculation is being made.

“Redemption Date” shall mean the date specified for redemption of the Notes of any series in accordance with the terms of the Notes of such series and Section 3.01.

“SEC” means the Securities and Exchange Commission or any successor agency.

“Securities Act” means the Securities Act of 1933, as amended, and the rules and regulations promulgated by the SEC thereunder.

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“Securities Custodian” means the custodian with respect to a Global Note (as appointed by DTC) or any successor Person thereto and shall initially be the Trustee.

“Stated Maturity” means, with respect to any Note, the date specified in such security as the fixed date on which the payment of principal of such Note is due and payable, including pursuant to any mandatory redemption provision (but excluding any provision providing for the repurchase of such security at the option of the holder thereof until the exercise of such option by such holder).

“Subsidiary” means, with respect to any Person (the “parent”) at any date, any corporation, limited liability company, partnership, association or other entity the accounts of which would be consolidated with those of the parent in the parent’s consolidated financial statements if such financial statements were prepared in accordance with GAAP as of that date, as well as any other corporation, limited liability company, partnership, association or other entity of which securities or other ownership interests representing more than 50% of the equity or more than 50% of the ordinary voting power or, in the case of a partnership, more than 50% of the general partnership interests are, as of that date, owned, controlled or held by the parent or one or more Subsidiaries of the parent or by the parent and one or more Subsidiaries of the parent.

“Trust Indenture Act” means the U.S. Trust Indenture Act of 1939, as amended (15 U.S.C. §§ 77aaa-77bbbb), as in effect on the date of this Indenture; provided, however, that in the event the Trust Indenture Act of 1939 is amended after such date, “Trust Indenture Act” means, to the extent required by any such amendments, the U.S. Trust Indenture Act of 1939, as so amended.

“Trustee” means the party named as such in the preamble to this Indenture until a successor replaces it in accordance with the applicable provisions of this Indenture and, thereafter, means such successor.

“Trust Officer” shall mean, when used with respect to the Trustee, any officer within the corporate trust department of the Trustee, including any vice president, assistant vice president, assistant secretary, trust officer or any other officer of the Trustee who customarily performs functions similar to those performed by the persons who at the time shall be such officers, respectively, or to whom any corporate trust matter is referred because of such person’s knowledge of and familiarity with the particular subject and who shall have direct responsibility for the administration of this Indenture.

“Uniform Commercial Code” means the New York Uniform Commercial Code as in effect from time to time.

“United States” and “U.S.” means the United States of America.

“U.S. Government Obligations” means direct obligations (or certificates representing an ownership interest in such obligations) of the United States of America (including any agency or instrumentality thereof) for the payment of which the full faith and credit of the United States of America is pledged and that are not callable or redeemable at the Company’s option.

“Voting Stock” of any specified “person” (as that term is used in Section 13(d)(3) of the Exchange Act) as of any date means the Capital Stock of such person that is at the time entitled to vote generally in the election of the Board of Directors of such person.

Section 1.02. Other Definitions.

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Section 1.03. Incorporation by Reference of Trust Indenture Act. This Indenture is subject to the mandatory provisions of the Trust Indenture Act which are incorporated by reference in and made a part of this Indenture. The following terms in the Trust Indenture Act have the following meanings:

“indenture securities” means the Notes.

“indenture security holder” means a Holder or Noteholder.

“indenture to be qualified” means this Indenture.

“indenture trustee” or “institutional trustee” means the Trustee.

“obligor” on the indenture securities means the Company and any other obligor on the indenture securities, including any guarantor.

All other terms used in this Indenture that are defined by the Trust Indenture Act, defined by reference to another statute or defined by SEC rule have the meanings assigned to them by such definitions.

Section 1.04. Rules of Construction. For purposes of this Indenture, except as otherwise expressly provided herein or unless the context otherwise requires:

(i) all terms used in this Indenture that are not defined herein and that are used as defined by the Trust Indenture Act, defined by reference to another statute or defined by SEC rule have the meanings assigned to them by such definitions;

(ii) a term has the meaning assigned to it;

(iii) an accounting term not otherwise defined has the meaning assigned to it in accordance with GAAP;

(iv) “including” means including without limitation;

(v) words in the singular include the plural and words in the plural include the singular;

(vi) all references to Notes of any series shall refer also to any Additional Notes of such series issued in the form of Notes of such series pursuant to Section 2.14;

(vii) all references to the date the Notes of any series were originally issued shall refer to the Issue Date or the date any Additional Notes of any series were originally issued, as the case may be; and

(viii) all references herein to particular Sections or Articles shall refer to this Indenture unless otherwise so indicated.

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ARTICLE 2

THE NOTES

Section 2.01. Form, Dating, Title and Terms.

(a) Form of Notes. The Notes of each series shall be substantially in the form attached as Exhibit A, or in such other form or forms as shall be established by or pursuant to a Board Resolution or in one or more indentures supplemental hereto, in each case with such appropriate provisions as are required or permitted by this Indenture, and may have such letters, numbers or other marks of identification and such legends or endorsements placed thereon as may be required to comply with applicable laws or the rules of any securities exchange or DTC or as may, consistently herewith, be determined by the Officers of the Company executing such Notes, as evidenced by their execution thereof. If the form of Notes of any series is established by action taken pursuant to a Board Resolution, a copy of an appropriate record of such action shall be certified by the Secretary or an Assistant Secretary of the Company and delivered to the Trustee at or prior to the delivery of the Authentication Order contemplated by Section 2.02 with respect to the authentication and delivery of such Notes.

The Trustee’s certificate of authentication shall be substantially in the form set forth in this Article.

The Definitive Notes shall be printed, lithographed or engraved on a steel engraved border or on steel engraved borders or produced by any combination of these methods, if required by any securities exchange on which the Notes may be listed, or may be produced in any other manner permitted by the rules of any securities exchange on which the Notes may be listed, all as determined by the Officers of the Company executing such Notes, as evidenced by their execution of such Notes.

The Notes of each series shall be issued on the Issue Date therefor in the form of a permanent global Note (each, a “Global Note” and, collectively, the “Global Notes”), deposited with the Trustee, as custodian for DTC, duly executed by the Company, authenticated by the Trustee as hereinafter provided and dated the date of their authentication. Each Global Note may be represented by more than one certificate, if so required by DTC’s rules regarding the maximum principal amount to be represented by a single certificate. The aggregate principal amount of the Global Notes may from time to time be increased or decreased by adjustments made on the records of the Trustee, as custodian for DTC or its nominee, as hereinafter provided.

The principal of and interest on the Notes shall be payable at the office or agency of the Company maintained for such purpose in Las Vegas, Nevada, or at such other office or agency of the Company as may be maintained for such purpose pursuant to Section 2.03; provided, however, that at the option of the Company, each installment of interest may be paid by (i) check mailed to addresses of the Persons entitled thereto as such addresses shall appear on the Note Register or (ii) upon request of any Holder of at least $1,000,000 principal amount of Notes, wire transfer to an account located in the United States of America maintained by the payee. Payments in respect of Notes represented by a Global Note (including principal, premium, if any, and interest) shall be made by wire transfer of immediately available funds to the accounts specified by DTC.

(b) Denominations. The Notes shall be issuable only in fully registered form, without coupons, and only in denominations of $2,000 and any integral multiple of $1,000 in excess thereof.

(c) Legend for Global Notes. The Global Notes shall bear the following legend on the face thereof:

“UNLESS THIS CERTIFICATE IS PRESENTED BY AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY, A NEW YORK CORPORATION (“DTC”), TO THE COMPANY OR ITS AGENT FOR REGISTRATION OF TRANSFER, EXCHANGE OR PAYMENT, AND ANY CERTIFICATE ISSUED IS REGISTERED IN THE NAME OF CEDE & CO. OR IN SUCH OTHER NAME AS IS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF DTC (AND ANY PAYMENT IS MADE TO CEDE & CO. OR TO SUCH OTHER ENTITY AS IS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF DTC), ANY TRANSFER, PLEDGE OR OTHER USE HEREOF FOR VALUE OR OTHERWISE BY OR TO ANY PERSON IS WRONGFUL INASMUCH AS THE REGISTERED OWNER HEREOF, CEDE & CO., HAS AN INTEREST HEREIN. TRANSFERS OF THIS GLOBAL SECURITY SHALL BE LIMITED TO TRANSFERS IN WHOLE, BUT NOT IN PART, TO NOMINEES OF DTC OR TO A SUCCESSOR THEREOF OR SUCH SUCCESSOR’S NOMINEE AND TRANSFERS OF PORTIONS OF THIS GLOBAL SECURITY SHALL BE LIMITED TO TRANSFERS MADE IN ACCORDANCE WITH THE RESTRICTIONS SET FORTH IN THE INDENTURE REFERRED TO ON THE REVERSE HEREOF.”

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(d) Book-Entry Provisions.

(i) This Section 2.01(d) shall apply only to Global Notes deposited with the Trustee, as custodian for DTC.

(ii) Each Global Note initially shall (x) be registered in the name of DTC or the nominee of DTC, (y) be delivered to the Trustee as custodian for DTC and (z) bear the legend set forth in Section 2.01(c).

(iii) Members of, or participants in, DTC (“Agent Members”) shall have no rights under this Indenture with respect to any Global Note held on their behalf by DTC or by the Trustee as the custodian of DTC or under such Global Note, and DTC shall be treated by the Company, the Trustee and any agent of the Company or the Trustee as the absolute owner of such Global Note for all purposes whatsoever. Notwithstanding the foregoing, nothing herein shall (x) prevent the Company, the Trustee or any agent of the Company or the Trustee from giving effect to any written certification, proxy or other authorization furnished by DTC, or (y) impair, as between DTC and its Agent Members, the operation of customary practices of DTC governing the exercise of the rights of a holder of a beneficial interest in any Global Note.

(iv) In connection with any transfer of a portion of the beneficial interest in a Global Note pursuant to subsection (e) of this Section 2.01 to beneficial owners who are required to hold Definitive Notes, the Securities Custodian shall reflect on its books and records the date and a decrease in the principal amount of such Global Note in an amount equal to the principal amount of the beneficial interest in the Global Note to be transferred, and the Company shall execute, and the Trustee shall authenticate and deliver, one or more Definitive Notes of the relevant series of like tenor and amount.

(v) In connection with the transfer of an entire Global Note to beneficial owners pursuant to subsection (e) of this Section 2.01, such Global Note shall be deemed to be surrendered to the Trustee for cancellation, and the Company shall execute, and the Trustee shall authenticate and deliver, to each beneficial owner identified by DTC in exchange for its beneficial interest in such Global Note, an equal aggregate principal amount of Definitive Notes of the relevant series of authorized denominations.

(vi) The registered holder of a Global Note may grant proxies and otherwise authorize any Person, including Agent Members and Persons that may hold interests through Agent Members, to take any action that a Holder is entitled to take under this Indenture or the Notes.

(e) Definitive Notes. Except as provided below, owners of beneficial interests in a Global Note shall not be entitled to have Notes represented by the Global Note registered in their name or to receive certificated Notes (“Definitive Notes”). If required to do so pursuant to any applicable law or regulation, beneficial owners may obtain Definitive Notes in exchange for their beneficial interests in a Global Note upon written request in accordance with DTC’s and the Registrar’s procedures. In addition, Definitive Notes shall be transferred to all beneficial owners in exchange for their beneficial interests in a Global Note if (x) DTC notifies the Company that it is unwilling or unable to continue as depository for such Global Note or DTC ceases to be a clearing agency registered under the Exchange Act, at a time when DTC is required to be so registered in order to act as depository, and in each case a successor depository is not appointed by the Company within 90 days of such notice, (y) the Company executes and delivers to the Trustee and Registrar an Officers’ Certificate stating that such Global Note shall be so exchangeable or (z) an Event of Default has occurred and is continuing with respect to the Notes of a series and the Registrar has received a request from DTC to exchange the Global Note for such series for Definitive Notes of such series.

(f) Certificate of Authentication. The Trustee’s certificates of authentication shall be in substantially the following form:

TRUSTEE’S CERTIFICATE OF

AUTHENTICATION

This is one of the Notes referred

to in the within-mentioned Indenture.

The Bank of New York Mellon Trust Company, N.A.,

as Trustee

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(g) Title and Terms. The aggregate principal amount of Notes which may be authenticated and delivered under this Indenture is unlimited.

The Notes may be issued in one or more series. There shall be established in or pursuant to a Board Resolution, and set forth in an Officers’ Certificate, or established in one or more indentures supplemental hereto, prior to the issuance of Notes of a series:

(i) the title of the Notes of such series, which shall distinguish the Notes of the series from all other Notes;

(ii) the limit, if any, upon the aggregate principal amount of the Notes of such series that may be authenticated and delivered under this Indenture (except for Notes authenticated and delivered upon registration or transfer of, or in exchange for, or in lieu of, other Notes of the same series pursuant to Sections 2.06, 2.08, 2.10 or 3.06 except for any Notes that, pursuant to Section 2.02, are deemed never to have been authenticated and delivered hereunder); provided, however, that except as otherwise specified as contemplated by this Section 2.01 with respect to the Notes of any series, the authorized aggregate principal amount of such series may be increased above such amount by a Board Resolution to such effect;

(iii) the Stated Maturity or Stated Maturities on which the principal of the Notes of such series is payable or the method of determination thereof;

(iv) the rate or rates, if any, at which the Notes of such series shall bear interest or the method of determining such rate or rates, the Interest Payment Dates on which such interest shall be payable, the right, if any, of the Company to defer or extend an Interest Payment Date with respect to such interest, the regular record date (if other than as defined in this Indenture) for the interest payable on any Interest Payment Date with respect to such interest and the dates from which such interest shall accrue and the method of determining these dates;

(v) the place or places where the principal of (and premium, if any) and interest on the Notes of such series shall be payable, the place or places where the Notes of such series may be presented for registration of transfer or exchange, and the place or places where notices and demands to or upon the Company in respect of the Notes of such series may be made;

(vi) the period or periods within or the date or dates on which, if any, the price or prices at which and the terms and conditions upon which the Notes of such series may be redeemed or prepaid, in whole or in part, at the option of the Company;

(vii) the obligation or the right, if any, of the Company to redeem, repay or purchase the Notes of such series, including pursuant to any sinking fund, purchase fund, amortization or analogous provisions, or at the option of a Holder thereof and the period or periods within which, the price or prices at which, the currency or currencies (including currency unit or units) in which and the other terms and conditions upon which Notes of the series shall be redeemed, repaid or purchased, in whole or in part, pursuant to such obligation or right;

(viii) the denominations in which any Notes of such series shall be issuable, if other than denominations set forth in Section 2.01(b);

(ix) the additions, modifications or deletions, if any, in the Events of Default or covenants of the Company set forth herein or to Section 9.01 or Section 9.02, in each case with respect to the Notes of such series;

(x) if other than the principal amount thereof, the portion of the principal amount of Notes of such series that shall be payable upon declaration of acceleration of the Stated Maturity thereof;

(xi) the additions or changes, if any, to this Indenture with respect to the Notes of such series as shall be necessary to permit or facilitate the issuance of the Notes of such series in bearer form, registrable or not registrable as to principal, and with or without interest coupons;

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(xii) any index or indices used to determine the amount of payments of principal of and premium, if any, on the Notes of such series or the manner in which such amounts will be determined;

(xiii) the issuance of a temporary Note (which may include a Global Note) representing all of the Notes of such series and the terms upon which such temporary Global Note may be exchanged for Definitive Notes of such series;

(xiv) whether the Notes of the series shall be issued in whole or in part in the form of one or more Global Notes and, in such case, the identity of the depositary for such Global Notes if not DTC and the legends to be placed on such Global Notes;

(xv) the appointment of any Paying Agent or Paying Agents for the Notes of such series;

(xvi) the obligations of the Company in addition to those set forth in Article 8 (if any) that shall not be extinguished upon the discharge or defeasance of the Notes of such series pursuant to Article 8 and any different rights or obligations attendant a discharge or defeasance of the Notes of such series;

(xvii) whether the Notes of any series are to be guaranteed, and if so, the names of the guarantors of the Notes of such series and the terms of the guarantees of the Notes of such series;

(xviii) whether the Notes of such series or any guarantees of such Notes are to be secured by any property, assets or other collateral and, if so, the applicable collateral, any deletions from, or modifications or additions to, the provisions of this Indenture in connection therewith or in connection with any other instrument or agreement entered into in connection therewith;

(xix) the terms and conditions of any right or obligation on the part of the Company, or any option on the part of the Holders, to convert or exchange Notes of such series into cash or any other securities or property of the Company or any other Person, and the additions or changes, if any, to this Indenture with respect to the Notes of such series to permit or facilitate such conversion or exchange; and

(xx) any other terms of the Notes of such series (which terms shall not be inconsistent with the provisions of this Indenture, except to the extent otherwise permitted by Section 9.01).

All Notes of any one series shall be substantially identical except as to denomination and except as may otherwise be provided herein or in or pursuant to such Board Resolution and set forth in such Officers’ Certificate or in any such indenture supplemental hereto.

If any of the terms of Notes of any series are established by action taken pursuant to a Board Resolution, a copy of an appropriate record of such action shall be certified by the Secretary or an Assistant Secretary of the Company and delivered to the Trustee at or prior to the delivery of the Authentication Order contemplated by Section 2.02 with respect to the authentication and delivery of such Notes.

Section 2.02. Execution and Authentication. An Officer of the Company shall sign the Notes for the Company by manual signature.

If an Officer of the Company whose signature is on a Note no longer holds that office at the time the Trustee authenticates the Note, the Note shall be valid nevertheless.

A Note shall not be valid until an authorized signatory of the Trustee manually authenticates the Note. The signature of the Trustee on a Note shall be conclusive evidence that such Note has been duly and validly authenticated and issued under this Indenture.

At any time and from time to time after the execution and delivery of this Indenture, the Company may deliver Notes of any series executed by the Company to the Trustee for authentication. Each Note shall be dated the date of its authentication. The Trustee shall authenticate Notes for original issue upon receipt of, and shall be fully protected in relying upon:

(a) An order to the Trustee signed by an Officer of the Company directing the Trustee to authenticate the Notes (an “Authentication Order”);

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(b) a copy of the resolution or resolutions of the Board of Directors in or pursuant to which the terms and form of the Notes were established, certified by the Secretary or an Assistant Secretary of the Company to have been duly adopted by the Board of Directors and to be in full force and effect as of the date of such certificate, and if the terms and form of such Notes are established by an Officers’ Certificate pursuant to general authorization of the Board of Directors, such Officers’ Certificate;

(c) a supplemental indenture, if any;

(d) an Officers’ Certificate of the Company delivered in accordance with Section 10.03; and

(e) an Opinion of Counsel delivered in accordance with Section 10.03, and that states that such Notes, when authenticated and delivered by Trustee and issued by the Company in the manner and subject to any conditions specified in such Opinion of Counsel, will constitute legal, valid and binding obligations of the Company, enforceable in accordance with their terms, subject to bankruptcy, insolvency, reorganization and other laws of general applicability relating to or affecting the enforcement of creditors’ rights and to general equity principles.

Notwithstanding anything to the contrary contained herein, the Company may from time to time, without notice to or consent of the Holders, issue such additional principal amounts of Additional Notes as may be issued and authenticated pursuant to Section 2.14 of this Indenture, and Notes authenticated and delivered upon registration or transfer of, or in exchange for, or in lieu of, other Notes of the same series pursuant to Section 2.06, Section 2.08, Section 2.09, Section 3.06 or Section 9.04.

The Trustee may appoint an agent (the “Authenticating Agent”) reasonably acceptable to the Company to authenticate the Notes. Unless limited by the terms of such appointment, any such Authenticating Agent may authenticate Notes whenever the Trustee may do so. Each reference in this Indenture to authentication by the Trustee includes authentication by such Authenticating Agent.

In case the Company, pursuant to Article 5, shall be consolidated or merged with or into any other Person or shall sell, lease or convey all or substantially all of its properties or assets to any Person, and the Successor (if other than the Company), shall have executed an indenture supplemental hereto (if not otherwise a party to the Indenture) with the Trustee pursuant to Article 5, any of the Notes authenticated or delivered prior to such consolidation, merger, sale, lease or conveyance may, from time to time, at the request of such Successor, be exchanged for other Notes executed in the name of such Successor with such changes in phraseology and form as may be appropriate, but otherwise in substance of like tenor as the Notes surrendered for such exchange and of like principal amount; and the Trustee, upon Authentication Order of such Successor, shall authenticate and deliver Notes as specified in such order for the purpose of such exchange. If Notes shall at any time be authenticated and delivered in any new name of a Successor (if other than the Company) pursuant to this Section 2.02 in exchange or substitution for or upon registration of transfer of any Notes, such Successor, at the option of the Holders but without expense to them, shall provide for the exchange of all Notes at the time outstanding for Notes authenticated and delivered in such new name.

In connection with the transfer, authentication or cancellation of any Notes by the Trustee, in addition to the other requirements of this Article 2 and Section 10.03, the Trustee may require that the Company deliver to the Trustee an Opinion of Counsel as provided in Section 7.02(b).

Section 2.03. Registrar and Paying Agent. The Company shall maintain an office or agency where Notes may be presented for registration of transfer or for exchange (the “Registrar”) and an office or agency where Notes may be presented for payment (the “Paying Agent”). The Registrar shall keep a register of the Notes and of their transfer and exchange. The Company may have one or more additional paying agents. The term “Paying Agent” includes any such additional paying agent. The Company may change the Registrar or appoint one or more co-Registrars without notice.

In the event the Company shall retain any Person not a party to this Indenture as a Paying Agent or Registrar hereunder, the Company shall enter into an appropriate agency agreement with any Registrar or Paying Agent not a party to this Indenture, which shall incorporate the applicable terms of the Trust Indenture Act. Such agency agreement shall implement the provisions of this Indenture that relate to such Paying Agent or Registrar. The Company shall notify the Trustee in writing of the name and address of each such Paying Agent or Registrar. If the Company fails to maintain a Registrar or Paying Agent, the Trustee shall act as such and shall be entitled to appropriate compensation therefor pursuant to Section 7.07. The Company shall be responsible for the fees and compensation of all Paying Agents and Registrars appointed or approved by it. Either the Company or any of its domestically incorporated wholly-owned Subsidiaries may act as a Registrar or Paying Agent.

The Company initially appoints the Trustee as Registrar and Paying Agent for the Notes.

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Section 2.04. Paying Agent to Hold Money in Trust. By no later than 11:00 a.m. (New York City time) on the date on which any principal or interest on any Note is due and payable, the Company shall deposit with the applicable Paying Agent a sum sufficient to pay such principal or interest when due. The Company shall require each Paying Agent (other than the Trustee) to agree in writing that such Paying Agent shall hold in trust for the benefit of Noteholders or the Trustee all money held by such Paying Agent for the payment of principal of or interest on the Notes of the applicable series and shall notify the Trustee in writing of any Default by the Company in making any such payment. If either of the Company or any of its Subsidiaries acts as Paying Agent, it shall segregate the money held by it as Paying Agent and hold it as a separate trust fund. The Company at any time may require a Paying Agent (other than the Trustee) to pay all money held by it to the Trustee and to account for any funds disbursed by such Paying Agent. Upon complying with this Section 2.04, the Paying Agent (if other than the Company or a Subsidiary) shall have no further liability for the money delivered to the Trustee. Upon any bankruptcy, reorganization or similar proceeding with respect to the Company, the Trustee shall serve as Paying Agent for the Notes.

Section 2.05. Noteholder Lists. The Registrar shall preserve in as current a form as is reasonably practicable the most recent list available to it of the names and addresses of Noteholders of each series. If the Trustee is not the Registrar, the Company shall cause the Registrar to furnish to the Trustee, in writing at least five Business Days before each Interest Payment Date and at such other times as the Trustee may request in writing, a list in such form and as of such date as the Trustee may reasonably require of the names and addresses of Noteholders.

Section 2.06. Transfer and Exchange. Notwithstanding any other provision of this Indenture or the Notes (other than Section 2.01(e) hereof), transfers and exchanges of Notes of any series and beneficial interests in a Global Note of the kinds specified in this Section 2.06 shall be made only in accordance with this Section 2.06. The Registrar shall retain copies of all letters, notices and other written communications received pursuant to Section 2.01 or this Section 2.06. The Company shall have the right to inspect and make copies of all such letters, notices or other written communications at any reasonable time upon the giving of reasonable written notice to the Registrar.

(a) Transfer and Exchange of Definitive Notes for Definitive Notes. Upon request by a Holder of Definitive Notes and such Holder’s compliance with the provisions of this Section 2.06, the Registrar will register the transfer or exchange of Definitive Notes. Prior to such registration of transfer or exchange, the requesting Holder must present or surrender to the Registrar the Definitive Notes duly endorsed or accompanied by a written instruction of transfer in form satisfactory to the Registrar duly executed by such Holder or by its attorney, duly authorized in writing. In addition, the requesting Holder must provide any additional certifications, documents and information, as applicable, required pursuant to the following provisions of this Section 2.06. A Holder of Definitive Notes may transfer such Notes to a Person who takes delivery thereof in the form of a Definitive Note.

(b) Transfer and Exchange of Definitive Notes for Beneficial Interests. A Holder of a Definitive Note may exchange such Note for a beneficial interest in a Global Note or transfer such Definitive Notes to a Person who takes delivery thereof in the form of a beneficial interest in a Global Note at any time. Upon receipt of a request for such an exchange or transfer, the Trustee shall cancel the applicable Definitive Note and increase or cause to be increased the aggregate principal amount of one of the Global Notes.

(c) Transfer or Exchange of Beneficial Interests for Definitive Notes. A beneficial interest in a Global Note may be exchanged for a Note of such series that is not a Global Note as provided in Section 2.01(e).

(d) Transfer and Exchange of Beneficial Interests in the Global Notes. The transfer and exchange of beneficial interests in the Global Notes will be effected through the Depositary, in accordance with the provisions of this Indenture. Beneficial interests in any Global Note may be transferred to Persons who take delivery thereof in the form of a beneficial interest in a Global Note. No written orders or instructions shall be required to be delivered to the Registrar to effect the transfers described in this Section 2.06(d) and Section 2.06(c) hereof.

(e) Obligations with Respect to Transfers and Exchanges of Notes.

(i) To permit registrations of transfers and exchanges, the Company shall, subject to the other terms and conditions of this Article 2, execute and the Trustee shall authenticate Definitive Notes and Global Notes at the Registrar’s or co-Registrar’s request and upon a written order of the Company.

(ii) No service charge shall be made to a Holder for any registration of transfer or exchange, but the Company may require payment of a sum sufficient to cover any transfer tax, assessments, or similar governmental charge payable in connection therewith (other than any such transfer taxes, assessments or similar governmental charges payable upon exchange or transfer pursuant to Section 3.06 or Section 9.04).

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(iii) Neither the Registrar nor the co-Registrar or the Issuer shall be required to register the transfer of or exchange of any Note for a period beginning (A) 15 days before the transmission of a notice of an offer to repurchase or redeem Notes of any series and ending at the close of business on the day of such transmission or (B) 15 days before an Interest Payment Date and ending on such Interest Payment Date.

(iv) Prior to the due presentation for registration of transfer of any Note, the Company, the Trustee, the Paying Agent, the Registrar or any co-Registrar may deem and treat the person in whose name a Note is registered as the absolute owner of such Note for the purpose of receiving payment of principal of and interest on such Note and for all other purposes whatsoever, whether or not such Note is overdue, and none of the Company, the Trustee, the Paying Agent, the Registrar or any co-Registrar shall be affected by notice to the contrary.

(v) All Notes of any series issued upon any transfer or exchange pursuant to the terms of this Indenture shall be the valid and legally binding obligation of the Company, shall evidence the same debt and shall be entitled to the same benefits under this Indenture as the Notes of such series surrendered upon such transfer or exchange.

(f) No Obligation of the Trustee.

(i) The Trustee shall have no responsibility or obligation to any beneficial owner of a Global Note, a member of, or a participant in, DTC or other Person in respect of any aspect of the records, or for maintaining, supervising or reviewing any records, relating to beneficial ownership interests of a Global Note, with respect to the accuracy of the records of DTC or its nominee or of any participant or member thereof, with respect to any ownership interest in the Notes or with respect to the delivery to any participant, member, beneficial owner or other Person (other than DTC) of any notice (including any notice of redemption) or the payment of any amount or delivery of any Notes (or other security or property) under or with respect to such Notes. All notices and communications to be given to the Holders and all payments to be made to Holders in respect of the Notes shall be given or made only to or upon the order of the registered Holders (which shall be DTC or its nominee in the case of a Global Note). The rights of beneficial owners in any Global Note shall be exercised only through DTC subject to the applicable rules and procedures of DTC. The Trustee and the Company may conclusively rely and shall be fully protected in relying upon information furnished by DTC with respect to its members, participants and any beneficial owners.

(ii) The Trustee shall have no obligation or duty to monitor, determine or inquire as to compliance with any restrictions on transfer imposed under this Indenture or under applicable law with respect to any transfer of any interest in any Note of any series (including any transfers between or among Agent Members or beneficial owners of interests in any Global Note) other than to require delivery of such certificates and other documentation or evidence as are expressly required by, and to do so if and when expressly required by, the terms of this Indenture, and to examine the same to determine substantial compliance as to form with the express requirements hereof.

(g) Transfer and Exchange of Global Notes. A Global Note may not be transferred as a whole except by DTC to a nominee of DTC, by a nominee of DTC to DTC or to another nominee of DTC or by DTC or any such nominee to a successor depositary or to a nominee of such successor depositary.

Neither the Trustee nor any agent thereof shall have any responsibility for any actions taken or not taken by DTC or any successor depositary.

Section 2.07. Business Days. If a payment date is on a date that is not a Business Day, payment shall be made on the next succeeding day that is a Business Day, and no interest shall accrue on such payment for the intervening period. If a regular record date is on a day that is not a Business Day, the record date shall not be affected.

Section 2.08. Replacement Notes. If a mutilated Note is surrendered to the Registrar or if the Holder of a Note shall provide the Company and the Trustee with evidence to their satisfaction that the Note has been lost, destroyed or wrongfully taken, the Company shall issue and the Trustee shall authenticate a replacement Note of the same series if the requirements of Section 8-405 of the Uniform Commercial Code are met and the Holder satisfies any other reasonable requirements of the Trustee. In addition, such Holder shall furnish an indemnity or surety bond sufficient in the judgment of the Company and the Trustee to protect the Company, the Trustee, the Paying Agent and the Registrar from any loss that any of them may suffer if a Note is replaced. The Company and the Trustee may charge the Holder for their expenses in replacing a Note, including reasonable fees and expenses of counsel. Every replacement Note is an additional obligation of the Company.

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Section 2.09. Outstanding Notes. Notes of any series outstanding at any time are all Notes authenticated by the Trustee except for those cancelled, those delivered for cancellation and those described in this Section 2.09 as not outstanding. A Note does not cease to be outstanding because the Company or an Affiliate of the Company holds the Note.

If a Note is replaced pursuant to Section 2.08, it ceases to be outstanding unless the Trustee and the Company receive proof satisfactory to them that the replaced Note is held by a bona fide purchaser.

If the Paying Agent segregates and holds in trust, in accordance with this Indenture, on a Redemption Date or Stated Maturity Date money sufficient to pay all principal and interest payable on that date with respect to the Notes of any series (or portions thereof) to be redeemed or maturing, as the case may be, then on and after that date such Notes (or portions thereof) cease to be outstanding and interest on them ceases to accrue.

Section 2.10. Temporary Notes. Until Definitive Notes are ready for delivery, the Company may prepare and the Trustee shall authenticate and deliver temporary Notes. Temporary Notes shall be substantially in the form of Definitive Notes but may have variations that the Company considers appropriate for temporary Notes. Without unreasonable delay, the Company shall prepare and the Trustee shall authenticate and deliver Definitive Notes. After the preparation of Definitive Notes, the temporary Notes shall be exchangeable for Definitive Notes upon surrender of the temporary Notes at any office or agency maintained by the Company for that purpose and such exchange shall be without charge to the Holder. Upon surrender for cancellation of any one or more temporary Notes, the Company shall execute, and the Trustee shall authenticate and deliver in exchange therefor, one or more Definitive Notes representing an equal principal amount of Notes. Until so exchanged, the Holder of temporary Notes shall in all respects be entitled to the same benefits under this Indenture as a Holder of Definitive Notes.

Section 2.11. Cancellation. The Company at any time may deliver Notes to the Trustee for cancellation and such delivery shall be accompanied by an Officers’ Certificate in which the Company directs the Trustee to cancel such Notes. The Registrar and the Paying Agent shall forward to the Trustee for cancellation any Notes surrendered to them for registration of transfer or exchange or payment. The Trustee and no one else shall cancel (subject to the record retention requirements of the Exchange Act) all Notes surrendered for registration of transfer or exchange, payment or cancellation and, upon the written request of the Company, deliver a certificate of such cancellation to the Company. The Company may not issue new Notes to replace Notes it has redeemed, paid or delivered to the Trustee for cancellation, but this shall not prohibit the Company from issuing any Additional Notes. All cancelled Notes held by the Trustee may be disposed of by the Trustee in accordance with its then customary practices and procedures. The Trustee shall provide to the Company a list of all Notes that have been cancelled from time to time as requested in writing by the Company.

Section 2.12. Defaulted Interest. If the Company defaults in a payment of interest on the Notes of any series, the Company shall pay defaulted interest plus interest on such defaulted interest to the extent lawful at the rate specified therefor in the Notes of such series in any lawful manner. The Company may pay the defaulted interest to the Persons who are Noteholders of such series of Notes on a subsequent special record date. The Company shall fix or cause to be fixed any such special record date and payment date to the reasonable satisfaction of the Trustee, which specified record date shall not be less than 10 days prior to the payment date for such defaulted interest and shall promptly transmit or cause to be transmitted to each applicable Noteholder a notice that states the special record date, the payment date and the amount of defaulted interest to be paid. The Company shall notify the Trustee pursuant to an Officers’ Certificate of the amount of defaulted interest proposed to be paid on each Note of the affected series and the date of the proposed payment, and at the same time the Company shall deposit with the Trustee an amount of money equal to the aggregate amount proposed to be paid in respect of such defaulted interest or shall make arrangements satisfactory to the Trustee for such deposit prior to the date of the proposed payment, such money when so deposited to be held in trust for the benefit of the Person entitled to such defaulted interest as provided in this Section 2.12.

Section 2.13. CUSIP Numbers, etc. The Company in issuing the Notes may use “CUSIP” or “ISIN” numbers and/or other similar numbers (if then generally in use), and, if so, the Trustee shall use “CUSIP” and/or “ISIN” numbers in notices of redemption or exchange as a convenience to Holders; provided, however, that any such notice may state that no representation is made as to the correctness of such numbers either as printed on the Notes or as contained in any notice of a redemption or exchange and that reliance may be placed only on the other identification numbers printed on the Notes, and any such redemption or exchange shall not be affected by any defect in or omission of such numbers. The Company shall promptly notify the Trustee in writing of any change in the CUSIP numbers and/or other similar numbers.

Section 2.14. Issuance of Additional Notes. The Company shall be entitled to issue, from time to time, Additional Notes of any series under this Indenture, which shall have identical terms as the Notes of such series issued on the initial Issue Date for such series (in each case, other than with respect to the date of issuance, the issue price, the amount of interest payable on the first payment date applicable thereto and any changes necessary to conform to and ensure compliance with the Securities Act (or other applicable securities laws)), as the case may be; provided that if the Additional Notes are not fungible with the Notes of such series for U.S. federal income tax purposes, the Additional Notes will have a separate CUSIP number.

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With respect to any Additional Notes, the Company shall set forth in a Board Resolution and an Officers’ Certificate, copies of which shall be delivered to the Trustee, the following information:

(i) the aggregate principal amount of such Additional Notes to be authenticated and delivered pursuant to this Indenture; and

(ii) the issue price, the Issue Date and the “CUSIP” and “ISIN” number of any such Additional Notes and the amount of interest payable on the first payment date applicable thereto.

Section 2.15. Section 2.15. One Class of Notes. The Notes of any series and any Additional Notes of such series of Notes shall vote and consent together on all matters as one class, and none of the Notes of any series or any Additional Notes of such series shall have the right to vote or consent as a separate class on any matter.

ARTICLE 3

REDEMPTION

Section 3.01. Applicability of this Article. Redemption of Notes of a series, as permitted or required by any form of Note of such series issued pursuant to this Indenture or the documentation providing therefor, shall be made in accordance with such form of Note or documentation and this Article 3; provided, however, that if any provision of any such form of Note or documentation shall conflict with any provision of this Article, the provision of such form of Note or documentation shall govern.

Section 3.02. Notices to Trustee; Selection of Notes to Be Redeemed. If the Company elects to redeem Notes of any series pursuant to the terms thereof, it shall notify the Trustee in writing of the Redemption Date and the principal amount of Notes to be redeemed.

The Company shall give each notice to the Trustee provided for in this Section 3.02 at least 10 days before the Redemption Date unless the Trustee consents to a shorter period. Such notice shall be accompanied by an Officers’ Certificate from the Company to the effect that such redemption shall comply with the conditions herein. The record date relating to such redemption shall be selected by the Company and set forth in the related notice given to the Trustee, which record date shall be not less than 15 days prior to the date selected for redemption by the Company.

If fewer than all the Notes of a series then outstanding are to be redeemed, the Trustee shall select the Notes of such series to be redeemed pro rata or by lot and in the case of Notes held in book entry form, in accordance with DTC’s applicable procedures.

Notes and portions thereof selected for redemption shall be in amounts of $2,000 or integral multiples of $1,000 in excess thereof. Provisions of this Indenture that apply to Notes of a series called for redemption also apply to portions of Notes of such series called for redemption. The Trustee shall promptly notify the Company of the Notes or portions of Notes to be redeemed.

Section 3.03. Notice of Redemption. At least 30 days but not more than 60 days before a date for redemption of Notes, the Company shall mail (or, in the case of Notes held in book-entry form, send by electronic transmission) a notice of redemption by first-class mail to each Holder of Notes to be redeemed at its registered address.

The notice shall identify the Notes to be redeemed and shall state:

(a) the aggregate amount of Notes to be redeemed;

(b) the Redemption Date;

(c) the redemption price (or the method of calculating such price) and the amount of accrued interest to be paid, if any;

(d) the name and address of the Paying Agent;

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(e) that Notes called for redemption must be surrendered to the Paying Agent to collect the redemption price plus accrued and unpaid interest, if any;

(f) if fewer than all the outstanding Notes of the affected series are to be redeemed, the certificate number (if certificated) and principal amounts of the particular Notes to be redeemed;

(g) that, unless the Company defaults in making such redemption payment, interest on Notes (or portion thereof) called for redemption ceases to accrue on and after the Redemption Date;

(h) the CUSIP number, or any similar number, if any, printed on the Notes being redeemed; and

(i) that no representation is made as to the correctness or accuracy of the CUSIP number, or any similar number, if any, listed in such notice or printed on the Notes.

At the Company’s written request (which may be rescinded or revoked at any time prior to the time at which the Trustee shall have given such notice to the Holders), the Trustee shall give the notice of redemption in the name of the Company and at the Company’s expense (which notice shall be sent by electronic transmission in the case of Notes held in book-entry form). In such event, the Company shall provide the Trustee with the information required by this Section 3.03 at least five Business Days prior to the date chosen for giving such notice to the Holders (unless the Trustee shall agree to a shorter period). The notice, if mailed in the manner herein provided, shall be conclusively presumed to have been given, whether or not the Holder receives such notice. In any case, failure to give such notice by mail or any defect in the notice to the Holder of any Note designated for redemption as a whole or in part shall not affect the validity of the proceedings for the redemption of any other Notes.

Section 3.04. Effect of Notice of Redemption. Once notice of redemption is mailed in accordance with Section 3.03, Notes called for redemption shall become due and payable on the Redemption Date and at the redemption price as stated in the notice. Upon surrender to the Paying Agent on the Redemption Date, such Notes shall be paid at the redemption price stated in the notice, plus accrued and unpaid interest to, but not including, the Redemption Date; provided that the Company shall have deposited the redemption price with the Paying Agent or the Trustee on or before 11:00 a.m. (New York City time) on the Redemption Date; provided, further, that if the Redemption Date is after a regular record date and on or prior to the Interest Payment Date, the accrued and unpaid interest shall be payable to the Noteholder of the redeemed Notes registered on the relevant record date. Failure to give notice or any defect in the notice to any Holder shall not affect the validity of the notice to any other Holder.

Section 3.05. Deposit of Redemption Price. By no later than 11:00 a.m. (New York City time) on the Redemption Date, the Company shall deposit with the Paying Agent (or, if the Company or any of its Subsidiaries is the Paying Agent, shall segregate and hold in trust) an amount of money sufficient to pay the redemption price of and accrued and unpaid interest on all Notes to be redeemed on that date other than Notes or portions of Notes called for redemption that are owned by the Company or a Subsidiary and have been delivered by the Company or such Subsidiary to the Trustee for cancellation. All money, if any, earned on funds held by the Paying Agent shall be remitted to the Company. In addition, the Paying Agent shall promptly return to the Company any money deposited with the Paying Agent by the Company in excess of the amounts necessary to pay the redemption price of, and accrued interest, if any, on, all Notes to be redeemed.

Unless the Company defaults in the payment of such redemption price, interest on the Notes or portions of Notes to be redeemed shall cease to accrue on and after the applicable Redemption Date, whether or not such Notes are presented for payment.

Section 3.06. Notes Redeemed in Part. Upon surrender of a Note that is redeemed in part, the Company shall execute and the Trustee shall authenticate for the Holder thereof (at the Company’s expense) a new Note of the same series, equal in principal amount to the unredeemed portion of the Note surrendered; provided that each new Note shall be in a principal amount of $2,000 or an integral multiple of $1,000 in excess thereof.

ARTICLE 4

COVENANTS

Section 4.01. Payment of Notes. The Company covenants and agrees that it shall promptly pay the principal of and interest on the Notes on the dates and in the manner provided in the Notes and in this Indenture. Principal and interest shall be considered paid on the date due if, on or before 11:00 a.m. (New York City time) on such date, the Trustee or the Paying Agent (or, if the Company or any of its Subsidiaries is the Paying Agent, the segregated account or separate trust fund maintained by the Company or such Subsidiary pursuant to Section 2.04) holds in accordance with this Indenture money sufficient to pay all principal and interest then due.

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The Company shall pay interest on overdue principal at the rate specified therefor in the Notes of each series, and it shall pay interest on overdue installments of interest at the same rate to the extent lawful as provided in Section 2.12.

Notwithstanding anything to the contrary contained in this Indenture, the Company or the Paying Agent may, to the extent it is required to do so by law, deduct or withhold income or other similar taxes imposed by the United States of America or other domestic or foreign taxing authorities from principal or interest payments hereunder.

Section 4.02. Compliance Certificate. The Company will deliver to the Trustee, within 120 days after the end of each fiscal year of the Company ending after the date hereof, an Officer’s Certificate signed by its principal executive officer, principal financial officer or principal accounting officer which shall comply with Section 314 of the Trust Indenture Act, stating whether or not to the knowledge of the signers thereof any Default in the performance and observance of any of the terms, provisions and conditions of this Indenture (without regard to any period of grace or requirement of notice provided hereunder), specifying all such Defaults and the nature and status thereof of which they may have knowledge.

Section 4.03. Maintenance of Office or Agency. The Company shall maintain the office or agency required under Section 2.03. The Company shall give prior written notice to the Trustee of the location, and any change in the location, of such office or agency. If at any time the Company shall fail to maintain any such required office or agency or shall fail to furnish the Trustee with the address thereof, such presentations, surrenders, notices and demands may be made or served at the address of the Trustee set forth in Section 10.01.

Section 4.04. Existence. Except as otherwise permitted by Article 5, the Company shall do or cause to be done all things necessary to preserve and keep in full force and effect its existence as a corporation or other Person.

ARTICLE 5

CONSOLIDATION, MERGER AND SALE OF ASSETS

Section 5.01. When the Company or any Guarantor May Merge or Transfer Assets. The Company or any guarantor shall not consolidate with or sell, lease or convey all or substantially all of its properties or assets to, or merge with or into, in one transaction or a series of related transactions, any other Person, unless:

(a) the Company or such guarantor, as the case may be, shall be the continuing Person or, alternatively, the successor Person formed by or resulting from such consolidation or merger, or the Person that receives the transfer of such properties or assets (the “Successor”) shall be a Person organized under the laws of the United States of America, any State thereof or the District of Columbia and the Successor (if not the Company or such guarantor, as the case may be) shall expressly assume, by supplemental indenture, executed and delivered to the Trustee, in form reasonably satisfactory to the Trustee, all the obligations of the Company under the applicable Notes and this Indenture or of such guarantor under its guarantee of the applicable Notes by executing a supplemental indenture to this Indenture;

(b) immediately after giving effect to such transaction, no Default or Event of Default shall have occurred and be continuing; and

(c) the Company shall have delivered to the Trustee an Officers’ Certificate and an Opinion of Counsel, each stating that such consolidation, merger, conveyance or transfer and such supplemental indenture (if any) comply with this Indenture and that such supplemental indenture constitutes the legal, valid and binding obligation of the Successor subject to customary exceptions.

Section 5.02. Successor Person Substituted. The applicable Successor will succeed to, and be substituted for, and may exercise every right and power of, the Company or such guarantor, as the case may be, under the Indenture or the respective guarantee of the applicable Notes. The Company or such guarantor, as the case may be, shall be relieved of all obligations and covenants under the Notes of each applicable series, the respective guarantee of such Notes and the Indenture; provided that in the case of a lease of all or substantially all of the Company’s or such guarantor’s, as the case may be, property or assets, the Company or such guarantor, as the case may be, will not be released from the obligation to pay the principal of and premium, if any, and interest on such Notes. Notwithstanding the provisions of this Article 5, any guarantor may merge with or into or transfer all or part of its properties or assets to another guarantor or to the Company.

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ARTICLE 6

DEFAULTS AND REMEDIES

Section 6.01. Events of Default. An “Event of Default” occurs with respect to a series of Notes if:

(a) a Default in any payment of interest on any Note of such series when the same becomes due and payable occurs, and such Default continues for a period of 30 days;

(b) a Default in the payment of the principal of or premium, if any, on any Note of such series when the same becomes due and payable at its Stated Maturity occurs, upon optional redemption or otherwise;

(c) the Company or any guarantor fails to comply with any of its agreements in the Notes of such series, this Indenture or any guarantee of the Notes of such series, as applicable (other than those referred to in (a) or (b) above) and such failure continues for 90 days after the notice specified below;

(d) any guarantee with respect to the Notes of such series ceases for any reason to be, or is asserted by the Company or the guarantor not to be, in full force and effect and enforceable in accordance with its terms except to the extent contemplated by this Indenture and any such guarantee of such Notes;

(e) the Company or any guarantor of the Notes of such series pursuant to or within the meaning of any Bankruptcy Law:

(i) commences a voluntary case;

(ii) consents to the entry of an order for relief against it in an involuntary case in which it is the debtor;

(iii) consents to the appointment of a Custodian of it or for any substantial part of its property;

(iv) makes a general assignment for the benefit of its creditors; or

(v) takes any comparable action under any foreign laws relating to insolvency;

(f) a court of competent jurisdiction enters an order or decree under any Bankruptcy Law that:

(i) is for relief against the Company or any guarantor of the Notes of such series in an involuntary case;

(ii) appoints a Custodian of the Company or any guarantor of the Notes of such series or for any substantial part of the property of the Company or any guarantor of the Notes of such series; or

(iii) orders the winding up or liquidation of the Company or any guarantor;

(or any similar relief is granted under any foreign laws) and the order, decree or relief remains unstayed and in effect for 60 consecutive days; or

(g) any other Event of Default provided with respect to the Notes of such series.

An Event of Default under one series of Notes does not necessarily constitute an Event of Default under any other series of Notes. The foregoing will constitute Events of Default whatever the reason for any such Event of Default and whether it is voluntary or involuntary or is effected by operation of law or pursuant to any judgment, decree or order of any court or any order, rule or regulation of any administrative or governmental body.

The term “Bankruptcy Law” means Title 11, United States Code, or any similar Federal or state law for the relief of debtors. The term “Custodian” means any receiver, trustee, assignee, liquidator, custodian or similar official under any Bankruptcy Law.

A Default with respect to Notes of a series under clause (c) of this Section 6.01 is not an Event of Default until the Trustee (by written notice to the Company) or the Holders of at least 25% in aggregate principal amount of the outstanding Notes of such series (by written notice to the Company and the Trustee) gives notice of the Default and the Company does not cure such Default within the time specified in said clause (c) after receipt of such notice. Such notice must specify the Default, demand that it be remedied and state that such notice is a “Notice of Default.”

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The Company shall deliver to the Trustee, within 30 days after the occurrence thereof, written notice in the form of an Officers’ Certificate of any event that with the giving of notice or the lapse of time would become an Event of Default under clauses (c) through (g) of this Section 6.01, its status and what action the Company is taking or proposes to take with respect thereto.

Section 6.02. Acceleration. If an Event of Default with respect to Notes of a series (other than an Event of Default specified in Sections 6.01(e) or 6.01(f) with respect to the Company) occurs and is continuing, the Trustee by written notice to the Company, or the Holders of at least 25% in aggregate principal amount of the outstanding Notes of such series by written notice to the Company and the Trustee, may, and the Trustee at the request of such Holders, shall, declare the principal of and accrued but unpaid interest on all the Notes of such series to be due and payable. Upon such a declaration, such principal and accrued and unpaid interest shall be due and payable immediately. If an Event of Default specified in Section 6.01(e) or 6.01(f) with respect to the Company occurs and is continuing, the principal of and accrued and unpaid interest on all Notes shall ipso facto become and be immediately due and payable without any declaration or other act on the part of the Trustee or any Holders. The Holders of a majority in aggregate principal amount of the outstanding Notes of a series by written notice to the Trustee may rescind an acceleration and its consequences if all existing Events of Default with respect to Notes of such series have been cured or waived except nonpayment of principal or interest that has become due solely because of such acceleration. No such rescission shall affect any subsequent Default or impair any right consequent thereto.

Section 6.03. Other Remedies. If an Event of Default with respect to a series of Notes occurs and is continuing, the Trustee, in conformity with its duties under this Indenture, will exercise all rights or powers under this Indenture at the request or direction of any Holders of such Notes, provided, that such Holders provide the Trustee with an indemnity and/or security reasonably satisfactory to the Trustee against any loss, liability or expense.

The Trustee may maintain a proceeding even if it does not possess any of the Notes or does not produce any of them in the proceeding. A delay or omission by the Trustee or any Noteholder in exercising any right or remedy accruing upon an Event of Default shall not impair the right or remedy or constitute a waiver of or acquiescence in the Event of Default. No remedy is exclusive of any other remedy. All available remedies are, to the extent permitted by law, cumulative.

Section 6.04. Waiver of Past or Existing Defaults. The Holders of a majority in aggregate principal amount of the Notes of a series then outstanding by written notice to the Trustee may, on behalf of the Holders of the Notes of such series, waive any past or existing Default and its consequences except (a) a Default in the payment of the principal of or interest on a Note or (b) a Default in respect of a provision that under Section 9.02 cannot be amended without the consent of each affected Noteholder of such series. When a Default is waived, it is deemed cured, and any Event of Default arising therefrom shall be deemed to have been cured, for every purpose of this Indenture, but no such waiver shall extend to any subsequent or other Default or impair any consequent right.

Section 6.05. Control by Majority. Upon provision of security and/or indemnity reasonably satisfactory to the Trustee, the Holders of a majority in aggregate principal amount of the Notes of any series then outstanding may direct the time, method and place of conducting any proceeding for any remedy available to the Trustee with respect to the Notes of such series or of exercising any trust or power conferred on the Trustee. However, the Trustee, which may conclusively rely on opinions of counsel, may refuse to follow any direction that conflicts with law or this Indenture or that the Trustee determines is unduly prejudicial to the rights of other Noteholders or would involve the Trustee in personal liability; provided, however, that the Trustee may take any other action deemed proper by the Trustee that is not inconsistent with such direction.

Section 6.06. Limitation on Suits. Except to enforce the right to receive payment of principal, premium, if any, or interest when due, a Holder of Notes may not pursue any remedy with respect to this Indenture or the Notes unless:

(a) an Event of Default shall have occurred and be continuing with respect to the relevant series of Notes and the Holder gives to the Trustee prior written notice stating that an Event of Default is continuing;

(b) the Holders of at least 25% in aggregate principal amount of the relevant series of Notes then outstanding (including any Additional Notes of the relevant series) make a written request to the Trustee to pursue the remedy;

(c) such Holder or Holders offer to the Trustee security and/or indemnity reasonably satisfactory to it against any loss, liabilities or expenses in compliance with such request;

(d) the Trustee does not comply with the request within 60 days after receipt of the request and the offer of security or indemnity; and

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(e) the Holders of a majority in aggregate principal amount of the relevant series of Notes then outstanding do not give the Trustee a direction inconsistent with the request during such 60-day period.

A Noteholder may not use this Indenture to prejudice the rights of another Noteholder of the relevant series or to obtain a preference or priority over another Noteholder of the relevant series (it being understood that the Trustee shall not have an affirmative duty to ascertain whether or not such actions or forbearances are unduly prejudicial to such Noteholders).

Section 6.07. Rights of Holders to Receive Payment. Notwithstanding any other provision of this Indenture, the right of any Holder to receive payment of principal of and interest on the relevant series of the Notes held by such Holder, on or after the respective due dates expressed in such Notes, or to bring suit for the enforcement of any such payment on or after such respective dates, shall not be impaired or affected without the consent of such Holder.

Section 6.08. Collection Suit by Trustee. If an Event of Default specified in Section 6.01(a) occurs and is continuing, the Trustee may recover judgment in its own name and as trustee of an express trust against the Company for the whole amount then due and owing (together with interest on any unpaid interest to the extent lawful) and the amounts provided for in Section 7.07.

Section 6.09. Trustee May File Proofs of Claim. The Trustee may file such proofs of claim and other papers or documents as may be necessary or advisable in order to have the claims of the Trustee (including any claim for the reasonable compensation, expenses, disbursements and advances of the Trustee, its agents and counsel) and the Noteholders allowed in any judicial proceedings relative to the Company, its creditors or any other obligor upon the Notes, or any of their creditors or the property of the Company or such other obligor or their creditors and, unless prohibited by law or applicable regulations, may vote on behalf of the Holders in any election of a trustee in bankruptcy or other Person performing similar functions, and any Custodian in any such judicial proceeding is hereby authorized by each Holder to make payments to the Trustee and, in the event that the Trustee shall consent to the making of such payments directly to the Holders, to pay to the Trustee any amount due it for the reasonable compensation, expenses, disbursements and advances of the Trustee, its agents and its counsel, and any other amounts due the Trustee under Section 7.07.

Section 6.10. Priorities. Any money or other property collected by the Trustee pursuant to Article 6 hereof, or any money or other property otherwise distributable in respect of the Company’s obligations under this Indenture, shall be applied in the following order:

FIRST: to the Trustee (including any predecessor Trustee) and its agents for amounts due under this Indenture, including without limitation, Section 7.07 hereto;

SECOND: to Noteholders for amounts due and unpaid on the Notes for principal and interest, ratably, without preference or priority of any kind, according to the amounts due and payable on the relevant series of the Notes for principal and interest, respectively; and

THIRD: to the Company.

The Trustee may, upon prior written notice to the Company, fix a record date and payment date for any payment to Noteholders pursuant to this Section 6.10. At least 15 days before such record date, the Company shall mail to each Noteholder and the Trustee a notice that states the record date, the payment date and amount to be paid.

Section 6.11. Undertaking for Costs. In any suit for the enforcement of any right or remedy under this Indenture or in any suit against the Trustee for any action taken or omitted by it as Trustee, a court in its discretion may require the filing by any party litigant in the suit of an undertaking to pay the costs of the suit, and the court in its discretion may assess reasonable costs, including reasonable attorneys’ fees and expenses, against any party litigant in the suit, having due regard to the merits and good faith of the claims or defenses made by the party litigant. This Section 6.11 does not apply to a suit by the Trustee, a suit by a Holder pursuant to Section 6.07 or a suit by Holders of more than 10% in aggregate principal amount of the outstanding Notes of a series.

Section 6.12. Waiver of Stay or Extension Laws. The Company (to the extent it may lawfully do so) shall not at any time insist upon, or plead, or in any manner whatsoever claim or take the benefit or advantage of, any stay or extension law wherever enacted, now or at any time hereafter in force, which may affect the covenants or the performance of this Indenture; and the Company (to the extent that it may lawfully do so) hereby expressly waives all benefit or advantage of any such law, and shall not hinder, delay or impede the execution of any power herein granted to the Trustee, but shall suffer and permit the execution of every such power as though no such law had been enacted.

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ARTICLE 7

TRUSTEE

Section 7.01. Duties of Trustee. (a) If an Event of Default has occurred and is continuing, the Trustee shall exercise the rights and powers vested in it by this Indenture and use the same degree of care and skill in its exercise as a prudent Person would exercise or use under the circumstances in the conduct of such Person’s own affairs.

(b) Except during the continuance of an Event of Default:

(i) the Trustee undertakes to perform such duties and only such duties as are specifically set forth in this Indenture and no implied covenants or obligations shall be read into this Indenture against the Trustee; and

(ii) in the absence of bad faith on its part, the Trustee may conclusively rely, as to the truth of the statements and the correctness of the opinions expressed therein, upon certificates and opinions furnished to the Trustee and conforming to the requirements of this Indenture. However, in the case of any such certificates and opinions which by any provision hereof are specifically required to be furnished to the Trustee, the Trustee shall examine such certificates and opinions to determine whether or not they conform to the requirements of this Indenture (but need not confirm or investigate the accuracy of mathematical calculations or other facts stated therein).

(c) The Trustee may not be relieved from liability for its own negligent action, its own negligent failure to act or its own willful misconduct, except that:

(i) this subsection does not limit the effect of subsections (b) or (f) of this Section 7.01;

(ii) the Trustee shall not be liable for any error of judgment made in good faith by a Trust Officer unless it is proved that the Trustee was negligent in ascertaining the pertinent facts; and

(iii) the Trustee shall not be liable with respect to any action it takes or omits to take in good faith in accordance with a direction received by it pursuant to Section 6.05.

(d) [Reserved].

(e) The Trustee shall not be liable for interest on any money or other property received by it or for holding moneys or other property uninvested, in either case, except as otherwise agreed between the Company and the Trustee. Money and other property held in trust by the Trustee shall, until used or applied as herein provided, be held in trust for the purposes for which they were received, but need not be segregated from other money or property except to the extent required by law.

(f) No provision of this Indenture shall require the Trustee to expend or risk its own funds or otherwise incur any liability, financial or otherwise, in the performance of any of its duties hereunder or in the exercise of any of its rights or powers, if it shall have reasonable grounds to believe that repayment of such funds or adequate indemnity against such risk or liability is not reasonably assured to it.

(g) Every provision of this Indenture relating to the conduct or affecting the liability of or affording protection to the Trustee shall be subject to the provisions of this Section 7.01 and to the provisions of the Trust Indenture Act, where applicable.

Section 7.02. Rights of Trustee. (a) The Trustee may conclusively rely on, and shall be protected in acting or refraining from acting in reliance on, any document believed by it to be genuine and to have been signed or presented by the proper person. The Trustee need not investigate any fact or matter stated in the document.

(b) Before the Trustee acts or refrains from acting, it may require an Officers’ Certificate or an Opinion of Counsel, or both. The Trustee shall not be liable for any action it takes or omits to take in good faith in reliance on the Officers’ Certificate or Opinion of Counsel.

(c) The Trustee may execute any of the trusts or powers or perform any duties hereunder either directly or through attorneys and agents, respectively, and shall not be responsible for the misconduct or negligence of any attorney or agent appointed with due care by it hereunder.

(d) The Trustee shall not be liable for any action it takes, suffers to exist or omits to take in good faith which it believes to be authorized or within its rights or powers conferred upon it by this Indenture.

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(e) The Trustee may consult with counsel of its selection, and the advice or opinion of counsel with respect to legal matters relating to this Indenture and the Notes shall be full and complete authorization and protection from liability in respect to any action taken, omitted or suffered by it hereunder in good faith and in reliance thereon.

(f) The Trustee shall be under no obligation to exercise any of the rights or powers vested in it by this Indenture at the request or direction of any of the Holders pursuant to this Indenture, unless such Holders shall have offered to the Trustee security or indemnity satisfactory to it against the costs, expenses and liabilities which might be incurred by it in compliance with such request or direction.

(g) The Trustee shall not be charged with knowledge of any Default or Event of Default with respect to the Notes unless written notice of such Default or Event of Default shall have been given to a Trust Officer of the Trustee at the Corporate Trust Office by the Company or any other obligor on the Notes or by any Holder of the Notes. Any such notice shall reference this Indenture and the Notes.

(h) The rights, privileges, protections, immunities and benefits given to the Trustee pursuant to this Indenture, including its rights to be indemnified, are extended to, and shall be enforceable by, the Trustee in each of its capacities as Registrar and Paying Agent, as the case may be, hereunder.

(i) The Trustee shall not be bound to make any investigation into the facts or matters stated in any resolution, certificate, statement, instrument, opinion, report, notice, request, direction, consent, order, bond, debenture, note, other evidence of Indebtedness or other paper or document, but the Trustee, in its discretion, may make such further reasonable inquiry or reasonable investigation into such facts or matters as it may see fit, and, if the Trustee shall determine to make such further inquiry or investigation, it shall be entitled, upon reasonable notice and at reasonable times, to examine the books, records and premises of the Company, personally or by agent or attorney at the sole cost of the Company and shall incur no liability or additional liability of any kind by reason of such inquiry or investigation.

(j) The Trustee shall not be required to give any bond or surety in respect of the performance of its powers and duties hereunder.

(k) The Trustee may request that the Company deliver a certificate setting forth the names of individuals and/or titles of Officers of the Company authorized at such time to take specified actions pursuant to this Indenture.

(l) In no event shall the Trustee be responsible or liable for special, indirect, punitive or consequential loss or damage of any kind whatsoever (including, but not limited to, loss of profit) irrespective of whether the Trustee has been advised of the likelihood of such loss or damage and regardless of the form of action.

Section 7.03. Individual Rights of Trustee. The Trustee in its individual or any other capacity may become the owner or pledgee of Notes and may otherwise deal with the Company with the same rights it would have if it were not Trustee. Any Paying Agent, Registrar or co-paying agent may do the same with like rights. However, the Trustee must comply with Sections [7.10] and 7.11.

Section 7.04. Trustee’s Disclaimer. The Trustee shall not be responsible for and makes no representation as to the validity or adequacy of this Indenture or the Notes, it shall not be accountable for the Company’s use of the proceeds from the Notes, and it shall not be responsible for any statement of the Company in this Indenture or in any document issued in connection with the sale of the Notes or in the Notes other than the Trustee’s certificate of authentication.

Section 7.05. Notice of Defaults. If a Default or an Event of Default occurs with respect to the Notes and is continuing and a Trust Officer receives written notice of such Default or Event of Default, the Trustee shall transmit to each Noteholder notice of Default within 90 days after written notice of it is received by a Trust Officer of the Trustee. Except in the case of a Default in payment of principal of or interest on any Note, the Trustee may withhold the notice if and so long as it in good faith determines that withholding the notice is not opposed to the interests of Noteholders.

Section 7.06. Reports by Trustee to Holders. As promptly as practicable after each May 15 beginning with the May 15 following the date of this Indenture, and in any event prior to July 15 in each year, the Trustee shall mail to each Noteholder a brief report dated as of such May 15 that complies with Section 313(a) of the Trust Indenture Act. The Trustee also shall comply with Section 313(b) of the Trust Indenture Act. The Trustee shall promptly deliver to the Company a copy of any report it delivers to Holders pursuant to this Section 7.06.

A copy of each report at the time of its mailing to Noteholders shall be filed by the Trustee with the SEC and each stock exchange (if any) on which the Notes are listed. The Company agrees to notify promptly the Trustee in writing whenever the Notes become listed on any stock exchange and of any delisting thereof.

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Section 7.07. Compensation and Indemnity. The Company covenants and agrees to pay to the Trustee (and any predecessor Trustee) from time to time such compensation for its services as the Company and the Trustee shall from time to time mutually agree in writing. The Trustee’s compensation shall not be limited by any law on compensation of a trustee of an express trust. The Company shall reimburse the Trustee upon request for all reasonable out-of-pocket expenses (including attorneys’ fees and expenses), disbursements and advances incurred or made by it in accordance with the provisions of this Indenture, including costs of collection, in addition to such compensation for its services, except any such expense, disbursement or advance as shall be determined to have been caused by its own negligence or willful misconduct. Such expenses shall include the reasonable compensation and expenses, disbursements and advances of the Trustee’s agents and counsel. The Trustee shall provide the Company reasonable notice of any expenditure not in the ordinary course of business. The Company shall indemnify each of the Trustee, its officers, directors, employees and any predecessor Trustees against any and all loss, damage, claim (whether asserted by the Company, a Holder or any other Person) liability or expense (including reasonable attorneys’ fees and expenses) (other than taxes applicable to the Trustee’s compensation hereunder) incurred by it in connection with the acceptance or administration of this trust and the performance of its duties hereunder. The Trustee shall notify the Company promptly of any claim of which a Trust Officer has received written notice and for which it may seek indemnity. Failure by the Trustee so to notify the Company shall not relieve the Company of its obligations hereunder. The Company shall defend the claim and the Trustee shall cooperate, to the extent reasonable, in the defense of any such claim, and, if (in the sole judgment of the Trustee) the facts and/or issues surrounding the claim are reasonably likely to create a conflict with the Company, the Company shall pay the reasonable fees and expenses of separate counsel to the Trustee. The Company need not reimburse any expense or indemnify against any loss, liability or expense incurred by the Trustee through the Trustee’s own willful misconduct or negligence. The Company need not pay for any settlement made without its consent, which consent shall not be unreasonably withheld or delayed.

To secure the Company’s payment obligations in this Section 7.07, the Trustee (including any predecessor trustee) shall have a lien prior to the Notes on all money or property held or collected by the Trustee other than money or property held in trust to pay principal of and interest on particular Notes.

The Company’s payment obligations pursuant to this Section 7.07 shall survive the satisfaction, discharge and termination of this Indenture, the resignation or removal of the Trustee and any discharge of this Indenture including any discharge under any bankruptcy law. In addition to and without prejudice to the rights provided to the Trustee under any of the provisions of this Indenture, when the Trustee incurs expenses or renders services after the occurrence of a Default specified in Section 6.01(e) or 6.01(f) with respect to the Company, the expenses and the compensation for the services are intended to constitute expenses of administration under the Bankruptcy Law.

Section 7.08. Replacement of Trustee. The Trustee may resign at any time upon 30 days’ written notice to the Company. The Holders of a majority in principal amount of the Notes then outstanding, may remove the Trustee upon 30 days’ written notice to the Trustee and may appoint a successor Trustee, which successor Trustee shall be reasonably acceptable to the Company. The Company shall remove the Trustee if:

(a) the Trustee fails to comply with Section 7.10;

(b) the Trustee is adjudged bankrupt or insolvent;

(c) a receiver or other public officer takes charge of the Trustee or its property; or

(d) the Trustee otherwise becomes incapable of acting.

If the Trustee resigns, is removed by the Company or by the Holders of a majority in principal amount of the Notes and such Holders do not reasonably promptly appoint a successor Trustee, or if a vacancy exists in the office of Trustee for any reason (the Trustee in such event being referred to herein as the retiring Trustee), the Company shall promptly appoint a successor Trustee.

A successor Trustee shall deliver a written acceptance of its appointment to the retiring Trustee and to the Company and the Company shall pay all amounts due and owing to the Trustee under Section 7.07 of the Indenture. Thereupon the resignation or removal of the retiring Trustee shall become effective, and the successor Trustee shall have all the rights, powers and duties of the Trustee under this Indenture. The successor Trustee shall mail a notice of its succession to Noteholders affected by such resignation or removal. The retiring Trustee shall promptly transfer all property held by it as Trustee to the successor Trustee, subject to the lien provided for in Section 7.07.

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If a successor Trustee does not take office with respect to the Notes within 30 days after the retiring Trustee resigns or is removed, the retiring Trustee or the Holders of 10% in principal amount of the Notes may petition at the expense of the Company any court of competent jurisdiction for the appointment of a successor Trustee.

If the Trustee fails to comply with Section 7.10, any Noteholder may petition any court of competent jurisdiction for the removal of the Trustee and the appointment of a successor Trustee.

Notwithstanding the replacement of the Trustee pursuant to this Section 7.08, the Company’s obligations under Section 7.07 shall continue for the benefit of the retiring Trustee.

Section 7.09. Successor Trustee by Merger. If the Trustee consolidates with, merges or converts into, or transfers all or substantially all its corporate trust business or assets to, another corporation or banking association, the resulting, surviving or transferee corporation without any further act shall be the successor Trustee; provided that such corporation shall be otherwise qualified and eligible under this Article 7 and Section 310(a) of the Trust Indenture Act, without the execution or filing of any paper or any further act on the part of the parties hereto.

In case at the time such successor or successors by merger, conversion or consolidation to the Trustee shall succeed to the trusts created by this Indenture any of the Notes shall have been authenticated but not delivered, any such successor to the Trustee may adopt the certificate of authentication of any predecessor trustee, and deliver such Notes so authenticated; and in case at that time any of the Notes shall not have been authenticated, any successor to the Trustee may authenticate such Notes either in the name of any predecessor hereunder or in the name of the successor to the Trustee; and in all such cases such certificates shall have the full force which it is anywhere in the Notes or in this Indenture provided that the certificate of the Trustee shall have.

Section 7.10. Eligibility; Disqualification. The Trustee shall at all times satisfy the requirements of Section 310(a) of the Trust Indenture Act. The Trustee shall have a combined capital and surplus of at least $50,000,000 as set forth in its most recent published annual report of condition. The Trustee shall comply with Section 310(b) of the Trust Indenture Act; provided, however, that there shall be excluded from the operation of Section 310(b)(1) of the Trust Indenture Act and any indenture or indentures under which other securities or certificates of interest or participation in other securities of the Company are outstanding if the requirements for such exclusion set forth in Section 310(b)(1) of the Trust Indenture Act are met.

Nothing herein shall prevent the Trustee from filing with the SEC the application referred to in the second to last paragraph of Section 310(b) of the Trust Indenture Act.

Section 7.11. Preferential Collection of Claims Against the Company. The Trustee shall comply with Section 311(a) of the Trust Indenture Act, excluding any creditor relationship listed in Section 311(b) of the Trust Indenture Act. A Trustee who has resigned or been removed shall be subject to Section 311(a) of the Trust Indenture Act to the extent indicated.

ARTICLE 8

DISCHARGE OF INDENTURE; DEFEASANCE

Section 8.01. Discharge of Liability on Notes; Defeasance. (a) With respect to a series of Notes, when (i) the Company delivers to the Trustee all outstanding Notes of such series that have not already been delivered to the Trustee for cancellation or (ii) (A) all outstanding Notes of such series have become due and payable, whether at maturity, as a result of repayment at the option of the Holders or as a result of the mailing of a notice of redemption pursuant to Article 3 hereof or (B) the Notes of such series shall become due and payable at their Stated Maturity within one year, or the Notes of such series are to be called for redemption within one year under arrangements satisfactory to the Trustee for the giving of notice of redemption by the Trustee in the name, and at the expense, of the Company, and, in each case of this clause (ii), the Company or any guarantor, if applicable, irrevocably deposits or causes to be deposited with the Trustee funds sufficient to pay at maturity or upon redemption all outstanding Notes of such series, including interest thereon to maturity or such Redemption Date, and if in the case of either clause (i) or (ii) the Company or any guarantor, if applicable, pays all other sums payable hereunder by the Company and any guarantor, if applicable, then this Indenture shall, subject to Section 8.01(c), cease to be of further effect. The Trustee shall acknowledge satisfaction and discharge of this Indenture on demand of the Company or any guarantor, if applicable, accompanied by an Officers’ Certificate and an Opinion of Counsel that all conditions precedent provided herein for satisfaction and discharge of this Indenture have been complied with at the cost and expense of the Company.

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(b) Subject to Section 8.01(c) and Section 8.02, the Company at any time may terminate (i) all of its obligations and the obligations of any guarantors under the Notes of a series, the applicable guarantees and this Indenture as it relates to such Notes and related guarantees (“legal defeasance option”) or (ii) its obligations, and the obligations of any guarantor, under Sections 4.02, 4.03 and 4.04, Article 5 and the operation of Sections 6.01(c) and 6.01(d) as it relates to a series of Notes and related guarantees (“covenant defeasance option”). The Company may exercise its legal defeasance option as it relates to a series of Notes notwithstanding its prior exercise of its covenant defeasance option as it relates to such Notes.

If the Company exercises its legal defeasance option with respect to the Notes of a series, payment of the Notes of such series may not be accelerated because of an Event of Default. If the Company exercises its covenant defeasance option, payment of the Notes of such series may not be accelerated because of an Event of Default specified in Sections 6.01(c) or 6.01(d).

Upon satisfaction of the conditions set forth herein and upon request of the Company the Trustee shall acknowledge in writing the discharge of those obligations that the Company terminates.

(c) Notwithstanding clauses (a) and (b) above, the Company’s or any guarantor’s, if applicable, obligations in Sections 2.03, 2.04, 2.05, 2.08, 4.01, 7.07, 7.08, 8.04, 8.05 and 8.06 shall survive until the Notes of each series have been paid in full. Thereafter, the Company’s and the Trustee’s obligations in Sections 7.07, 8.04 and 8.05 shall survive such satisfaction and discharge.

Section 8.02. Conditions to Defeasance. The Company may exercise its legal defeasance option or its covenant defeasance option with respect to a series of the Notes only if:

(a) the Company or any guarantor, if applicable, irrevocably deposits or causes to be deposited in trust with the Trustee money or U.S. Government Obligations or a combination thereof that through the scheduled payment of principal and interest in respect thereof in accordance with their terms shall provide cash at such times and in such amounts as shall be sufficient to pay principal and interest when due on all outstanding Notes of such series (except Notes replaced pursuant to Section 2.08) to maturity or redemption, as the case may be;

(b) the Company delivers to the Trustee a certificate from a nationally recognized firm of independent accountants or valuation consultants expressing their opinion that the payments of principal and interest when due and without reinvestment on the deposited U.S. Government Obligations plus any deposited money without investment shall provide cash at such times and in such amounts as shall be sufficient to pay principal and interest when due on all outstanding Notes of such series to maturity or redemption, as the case may be;

(c) 91 days pass after the deposit is made and during such 91-day period no Default specified in Sections 6.01(e) or 6.01(f) occurs that is continuing at the end of the period;

(d) the Company shall have delivered to the Trustee an Officers’ Certificate stating that the deposit was not made by the Company or any guarantor, if applicable, with the intent of defeating, hindering, delaying or defrauding any creditors of the Company or any guarantor, if applicable;

(e) in the case of the legal defeasance option, the Company shall have delivered to the Trustee an Opinion of Counsel stating that (i) the Company has received from, or there has been published by, the Internal Revenue Service a ruling, or (ii) since the date of this Indenture there has been a change in the applicable federal income tax law, in either case to the effect that, and based thereon such Opinion of Counsel shall confirm that, the Holders of Notes of such series will not recognize income, gain or loss for U.S. federal income tax purposes as a result of such deposit and defeasance and will be subject to U.S. federal income tax on the same amounts, in the same manner and at the same times as would have been the case if such deposit and defeasance had not occurred;

(f) in the case of the covenant defeasance option, the Company shall have delivered to the Trustee an Opinion of Counsel to the effect that the Holders of Notes of such series will not recognize income, gain or loss for U.S. federal income tax purposes as a result of such deposit and defeasance and will be subject to U.S. federal income tax on the same amounts, in the same manner and at the same times as would have been the case if such deposit and defeasance had not occurred; and

(g) the Company delivers to the Trustee an Officers’ Certificate and an Opinion of Counsel, each stating that all conditions precedent to the defeasance and discharge of the Notes as contemplated by this Indenture have been complied with.

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Before or after a deposit, the Company may make arrangements satisfactory to the Trustee for the redemption of any of the Notes at a future date in accordance with Article 3.

Section 8.03. Application of Trust Money. The Trustee shall hold in trust money or U.S. Government Obligations deposited with it pursuant to this Article 8. It shall apply the deposited money and the money from U.S. Government Obligations either directly or through the Paying Agent as the Trustee may determine and in accordance with this Indenture to the payment of principal of and interest on the series of the Notes that was defeased.

Section 8.04. Repayment to the Company. The Trustee and the Paying Agent shall promptly turn over to the Company upon request any excess money or securities held by them at any time.

Subject to any applicable abandoned property law, the Trustee and the Paying Agent shall pay to the Company upon written request any money held by them for the payment of principal or interest that remains unclaimed for two years after the date of payment of such principal and interest, and, thereafter, Noteholders entitled to the money must look to the Company for payment as general creditors.

Any unclaimed funds held by the Trustee pursuant to this Section 8.04 shall be held uninvested and without any liability for interest.

Section 8.05. Indemnity for Government Obligations. The Company shall pay and shall indemnify the Trustee against any tax, fee or other charge imposed on or assessed against deposited U.S. Government Obligations or the principal and interest received on such U.S. Government Obligations other than any such tax, fee or other charge which by law is for the account of the Holders of the defeased Notes; provided that the Trustee shall be entitled to charge any such tax, fee or other charge to such Holder’s account.

Section 8.06. Reinstatement. If the Trustee or Paying Agent is unable to apply any money or U.S. Government Obligations in accordance with this Article 8 by reason of any legal proceeding or by reason of any order or judgment of any court or governmental authority enjoining, restraining or otherwise prohibiting such application, the Company’s obligations under this Indenture as it relates to the defeased Notes and such Notes shall be revived and reinstated as though no deposit had occurred pursuant to this Article 8 until such time as the Trustee or Paying Agent is permitted to apply all such money or U.S. Government Obligations in accordance with this Article 8; provided, however, that (a) if the Company has made any payment of interest on or principal of any series of the Notes following the reinstatement of its obligations, the Company shall be subrogated to the rights of the Holders of the particular Notes to receive such payment from the money or U.S. Government Obligations held by the Trustee or Paying Agent and (b) unless otherwise required by any legal proceeding or any order or judgment of any court or governmental authority, the Trustee or Paying Agent shall return all such money and U.S. Government Obligations to the Company promptly after receiving a written request therefor at any time, if such reinstatement of the Company’s obligations has occurred and continues to be in effect.

ARTICLE 9

AMENDMENTS

Section 9.01. Without Consent of Holders. The Company and the Trustee may amend this Indenture or the Notes of a series without notice to or consent of any Noteholder of such series:

(a) to cure any ambiguity, omission, defect or inconsistency;

(b) to evidence the succession of another Person to the Company (or any guarantor) and the assumption by any such successor of the obligations of the Company (or those of any guarantor) in accordance with the provisions of Article 5;

(c) to add any additional Events of Default;

(d) to add to the covenants of the Company for the benefit of the Holders of all the Notes of such series or to surrender any right or power herein conferred upon the Company;

(e) to add one or more guarantees for the benefit of Holders of the Notes of such series or to release one or more guarantees in accordance with this Indenture or any supplemental indenture hereto;

(f) add collateral security with respect to the Notes of such series;

(g) to add or appoint a successor or separate Trustee or other agent;

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(h) to provide for the issuance of any Notes or Additional Notes of such series;

(i) to comply with any requirements in connection with qualifying this Indenture under the Trust Indenture Act;

(j) to comply with the rules of any applicable securities depository;

(k) to provide for uncertificated Notes in addition to or in place of certificated Notes; provided, however, that the uncertificated Notes are issued in registered form for purposes of Section 163(f) of the Code;

(l) to conform the provisions of this Indenture to the “Description of Notes,” “Description of the Notes and Guarantees,” “Description of Debt Securities” and any similar sections of any offering memorandum or prospectus prepared in connection with the issuance of the Notes of such series (with the basis for any such amendment pursuant to this clause (l) to be set forth in an Officers’ Certificate);

(m) to make changes to this Indenture applicable only to another series of Notes issuable hereunder; and

(n) to change any other provision if the change does not adversely affect the interests of any Noteholder of such series.

After an amendment under this Section 9.01 becomes effective, the Company shall mail to Noteholders of the affected series a notice briefly describing such amendment. The failure to give such notice to all Noteholders of the affected series, or any defect therein, shall not impair or affect the validity of an amendment under this Section 9.01.

Section 9.02. With Consent of Holders. The Company and the Trustee may amend this Indenture or the Notes of a series without notice to any Noteholder but with the written consent of the Holders of at least a majority in principal amount of the Notes then outstanding of such series (including consents obtained in connection with a tender offer or exchange for Notes). However, without the consent of each affected Noteholder of a series, an amendment may not:

(a) change the Stated Maturity of the principal of, or installment of interest on, any Note of such series;

(b) reduce the principal amount of, or the rate of interest on, any Notes of such series;

(c) reduce any premium payable on the redemption or required repurchase of any Note of such series or change the date on which any Note of such series may or must be redeemed, repaid or required to be repurchased;

(d) change the coin or currency in which the principal of, premium, if any, or interest on any Note of such series is payable;

(e) impair the right of any Holder of such series to institute suit for the enforcement of any payment on or after the Stated Maturity of any Note of such series;

(f) reduce the percentage in principal amount of the outstanding Notes of such series, the consent of whose Holders is required in order to take certain actions;

(g) reduce the requirements for quorum or voting by Holders in this Indenture or the Notes of such series;

(h) modify any of the provisions of this Indenture regarding the waiver of past defaults and the waiver of certain covenants by Holders except to increase any percentage vote required or to provide that certain other provisions of the Indenture cannot be modified or waived without the consent of the holder of each Note affected thereby; or

(i) modify any of the above provisions of this Section 9.02.

It shall not be necessary for the consent of the Holders under this Section 9.02 to approve the particular form of any proposed amendment, but it shall be sufficient if such consent approves the substance thereof.

After an amendment under this Section 9.02 becomes effective, the Company shall mail to Noteholders of the affected series a notice briefly describing such amendment. The failure to give such notice to all Noteholders of the affected series, or any defect therein, shall not impair or affect the validity of an amendment under this Section 9.02.

Section 9.03. Effect of Consents and Waivers. A consent to an amendment, supplement or a waiver by a Holder of a Note shall bind the Holder and every subsequent Holder of that Note or portion of the Note that evidences the same debt as the consenting Holder’s Note, even if notation of the consent or waiver is not made on the Note. After an amendment or waiver becomes effective with respect to the Notes of a series, it shall bind every Noteholder of such series.

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The Company may, but shall not be obligated to, fix a record date for the purpose of determining the Noteholders entitled to give their consent or take any other action described above or required or permitted to be taken pursuant to this Indenture. If a record date is fixed, then notwithstanding the immediately preceding paragraph, those Persons who were Noteholders of the relevant series at such record date (or their duly designated proxies), and only those Persons, shall be entitled to give such consent or to take any such action, whether or not such Persons continue to be Holders of such series after such record date.

Section 9.04. Notation on or Exchange of Notes. If an amendment changes the terms of a Note, the Trustee may require the Holder of the Note to deliver it to the Trustee. The Company shall provide in writing to the Trustee an appropriate notation to be placed on the Note regarding the changed terms and return it to the Holder. Alternatively, if the Company or the Trustee so determine, the Company in exchange for the Note shall issue and the Trustee shall authenticate a new Note that reflects the changed terms. Failure to make the appropriate notation or to issue a new Note shall not affect the validity of such amendment.

Section 9.05. Trustee to Sign Amendments. The Trustee shall sign any amendment authorized pursuant to this Article 9 if the amendment does not adversely affect the rights, duties, liabilities or immunities of the Trustee. If it does, the Trustee may but need not sign it. In signing such amendment the Trustee shall receive indemnity reasonably satisfactory to it. In signing any amendment the Trustee shall receive, and (subject to Section 7.01) shall be fully protected in conclusively relying upon, in addition to the documents required by Section 10.03, an Officers’ Certificate and an Opinion of Counsel stating that such amendment is authorized or permitted by this Indenture and that such supplemental indenture constitutes the legal valid and binding obligation of the Company in accordance with its terms subject to customary exceptions.

Upon the execution of any supplemental indenture under this Article 9, this Indenture shall be modified in accordance therewith, and such supplemental Indenture shall form a part of this Indenture for all purposes; and every Noteholder theretofore or thereafter authenticated and delivered hereunder shall be bound thereby.

Section 9.06. Compliance with Trust Indenture Act. Every amendment to this Indenture or the Notes of any series shall comply with the Trust Indenture Act as then in effect.

ARTICLE 10

MISCELLANEOUS

Section 10.01. Notices. Except as otherwise indicated herein, any notice or communication shall be in writing (including facsimile and electronic communications in PDF format) and delivered in person or mailed by first-class mail addressed as follows:

if to the Company and any guarantors:

Southwest Gas Corporation

5241 Spring Mountain Road

Post Office Box 98510

Las Vegas, Nevada 89193-8510

Attention: Kenneth J. Kenny

Facsimile: (702) 876-7117

Email: ken.kenny@swgas.com

with a copy to:

Morrison & Foerster LLP

425 Market Street

San Francisco, California 94105

Attention: Brandon C. Parris, Esq.

Facsimile: (415) 268-7522

Email: bparris@mofo.com

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if to the Trustee:

The Bank of New York Mellon Trust Company, N.A.

2 N. LaSalle Street. 7th Floor

Chicago, Illinois 60602

Attention: Corporate Trust Administration

Facsimile: (312) 827-8522

The Trustee agrees to accept and act upon instructions or directions pursuant to this Indenture sent by unsecured e-mail, pdf, facsimile transmission or other similar unsecured electronic methods, provided, however, that the Trustee shall have received an incumbency certificate listing persons designated to give such instructions or directions and containing specimen signatures of such designated persons, which such incumbency certificate shall be amended and replaced whenever a person is to be added or deleted from the listing. If the Company elects to give the Trustee e-mail or facsimile instructions (or instructions by a similar electronic method) and the Trustee in its discretion elects to act upon such instructions, the Trustee’s understanding of such instructions shall be deemed controlling. The Trustee shall not be liable for any losses, costs or expenses arising directly or indirectly from the Trustee’s reliance upon and compliance with such instructions notwithstanding such instructions conflict or are inconsistent with a subsequent written instruction. The Company agrees to assume all risks arising out of the use of such electronic methods to submit instructions and directions to the Trustee, including without limitation the risk of the Trustee acting on unauthorized instructions, and the risk of interception and misuse by third parties.

Notwithstanding any other provision of this Indenture or any Note, where this Indenture or any Note provides for notice of any event or any other communication (including any notice of redemption or repurchase) to a holder of a Global Note (whether by mail or otherwise), such notice shall be sufficiently given if given to the Depositary (or its designee) pursuant to the standing instructions from the Depositary or its designee, including by electronic mail in accordance with accepted practices at the Depositary.

Any notice or communication mailed to a Noteholder shall be mailed to the Noteholder at the Noteholder’s address as it appears on the registration books of the Registrar and shall be sufficiently given if so mailed within the time prescribed.

Failure to mail a notice or communication to a Noteholder or any defect in it shall not affect its sufficiency with respect to other Noteholders. If a notice or communication is mailed in the manner provided above, it is duly given, whether or not the addressee receives it.

Section 10.02. Communication by Holders with Other Holders. Noteholders may communicate pursuant to Section 312(b) of the Trust Indenture Act with other Noteholders with respect to their rights under this Indenture or the Notes. The Company, the Trustee, the Registrar and anyone else shall have the protection of Section 312(c) of the Trust Indenture Act.

Section 10.03. Certificate and Opinion as to Conditions Precedent. Upon any request or application by the Company to the Trustee to take or refrain from taking any action under this Indenture, the Company shall furnish to the Trustee:

(a) an Officers’ Certificate in form reasonably satisfactory to the Trustee stating that, in the opinion of the signers, all conditions precedent, if any, provided for in this Indenture relating to the proposed action have been complied with; and

(b) an Opinion of Counsel in form reasonably satisfactory to the Trustee stating that, in the opinion of such counsel, all such conditions precedent have been complied with.

Section 10.04. Statements Required in Certificate or Opinion. The certificate or opinion with respect to compliance with a covenant or condition provided for in this Indenture shall include:

(a) a statement that the individual making such certificate or opinion has read such covenant or condition;

(b) a brief statement as to the nature and scope of the examination or investigation upon which the statements or opinions contained in such certificate or opinion are based;

(c) a statement that, in the opinion of such individual, he has made such examination or investigation as is necessary to enable him to express an informed opinion as to whether or not such covenant or condition has been complied with; and

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(d) a statement as to whether or not, in the opinion of such individual, such covenant or condition has been complied with.

Section 10.05. When Notes Disregarded. In determining whether the Holders of the required principal amount of Notes of a series have concurred in any direction, waiver or consent, Notes of such series owned by the Company or by any Person directly or indirectly controlling or controlled by or under direct or indirect common control with the Company shall be disregarded and deemed not to be outstanding, except that, for the purpose of determining whether the Trustee shall be protected in conclusively relying on any such direction, waiver or consent, only Notes of such series which a Trust Officer of the Trustee actually knows are so owned shall be so disregarded. Also, subject to the foregoing, only Notes of such series outstanding at the time shall be considered in any such determination.

Section 10.06. Rules by Trustee, Paying Agent and Registrar. The Trustee may make reasonable rules for action by or a meeting of Noteholders. The Registrar and the Paying Agent may make reasonable rules for their functions.

Section 10.07. Governing Law. This Indenture and the Notes shall be governed by, and construed in accordance with, the laws of the State of New York.

Section 10.08. No Recourse Against Others. A director, Officer, employee or shareholder (other than the Company), as such, of the Company shall not have any liability for any obligations of the Company under the Notes of any series or this Indenture or for any claim based on, in respect of or by reason of such obligations or their creation. By accepting a Note, each Noteholder shall waive and release all such liability. The waiver and release shall be part of the consideration for the issue of the Notes.

Section 10.09. Successors. All agreements of the Company in this Indenture and the Notes shall bind its successors and assigns. All agreements of the Trustee in this Indenture shall bind its successors and assigns.

Section 10.10. Multiple Originals. The parties may sign any number of copies of this Indenture. Each signed copy shall be an original, but all of them together represent the same agreement. One signed copy is enough to prove this Indenture. The exchange of copies of this Indenture and of signature pages by facsimile or PDF transmission shall constitute effective execution and delivery of this Indenture as to the parties hereto and may be used in lieu of the original Indenture and signature pages for all purposes.

Section 10.11. Variable Provisions. The Company initially appoints the Trustee as Paying Agent and Registrar and custodian with respect to any Global Notes.

Section 10.12. Table of Contents; Headings. The table of contents, cross-reference sheet and headings of the Articles and Sections of this Indenture have been inserted for convenience of reference only, are not intended to be considered a part hereof and shall not modify or restrict any of the terms or provisions hereof.

Section 10.13. Waiver of Jury Trial. EACH OF THE COMPANY, THE HOLDERS AND THE TRUSTEE HEREBY IRREVOCABLY WAIVES, TO THE FULLEST EXTENT PERMITTED BY APPLICABLE LAW, ANY AND ALL RIGHT TO TRIAL BY JURY IN ANY LEGAL PROCEEDING ARISING OUT OF OR RELATING TO THIS INDENTURE, THE NOTES OR THE TRANSACTION CONTEMPLATED HEREBY.

Section 10.14. Force Majeure. In no event shall the Trustee be responsible or liable for any failure or delay in the performance of its obligations hereunder arising out of or caused by, directly or indirectly, forces beyond its control, including, without limitation, strikes, work stoppages, accidents, acts of war or terrorism, civil or military disturbances, nuclear or natural catastrophes or acts of God, and interruptions, loss or malfunctions of utilities, communications or computer (software and hardware) services; it being understood that the Trustee shall use reasonable efforts which are consistent with accepted practices in the banking industry to resume performance as soon as practicable under the circumstances.

Section 10.15. Section 10.15. U.S.A. Patriot Act. The parties hereto acknowledge that in accordance with Section 326 of the USA Patriot Act (Title III of Pub. L. 107-56 (signed into law October 26, 2001)) (the “U.S.A. Patriot Act”), the Trustee, like all financial institutions and in order to help fight the funding of terrorism and money laundering, is required to obtain, verify, and record information that identifies each person or legal entity that establishes a relationship or opens an account with the Trustee. The parties to this Indenture agree that they will provide the Trustee with such information as it may request in order for the Trustee to satisfy the requirements of the U.S.A. Patriot Act.

28

Section 10.16. Trust Indenture Act Controls. If any provision of this Indenture limits, qualifies or conflicts with the duties imposed by, or with another provision included or that is required to be included in this Indenture by the Trust Indenture Act, the duty or provision required by the Trust Indenture Act shall control.

Section 10.17. Foreign Account Tax Compliance Act (FATCA). In order to comply with applicable tax laws, rules and regulations (inclusive of directives, guidelines and interpretations promulgated by competent authorities) in effect from time to time (“Applicable Law”), the Company agrees (i) to provide to The Bank of New York Mellon Trust Company, N.A., upon request, such information in its possession regarding holders or other applicable parties and/or transactions (including any modification to the terms of such transactions) so The Bank of New York Mellon Trust Company, N.A. can determine whether it has tax related obligations under Applicable Law and (ii) that The Bank of New York Mellon Trust Company, N.A. shall be entitled to make such withholding or deduction from payments under the Indenture as may be necessary to comply with Applicable Law. The terms of this section shall survive the termination of this Indenture.

29

IN WITNESS WHEREOF, the parties have caused this Indenture to be duly executed as of the date first written above.

(Signature Page to Base Indenture)

EXHIBIT A

[FORM OF FACE OF NOTE]

SOUTHWEST GAS CORPORATION

[ ]% [SENIOR] NOTES DUE 20[]

Southwest Gas Corporation, a California corporation, for value received, promises to pay to , or registered assigns, the principal sum of Dollars [(subject to adjustment as reflected in the Schedule of Increases and Decreases in Global Note attached hereto)] on [ ], 20[ ].

Interest Payment Dates: and of each year, commencing on [ ] [first interest payment date relating to any Additional Notes].

Record Dates: [ ] and [ ] of each year.

Additional provisions of this Note are set forth on the other side of this Note.

A-1

IN WITNESS WHEREOF, SOUTHWEST GAS CORPORATION has caused this Note to be duly executed.

Dated: [ ], 20[ ]

A-2

TRUSTEE’S CERTIFICATE OF AUTHENTICATION

This is one of the Notes referred to

in the within-mentioned Indenture.

Dated: [ ], 20[ ]

A-3

[FORM OF REVERSE SIDE OF NOTE]

[Reverse of Note]

[ ]% [Senior] Notes due 20[ ]

1. Interest

Southwest Gas Corporation, a California corporation (together with its successors and assigns under the Indenture hereinafter referred to, being herein called the “Company”), promises to pay interest on the principal amount of this Note at the rate of % per annum.

The Company shall pay interest semiannually on and of each year (each such date, an “Interest Payment Date”), commencing on [ ], 20[ ]. Interest on the Notes shall accrue from [ ], 20[ ] [date of issuance of any Additional Notes], or from the most recent date to which interest has been paid on the Notes. Interest shall be computed on the basis of a 360-day year comprised of twelve 30-day months.

2. Method of Payment

By no later than 11:00 a.m. (New York City time) on the date on which any principal of or interest on any Note is due and payable, the Company shall irrevocably deposit with the Trustee or the Paying Agent money sufficient to pay such principal and/or interest. The Company shall pay interest (except defaulted interest) to the Persons who are registered Holders of Notes at the close of business on the [ ] or [ ] immediately preceding the Interest Payment Date even if Notes are cancelled, repurchased or redeemed after the record date and on or before the Interest Payment Date. Holders must surrender Notes to a Paying Agent to collect principal payments. The Company shall pay principal and interest in money of the United States of America that at the time of payment is legal tender for payment of public and private debts. Payments in respect of Notes represented by a Global Note (including principal, premium, if any, and interest) shall be made by the transfer of immediately available funds to the accounts specified by The Depository Trust Company. The Company may make all payments in respect of a Definitive Note (including principal, premium, if any, and interest) by mailing a check to the registered address of each Holder thereof or by wire transfer to an account located in the United States of America maintained by the payee.

3. Paying Agent and Registrar

The Bank of New York Mellon Trust Company, N.A., a national banking association (the “Trustee”), shall initially act as Paying Agent and Registrar. The Company may appoint and change any Paying Agent or Registrar without notice to any Noteholder. The Company or any of its domestically organized wholly-owned Subsidiaries may act as Paying Agent.

4. Indenture

The Company issued the Notes under an Indenture dated as of [ ], 20[ ] (as it may be amended or supplemented from time to time in accordance with the terms thereof, the “Indenture”), between the Company and the Trustee. The terms of the Notes include those stated in the Indenture and those made part of the Indenture by reference to the Trust Indenture Act of 1939 (15 U.S.C. §§ 77aaa-77bbbb) as in effect on the date of the Indenture (the “Trust Indenture Act”). Terms used herein and not defined herein have the meanings ascribed thereto in the Indenture. The Notes are subject to all such terms, and Noteholders are referred to the Indenture and the Trust Indenture Act for a statement of those terms. To the extent any provision of this Note conflicts with the express provisions of the Indenture, the provisions of the Indenture shall govern and be controlling.

The Notes are senior unsecured obligations of the Company. The Note is one of the Notes referred to in the Indenture. The Notes of this series include the Notes of this series issued on the Issue Date and any Additional Notes of this series issued in accordance with Section 2.14 of the Indenture. The Notes of this series and any Additional Notes of this series are treated as a single class of securities under the Indenture. The Indenture imposes certain limitations on the ability of the Company and its Subsidiaries to create liens, enter into sale and leaseback transactions and enter into mergers and consolidations.

5. Redemption

The Notes shall be redeemable, in whole or in part, at any time and from time to time, at the option of the Company, at a redemption price equal to the greater of (1) 100% of the aggregate principal amount of such Notes to be redeemed and (2) the sum of the present values of the Remaining Scheduled Payments, plus, in each case, accrued and unpaid interest thereon to, but not including, the Redemption Date; provided that if the Company redeems any Notes on or after [                ], 20[ ] ([                ] months prior to the stated maturity date of the Notes), the redemption price for those Notes will equal 100% of the principal amount of the Notes to be redeemed, plus accrued and unpaid interest thereon to, but not including, the Redemption Date.

A-4

In determining the present values of the Remaining Scheduled Payments, the Company will discount such payments to the redemption date on a semiannual basis (assuming a 360-day year consisting of twelve 30-day months) using a discount rate equal to the Treasury Rate plus [ ] basis points.

“Comparable Treasury Issue” means the U.S. Treasury security selected by an Independent Investment Banker as having an actual or interpolated maturity comparable to the remaining term of the Notes to be redeemed that would be utilized, at the time of selection and in accordance with customary financial practice, in pricing new issues of corporate debt securities of comparable maturity to the remaining term of such Notes.

“Comparable Treasury Price” means, with respect to any Redemption Date, (1) the arithmetic average of the Reference Treasury Dealer Quotations for such Redemption Date after excluding the highest and lowest Reference Treasury Dealer Quotations, or (2) if the Company obtains fewer than four Reference Treasury Dealer Quotations, the arithmetic average of all Reference Treasury Dealer Quotations for such Redemption Date.

“Independent Investment Banker” means a Primary Treasury Dealer or their respective successors as may be appointed from time to time by the Company; provided, however, that if any of the foregoing ceases to be a Primary Treasury Dealer, the Company will substitute another Primary Treasury Dealer.

“Reference Treasury Dealer” means a Primary Treasury Dealer (as defined below) selected by the Company, unless such entity ceases to be a primary U.S. Government securities dealer in the United States of America (a “Primary Treasury Dealer”), in which case the Company shall substitute another Primary Treasury Dealer.

“Reference Treasury Dealer Quotations” means, with respect to each Reference Treasury Dealer and any Redemption Date, the arithmetic average, as determined by the Company, of the bid and asked prices for the Comparable Treasury Issue (expressed in each case as a percentage of its principal amount) quoted in writing to the Company by such Reference Treasury Dealer as of 3:30 p.m., New York City time, on the third Business Day preceding such Redemption Date.

“Remaining Scheduled Payments” means, with respect to any Note to be redeemed, the remaining scheduled payments of the principal of and premium, if any, and interest on such Note that would be due after the related Redemption Date but for such redemption; provided, however, that, if such Redemption Date is not an Interest Payment Date with respect to such Note, the amount of the next scheduled interest payment thereon will be reduced by the amount of interest accrued thereon to such Redemption Date.

“Treasury Rate” means, with respect to any Redemption Date, the rate per annum, as determined by the Company, equal to the semiannual equivalent yield to maturity (computed as of the third Business Day immediately preceding such Redemption Date) of the Comparable Treasury Issue. In determining this rate, the Company will assume a price for the Comparable Treasury Issue (expressed as a percentage of its principal amount) equal to the Comparable Treasury Price for such Redemption Date.

Except as set forth above and in Article 5 of the Notes, the Notes shall not be redeemable by the Company prior to maturity.

The Notes shall not be entitled to the benefit of any sinking fund.

6. Notice of Redemption

At least 30 days but not more than 60 days before a date for redemption of Notes of this series, the Company shall mail (or, at the Company’s option in the case of Notes held in book-entry form, send by electronic transmission) a notice of redemption by first-class mail to each Holder of Notes to be redeemed at its registered address. Notes in denominations of principal amount larger than $2,000 may be redeemed in part but only in integral multiples of $1,000 in excess thereof. If money sufficient to pay the redemption price of and accrued and unpaid interest on all Notes (or portions thereof) to be redeemed on the Redemption Date is deposited with the Paying Agent on or before 11:00 a.m. (New York City time) on the Redemption Date (or, if the Company or any of its Subsidiaries is the Paying Agent, such money is segregated and held in trust) and certain other conditions are satisfied, on and after such date interest shall cease to accrue on such Notes (or such portions thereof) called for redemption.

A-5

7. Denominations; Transfer; Exchange

The Notes are in fully registered form without coupons in denominations of principal amount of $2,000 and integral multiples of $1,000 in excess thereof. A Holder may register, transfer or exchange Notes in accordance with the Indenture. The Registrar may require a Holder, among other things, to furnish appropriate endorsements or transfer documents and to pay any taxes and fees required by law or permitted by the Indenture. The Registrar need not register the transfer of or exchange any Notes selected for redemption (except, in the case of a Note to be redeemed in part, the portion of the Note not to be redeemed) for a period beginning 15 days before the mailing of a notice of redemption of Notes to be redeemed and ending on the date of such mailing.

8. Persons Deemed Owners

The registered holder of this Note shall be treated as the owner of it for all purposes.

9. Unclaimed Money

If money for the payment of principal or interest remains unclaimed for two years after the date of payment of principal and interest, the Trustee or Paying Agent shall pay the money back to the Company at its request. After any such payment, Holders entitled to the money must look only to the Company and not to the Trustee for payment.

10. Defeasance

Subject to certain conditions set forth in the Indenture, the Company or any guarantor, as applicable, at any time may terminate some or all of its obligations under the Notes of this series and the Indenture as it relates to the Notes of this series if the Company or any guarantor, as applicable, deposits with the Trustee money or U.S. Government Obligations for the payment of principal of and interest on the Notes to redemption or maturity, as the case may be.

11. Amendment, Waiver

Subject to certain exceptions set forth in the Indenture, (i) the Indenture or the Notes may be amended with the written consent of the Holders of at least a majority in principal amount of the outstanding Notes and (ii) any default or noncompliance with any provision of the Indenture or the Notes may be waived with the written consent of the Holders of a majority in principal amount of the outstanding Notes (including consents obtained in connection with a tender offer or exchange for Notes). However, the Indenture requires the consent of each Noteholder that would be affected for certain specified amendments or modifications of the Indenture and the Notes. Subject to certain exceptions set forth in the Indenture, without the consent of any Noteholder, the Company and the Trustee may amend the Indenture or the Notes, among other things, to cure any ambiguity, omission, defect or inconsistency, or to evidence the succession of another Person to the Company (or any guarantor) and the assumption by any such Person of the obligations of the Company (or any guarantor) in accordance with Article 5 of the Indenture, or to add any additional Events of Default, or to add to the covenants of the Company for the benefit of the Holders of the Notes or surrender rights and powers conferred on the Company, or to add one or more guarantees for the benefit of the Holders of the Notes or to release one or more guarantees in accordance with the Indenture, or to add collateral security with respect to the Notes, or to add or appoint a successor or separate trustee or other agent, or to provide for the issuance of Additional Notes, or to comply with any requirements in connection with qualifying the Indenture under the Trust Indenture Act, or to provide for uncertificated Notes in addition to or in place of certificated Notes, or to comply with the rules of any applicable securities depository or to conform the provisions of the Indenture to the “Description of Notes,” “Description of the Notes and Guarantees” or “Description of Debt Securities” sections of any offering memorandum or prospectus prepared in connection with the issuance of the Notes (with the basis for any such amendment to be set forth in an Officers’ Certificate), or to make changes to the Indenture applicable only to other series of Notes issuance thereunder, or to change any other provision if the change does not adversely affect the interests of any Noteholder.

12. Defaults and Remedies

Under the Indenture, Events of Default include (a) a Default in any payment of interest on any Note of such series when the same becomes due and payable occurs, and such default continues for a period of 30 days; (b) a Default in the payment of the principal of or premium, if any, on any Note of such series when the same becomes due and payable at its Stated Maturity occurs, upon optional redemption or otherwise; (c) the Company or any guarantor fails to comply with any of its agreements in the Notes, the Indenture or any guarantee of the Notes, as applicable (other than those referred to in (a) or (b) above) and such failure continues for 90 days after the notice specified below; (d) any guarantee with respect to the Notes ceases for any reason to be, or is asserted by the Company or the guarantor not to be, in full force and effect and enforceable in accordance with its terms except to the extent contemplated by this Indenture and any such guarantee of the Notes; and (e) certain events of bankruptcy or insolvency involving the Company or any guarantor.

A-6

A Default with respect to Notes of a series under clause (c) above is not an Event of Default until the Trustee (by written notice to the Company) or the Holders of at least 25% in aggregate principal amount of the outstanding Notes of such series (by written notice to the Company and the Trustee) gives notice of the Default and the Company does not cure such Default within the time specified in said clause (c) after receipt of such notice. Such notice must specify the Default, demand that it be remedied and state that such notice is a “Notice of Default.”

If an Event of Default occurs and is continuing with respect to Notes of this series, the Trustee or the Holders of at least 25% in aggregate principal amount of the Notes of this series may declare all the Notes of this series to be due and payable immediately. Certain events of bankruptcy or insolvency involving the Company are Events of Default which will result in the Notes of this series being due and payable immediately upon the occurrence of such Events of Default.

Noteholders may not enforce the Indenture or the Notes except as provided in the Indenture. The Trustee may refuse to enforce the Indenture or the Notes unless it receives indemnity and/or security reasonably satisfactory to it. Subject to certain limitations, Holders of a majority in principal amount of the Notes of this series may direct the Trustee in its exercise of any trust or power. The Trustee may withhold from Noteholders notice of any continuing Default or Event of Default (except a Default or Event of Default in payment of principal or interest) if it in good faith determines that withholding notice is not opposed to their interest.

13. Trustee Dealings with the Company

Subject to certain limitations set forth in the Indenture, the Trustee under the Indenture, in its individual or any other capacity, may become the owner or pledgee of Notes and may otherwise deal with and collect obligations owed to it by the Company and may otherwise deal with the Company with the same rights it would have if it were not Trustee.

14. No Recourse Against Others

A director, officer, employee or shareholder (other than the Company), as such, of the Company shall not have any liability for any obligations of the Company under the Notes or the Indenture or for any claim based on, in respect of or by reason of such obligations or their creation. By accepting a Note, each Noteholder waives and releases all such liability. The waiver and release are part of the consideration for the issue of the Notes.

15. Authentication

This Note shall not be valid until an authorized signatory of the Trustee (or an authenticating agent acting on its behalf) manually signs the certificate of authentication on the other side of this Note.

16. Abbreviations

Customary abbreviations may be used in the name of a Noteholder or an assignee, such as TEN COM (tenants in common), TEN ENT (tenants by the entirety), JT TEN (joint tenants with rights of survivorship and not as tenants in common), CUST (custodian) and U/G/M/A (Uniform Gift to Minors Act).

17. CUSIP and ISIN Numbers

The Company has caused CUSIP and ISIN numbers and/or other similar numbers to be printed on the Notes and has directed the Trustee to use CUSIP and ISIN numbers and/or other similar numbers in notices of redemption as a convenience to Noteholders. No representation is made as to the accuracy of such numbers either as printed on the Notes or as contained in any notice of redemption and reliance may be placed only on the other identification numbers placed thereon.

18. Governing Law

This Note shall be governed by, and construed in accordance with, the laws of the State of New York.

A-7

ASSIGNMENT FORM

To assign this Note, fill in the form below:

I or we assign and transfer this Note to

(Print or type assignee’s name, address and zip code)

(Insert assignee’s Social Security or Tax I.D. No.)

and irrevocably appoint as agent to transfer this Note on the books of the Company. The agent may substitute another to act for him.

Your Signature:

(Signature must be guaranteed by a participant in a recognized Signature

Guarantee Medallion Program or other signature guarantor program reasonably

acceptable to the Trustee)

A-8

[TO BE ATTACHED IF A GLOBAL NOTE]

SCHEDULE OF INCREASES AND DECREASES IN GLOBAL NOTE

The following increases and decreases in this Global Note have been made:

A-9

Exhibit 4.2

SOUTHWEST GAS CORPORATION,

as Issuer

and

The Bank of New York Mellon Trust Company, N.A.,

as Trustee

FIRST SUPPLEMENTAL INDENTURE

Dated as of June 4, 2020

2.200% SENIOR NOTES DUE 2030

CROSS-REFERENCE TABLE

Certain Sections of this Indenture relating to Sections 310 through 318, inclusive, of the Trust Indenture Act of 1939, as amended:

Note: This Cross-Reference Table shall not, for any purpose, be deemed to be part of this Indenture.

TABLE OF CONTENTS

-i-

TABLE OF CONTENTS

(continued)

-ii-

TABLE OF CONTENTS

(continued)

-iii-

FIRST SUPPLEMENTAL INDENTURE, dated as of June 4, 2020, between Southwest Gas Corporation, a California corporation (the “Company”), and The Bank of New York Mellon Trust Company, N.A., a national banking association, as Trustee (the “Trustee”).

THIS FIRST SUPPLEMENTAL INDENTURE CONTAINS ALL OF THE TERMS RELEVANT TO THE 2.200% SENIOR NOTES DUE 2030 OF SOUTHWEST GAS CORPORATION. THE BASE INDENTURE (AS DEFINED HEREIN), AS IT MAY BE AMENDED AND SUPPLEMENTED FROM TIME TO TIME, AS TO WHICH THE FIRST SUPPLEMENTAL INDENTURE SUPPLEMENTS, NEED NOT BE REFERRED TO WITH RESPECT TO THE TERMS OF THE 2.200% SENIOR NOTES DUE 2030 GOVERNED HEREBY.

RECITALS OF THE COMPANY

WHEREAS, the Company and the Trustee entered into an indenture in respect of the issuance of Debt Securities (as defined herein) by the Company, dated as of June 4, 2020 (the “Base Indenture”);

WHEREAS, Sections 2.01 and 9.01 of the Base Indenture provide that the Company and the Trustee may enter into a supplemental indenture to the Base Indenture for, among other things, the purpose of establishing the designation, form, terms and provisions of the Debt Securities;

WHEREAS, clause (h) of Section 9.01 of the Base Indenture provides that the Company and the Trustee may enter into a supplemental indenture to the Base Indenture to provide for the issuance of Debt Securities of any series as permitted by Section 2.01 of the Base Indenture;

WHEREAS, clause (m) of Section 9.01 of the Base Indenture provides that the Company and the Trustee may enter into a supplemental indenture to the Base Indenture to make changes to the Base Indenture applicable only to a particular series of Debt Securities;

WHEREAS, the Company desires to establish and issue a new series of Debt Securities, the Company’s 2.200% Senior Notes due 2030 (the “Notes”), pursuant to the Base Indenture, as modified by this supplemental indenture (the “Supplemental Indenture”); and

WHEREAS, the Company desires to enter into this Supplemental Indenture pursuant to Sections 2.01 and 9.01 of the Base Indenture (i) to supplement the Base Indenture, (ii) to provide for the issuance of the Notes and (iii) to make changes to the Base Indenture with respect to (and only with respect to) the Notes as contemplated by Sections 2.01 and 9.01 of the Base Indenture.

NOW, THEREFORE, in consideration of the foregoing, the parties hereto, for the benefit of each other and for the equal and proportionate benefit of all Persons who hereafter become Holders of the Notes, hereby enter into this Supplemental Indenture which amends, modifies, supplements and restates in its entirety (except solely for the provisions of the Base Indenture which authorize the creation of this Supplemental Indenture) the Base Indenture with respect to (and only with respect to) the Notes, as follows:

ARTICLE 1

DEFINITIONS AND INCORPORATION BY REFERENCE

Section 1.01. Definitions.

“Additional Notes” means any Notes (other than the Initial Notes) issued under the terms of this Indenture (other than pursuant to Sections 2.06, 2.08, 2.10, 3.06 and 9.04 of this Indenture, in the case of Notes that are not already Additional Notes).

“Base Indenture” has the meaning assigned to it in the recitals hereto.

“Board of Directors” means, with respect to any Person, the Board of Directors of such Person, any management committee of such Person or any committee thereof duly authorized to act on behalf of such Board of Directors or such management committee.

1

“Board Resolution” means a copy of a resolution certified by the Secretary or an Assistant Secretary of the Company to have been duly adopted by the Board of Directors of the Company, and to be in full force and effect on the date of such certification, and delivered to the Trustee.

“Business Day” means any day other than a Saturday, a Sunday or a day on which banking institutions or trust companies in New York City are authorized or required by law, regulation or executive order to close.

“Capital Stock” means, with respect to any Person, any and all shares, interests, rights to purchase, warrants, options, participations or other equivalents of or interests in (however designated) equity of such Person, including any preferred stock, partnership interests and limited liability company membership interests, but excluding any debt securities convertible into such equity.

“Code” means the U.S. Internal Revenue Code of 1986, as amended.

“Company” means the Person named as the “Company” in the preamble to this Indenture until a successor Corporation shall have succeeded to such Person pursuant to the applicable provisions of this Indenture, and thereafter, the “Company” shall mean such successor Corporation.

“Corporate Trust Office” means the office of the Trustee at which, at any particular time, this Indenture shall be principally administered; which office at the date of the execution of this Indenture is located at 2 N. LaSalle Street, 7th Floor, Chicago, Illinois 60602, Attention: Corporate Trust Administration, or at any other time at such other address as the Trustee may designate from time to time by written notice to the Holders.

“Corporation” means a corporation, association, company, joint-stock company or business trust.

“Default” means any event that is, or after notice or passage of time or both would be, an Event of Default.

“DTC” means The Depository Trust Company, its nominees and their respective successors and assigns.

“Exchange Act” means the Securities Exchange Act of 1934, as amended, and the rules and regulations promulgated by the SEC thereunder.

“Finance Lease” means any lease of property of the Company (whether real, personal or mixed) by the Company as lessee that would, in conformity with generally accepted accounting principles, be required to be accounted for as a finance lease on the balance sheet of the Company.

“Funded Debt” means all Indebtedness of the Company that by its terms or by the terms of any instrument or agreement relating thereto matures more than one year from, or is directly or indirectly renewable or extendable at the option of the Company to a date more than one year from the date of creation thereof (including an option of the Company under a revolving credit or similar agreement obligating the lender or lenders to extend credit over a period of more than one year), but excluding any payments due under the terms thereof within 12 months of any date of determination (including any deposit or payment required to be made under any prepayment provision, sinking fund, purchase fund or similar provision).

“GAAP” means generally accepted accounting principles in the United States of America in effect from time to time.

“guarantee” means any obligation, contingent or otherwise, of any Person directly or indirectly guaranteeing any Indebtedness of any other Person and any obligation, direct or indirect, contingent or otherwise, of such Person (1) to purchase or pay (or advance or supply funds for the purchase or payment of) such Indebtedness of such other Person (whether arising by virtue of partnership arrangements, or by agreements to keep well, to purchase assets, goods, securities or services, to take or pay or to maintain financial statement conditions or otherwise) or (2) entered into for purposes of assuring in any other manner the obligee of such Indebtedness of the payment thereof or to protect such obligee against loss in respect thereof (in whole or in part); provided, however, that the term “guarantee” will not include endorsements for collection or deposit in the ordinary course of business. The term “guarantee,” when used as a verb, has a correlative meaning.

“guarantor” means any Person that guarantees the Notes.

“Holder” or “Noteholder” means the Person in whose name a Note is registered on the security register books of the Registrar.

2

“incur” means issue, assume, guarantee or otherwise become liable for.

“Indebtedness” means, as applied to any Person, Finance Leases, bonds, notes, debentures and other securities representing obligations for borrowed money created or assumed by such Person. All indebtedness guaranteed as to payment of principal in any manner by such Person or in effect guaranteed by such Person through a contingent agreement to purchase such indebtedness, and all indebtedness that is both secured by a Lien upon property owned by such Person and upon which such Person customarily pays interest, even though such Person has not assumed or become liable for the payment of such indebtedness, shall for all purposes hereof be deemed to be “Indebtedness” of such Person.

“Indenture” means the Base Indenture, as supplemented by this Supplemental Indenture, in each case as amended or supplemented from time to time.

“Initial Notes” means the $450,000,000 aggregate principal amount of Notes issued under this Indenture on the Issue Date.

“Interest Payment Date” means the Stated Maturity of an installment of interest on the Notes as specified in the Form of Face of Note contained in Exhibit A.

“Issue Date” means June 4, 2020.

“Lien” means any lien, mortgage, pledge, security interest, charge or other encumbrance of any kind.

“Officer” means the Chief Executive Officer, President, the Controller, the Chief Operating Officer, any Vice President, the Treasurer, the Assistant Treasurer, the Chief Financial Officer, the Chief Accounting Officer, the General Counsel, the Secretary or the Assistant Secretary, as applicable.

“Officers’ Certificate” means a certificate signed by any two Officers of the Company.

“Opinion of Counsel” means a written opinion, reasonably acceptable to the Trustee, from legal counsel to the Company. The counsel may be an employee of the Company. Opinions of Counsel required to be delivered under this Indenture may have qualifications customary for opinions of the type required and counsel delivering such Opinions of Counsel may rely on certificates of the Company or governmental or other officials customary for opinions of the type required, including certificates certifying as to matters of fact.

“Person” means any individual, Corporation, limited liability company, partnership, joint venture, trust, unincorporated organization or government or any agency or political subdivision thereof.

“principal” means the principal of the Notes plus the premium, if any, payable on the Notes that is due or overdue or is to become due at the relevant time; provided, however, that for purposes of calculating any such premium, the term “principal” shall not include the premium with respect to which such calculation is being made.

“Redemption Date” shall mean the date specified for redemption of the Notes in accordance with the terms of the Notes and Section 3.01.

“SEC” means the Securities and Exchange Commission or any successor agency.

“Securities Act” means the Securities Act of 1933, as amended, and the rules and regulations promulgated by the SEC thereunder.

“Securities Custodian” means the custodian with respect to a Global Note (as appointed by DTC) or any successor Person thereto and shall initially be the Trustee.

“Stated Maturity” means, with respect to any Note, the date specified in such security as the fixed date on which the payment of principal of such Note is due and payable, including pursuant to any mandatory redemption provision (but excluding any provision providing for the repurchase of such security at the option of the holder thereof until the exercise of such option by such holder).

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“Subsidiary” means, with respect to any Person (the “parent”) at any date, any corporation, limited liability company, partnership, association or other entity the accounts of which would be consolidated with those of the parent in the parent’s consolidated financial statements if such financial statements were prepared in accordance with GAAP as of that date, as well as any other corporation, limited liability company, partnership, association or other entity of which securities or other ownership interests representing more than 50% of the equity or more than 50% of the ordinary voting power or, in the case of a partnership, more than 50% of the general partnership interests are, as of that date, owned, controlled or held by the parent or one or more Subsidiaries of the parent or by the parent and one or more Subsidiaries of the parent.

“Supplemental Indenture” has the meaning assigned to it in the recitals hereto.

“Total Capitalization” means, as at any time, the aggregate of (i) all amounts outstanding on such date classified as shareholders’ equity of the Company on such date, (ii) all amounts outstanding on such date classified as preferred or preference stock of the Company on such date, and (iii) all amounts of Funded Debt of the Company outstanding on such date determined on an unconsolidated basis.

“Trust Indenture Act” means the U.S. Trust Indenture Act of 1939, as amended (15 U.S.C. §§ 77aaa-77bbbb), as in effect on the date of this Indenture; provided, however, that in the event the Trust Indenture Act of 1939 is amended after such date, “Trust Indenture Act” means, to the extent required by any such amendments, the U.S. Trust Indenture Act of 1939, as so amended.

“Trustee” means the party named as such in the preamble to this Indenture until a successor replaces it in accordance with the applicable provisions of this Indenture and, thereafter, means such successor.

“Trust Officer” shall mean, when used with respect to the Trustee, any officer within the corporate trust department of the Trustee, including any vice president, assistant vice president, assistant secretary, trust officer or any other officer of the Trustee who customarily performs functions similar to those performed by the persons who at the time shall be such officers, respectively, or to whom any corporate trust matter is referred because of such person’s knowledge of and familiarity with the particular subject and who shall have direct responsibility for the administration of this Indenture.

“Uniform Commercial Code” means the New York Uniform Commercial Code, as in effect from time to time.

“United States” and “U.S.” means the United States of America.

“U.S. Government Obligations” means direct obligations (or certificates representing an ownership interest in such obligations) of the United States of America (including any agency or instrumentality thereof) for the payment of which the full faith and credit of the United States of America is pledged and that are not callable or redeemable at the Company’s option.

“Voting Stock” of any specified “person” (as that term is used in Section 13(d)(3) of the Exchange Act) as of any date means the Capital Stock of such person that is at the time entitled to vote generally in the election of the Board of Directors of such person.

Section 1.02. Other Definitions.

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Section 1.03. Incorporation by Reference of Trust Indenture Act. This Indenture is subject to the mandatory provisions of the Trust Indenture Act which are incorporated by reference in and made a part of this Indenture. The following terms in the Trust Indenture Act have the following meanings:

“indenture securities” means the Notes.

“indenture security holder” means a Holder or Noteholder.

“indenture to be qualified” means this Indenture.

“indenture trustee” or “institutional trustee” means the Trustee.

“obligor” on the indenture securities means the Company and any other obligor on the indenture securities, including any guarantor.

All other terms used in this Indenture that are defined by the Trust Indenture Act, defined by reference to another statute or defined by SEC rule have the meanings assigned to them by such definitions.

Section 1.04. Rules of Construction. For purposes of this Indenture, except as otherwise expressly provided herein or unless the context otherwise requires:

(i) all terms used in this Indenture that are not defined herein and that are used as defined by the Trust Indenture Act, defined by reference to another statute or defined by SEC rule have the meanings assigned to them by such definitions;

(ii) a term has the meaning assigned to it;

(iii) an accounting term not otherwise defined has the meaning assigned to it in accordance with GAAP;

(iv) “including” means including without limitation;

(v) words in the singular include the plural and words in the plural include the singular;

(vi) all references to Notes shall refer also to any Additional Notes issued in the form of Notes pursuant to Section 2.14;

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(vii) all references to the date the Notes were originally issued shall refer to the Issue Date or the date any Additional Notes were originally issued, as the case may be; and

(viii) all references herein to particular Sections or Articles shall refer to this Indenture unless otherwise so indicated.

Section 1.05. Conflicts with Base Indenture. In the event that any provision of this Supplemental Indenture limits, qualifies or conflicts with a provision of the Base Indenture, such provision of this Supplemental Indenture shall control.

ARTICLE 2

THE NOTES

Section 2.01. Form and Dating.

(a) Form of Notes. The Notes of shall be substantially in the form attached as Exhibit A, with such appropriate provisions as are required or permitted by this Indenture, and may have such letters, numbers or other marks of identification and such legends or endorsements placed thereon as may be required to comply with applicable laws or the rules of any securities exchange or DTC or as may, consistently herewith, be determined by the Officers of the Company executing such Notes, as evidenced by their execution thereof.

The Trustee’s certificate of authentication shall be substantially in the form set forth in this Article.

The Definitive Notes shall be printed, lithographed or engraved on a steel engraved border or on steel engraved borders or produced by any combination of these methods, if required by any securities exchange on which the Notes may be listed, or may be produced in any other manner permitted by the rules of any securities exchange on which the Notes may be listed, all as determined by the Officers of the Company executing such Notes, as evidenced by their execution of such Notes.

The Notes shall be issued on the Issue Date in the form of a permanent global Note (each, a “Global Note” and, collectively, the “Global Notes”), deposited with the Trustee, as custodian for DTC, duly executed by the Company, authenticated by the Trustee as hereinafter provided and dated the date of their authentication. Each Global Note may be represented by more than one certificate, if so required by DTC’s rules regarding the maximum principal amount to be represented by a single certificate. The aggregate principal amount of the Global Notes may from time to time be increased or decreased by adjustments made on the records of the Trustee, as custodian for DTC or its nominee, as hereinafter provided.

The principal of and interest on the Notes shall be payable at the office or agency of the Company maintained for such purpose in Las Vegas, Nevada, or at such other office or agency of the Company as may be maintained for such purpose pursuant to Section 2.03; provided, however, that at the option of the Company, each installment of interest may be paid by (i) check mailed to addresses of the Persons entitled thereto as such addresses shall appear on the Note Register or (ii) upon request of any Holder of at least $1,000,000 principal amount of Notes, wire transfer to an account located in the United States of America maintained by the payee. Payments in respect of Notes represented by a Global Note (including principal, premium, if any, and interest) shall be made by wire transfer of immediately available funds to the accounts specified by DTC.

(b) Denominations. The Notes shall be issuable only in fully registered form, without coupons, and only in denominations of $2,000 and any integral multiple of $1,000 in excess thereof.

(c) Legend for Global Notes. The Global Notes shall bear the following legend on the face thereof:

“UNLESS THIS CERTIFICATE IS PRESENTED BY AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY, A NEW YORK CORPORATION (“DTC”), TO THE COMPANY OR ITS AGENT FOR REGISTRATION OF TRANSFER, EXCHANGE OR PAYMENT, AND ANY CERTIFICATE ISSUED IS REGISTERED IN THE NAME OF CEDE & CO. OR IN SUCH OTHER NAME AS IS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF DTC (AND ANY PAYMENT IS MADE TO CEDE & CO. OR TO SUCH OTHER ENTITY AS IS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF DTC), ANY TRANSFER, PLEDGE OR OTHER USE HEREOF FOR VALUE OR OTHERWISE BY OR TO ANY PERSON IS WRONGFUL INASMUCH AS THE REGISTERED OWNER HEREOF, CEDE & CO., HAS AN INTEREST HEREIN. TRANSFERS OF THIS GLOBAL SECURITY SHALL BE LIMITED TO TRANSFERS IN WHOLE, BUT NOT IN PART, TO NOMINEES OF DTC OR TO A SUCCESSOR THEREOF OR SUCH SUCCESSOR’S NOMINEE AND TRANSFERS OF PORTIONS OF THIS GLOBAL SECURITY SHALL BE LIMITED TO TRANSFERS MADE IN ACCORDANCE WITH THE RESTRICTIONS SET FORTH IN THE SUPPLEMENTAL INDENTURE REFERRED TO ON THE REVERSE HEREOF.”

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(d) Book-Entry Provisions.

(i) This Section 2.01(d) shall apply only to Global Notes deposited with the Trustee, as custodian for DTC.

(ii) Each Global Note initially shall (x) be registered in the name of DTC or the nominee of DTC, (y) be delivered to the Trustee as custodian for DTC and (z) bear the legend set forth in Section 2.01(c).

(iii) Members of, or participants in, DTC (“Agent Members”) shall have no rights under this Indenture with respect to any Global Note held on their behalf by DTC or by the Trustee as the custodian of DTC or under such Global Note, and DTC shall be treated by the Company, the Trustee and any agent of the Company or the Trustee as the absolute owner of such Global Note for all purposes whatsoever. Notwithstanding the foregoing, nothing herein shall (x) prevent the Company, the Trustee or any agent of the Company or the Trustee from giving effect to any written certification, proxy or other authorization furnished by DTC, or (y) impair, as between DTC and its Agent Members, the operation of customary practices of DTC governing the exercise of the rights of a holder of a beneficial interest in any Global Note.

(iv) In connection with any transfer of a portion of the beneficial interest in a Global Note pursuant to subsection (e) of this Section 2.01 to beneficial owners who are required to hold Definitive Notes, the Securities Custodian shall reflect on its books and records the date and a decrease in the principal amount of such Global Note in an amount equal to the principal amount of the beneficial interest in the Global Note to be transferred, and the Company shall execute, and the Trustee shall authenticate and deliver, one or more Definitive Notes of like tenor and amount.

(v) In connection with the transfer of an entire Global Note to beneficial owners pursuant to subsection (e) of this Section 2.01, such Global Note shall be deemed to be surrendered to the Trustee for cancellation, and the Company shall execute, and the Trustee shall authenticate and deliver, to each beneficial owner identified by DTC in exchange for its beneficial interest in such Global Note, an equal aggregate principal amount of Definitive Notes of authorized denominations.

(vi) The registered holder of a Global Note may grant proxies and otherwise authorize any Person, including Agent Members and Persons that may hold interests through Agent Members, to take any action that a Holder is entitled to take under this Indenture or the Notes.

(e) Definitive Notes. Except as provided below, owners of beneficial interests in a Global Note shall not be entitled to have Notes represented by the Global Note registered in their name or to receive certificated Notes (“Definitive Notes”). If required to do so pursuant to any applicable law or regulation, beneficial owners may obtain Definitive Notes in exchange for their beneficial interests in a Global Note upon written request in accordance with DTC’s and the Registrar’s procedures. In addition, Definitive Notes shall be transferred to all beneficial owners in exchange for their beneficial interests in a Global Note if (x) DTC notifies the Company that it is unwilling or unable to continue as depository for such Global Note or DTC ceases to be a clearing agency registered under the Exchange Act, at a time when DTC is required to be so registered in order to act as depository, and in each case a successor depository is not appointed by the Company within 90 days of such notice, (y) the Company executes and delivers to the Trustee and Registrar an Officers’ Certificate stating that such Global Note shall be so exchangeable or (z) an Event of Default has occurred and is continuing with respect to the Notes and the Registrar has received a request from DTC to exchange the Global Note for Definitive Notes.

(f) Certificate of Authentication. The Trustee’s certificates of authentication shall be in substantially the following form:

TRUSTEE’S CERTIFICATE OF

AUTHENTICATION

This is one of the Notes referred

to in the within-mentioned Indenture.

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Dated:

Section 2.02. Execution and Authentication. An Officer of the Company shall sign the Notes for the Company by manual signature.

If an Officer of the Company whose signature is on a Note no longer holds that office at the time the Trustee authenticates the Note, the Note shall be valid nevertheless.

A Note shall not be valid until an authorized signatory of the Trustee manually authenticates the Note. The signature of the Trustee on a Note shall be conclusive evidence that such Note has been duly and validly authenticated and issued under this Indenture.

At any time and from time to time after the execution and delivery of this Indenture, the Company may deliver Notes executed by the Company to the Trustee for authentication. Each Note shall be dated the date of its authentication. The Trustee shall authenticate Notes for original issue upon receipt of, and shall be fully protected in relying upon:

Notwithstanding anything to the contrary contained herein, the Company may from time to time, without notice to or consent of the Holders, issue such additional principal amounts of Additional Notes as may be issued and authenticated pursuant to Section 2.14 of this Indenture, and Notes authenticated and delivered upon registration or transfer of, or in exchange for, or in lieu of, other Notes pursuant to Section 2.06, Section 2.08, Section 2.09, Section 3.06 or Section 9.04.

The Trustee may appoint an agent (the “Authenticating Agent”) reasonably acceptable to the Company to authenticate the Notes. Unless limited by the terms of such appointment, any such Authenticating Agent may authenticate Notes whenever the Trustee may do so. Each reference in this Indenture to authentication by the Trustee includes authentication by such Authenticating Agent.

In case the Company, pursuant to Article 5, shall be consolidated or merged with or into any other Person or shall sell, lease or convey all or substantially all of its properties or assets to any Person, and the Successor (if other than the Company), shall have executed an indenture supplemental hereto (if not otherwise a party to the Indenture) with the Trustee pursuant to Article 5, any of the Notes authenticated or delivered prior to such consolidation, merger, sale, lease or conveyance may, from time to time, at the request of such Successor, be exchanged for other Notes executed in the name of such Successor with such changes in phraseology and form as may be appropriate, but otherwise in substance of like tenor as the Notes surrendered for such exchange and of like principal amount; and the Trustee, upon Authentication Order of such Successor, shall authenticate and deliver Notes as specified in such order for the purpose of such exchange. If Notes shall at any time be authenticated and delivered in any new name of a Successor (if other than the Company) pursuant to this Section 2.02 in exchange or substitution for or upon registration of transfer of any Notes, such Successor, at the option of the Holders but without expense to them, shall provide for the exchange of all Notes at the time outstanding for Notes authenticated and delivered in such new name.

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In connection with the transfer, authentication or cancellation of any Notes by the Trustee, in addition to the other requirements of this Article 2 and Section 10.03, the Trustee may require that the Company deliver to the Trustee an Opinion of Counsel as provided in Section 7.02(b).

Section 2.03. Registrar and Paying Agent. The Company shall maintain an office or agency where Notes may be presented for registration of transfer or for exchange (the “Registrar”) and an office or agency where Notes may be presented for payment (the “Paying Agent”). The Registrar shall keep a register of the Notes and of their transfer and exchange. The Company may have one or more additional paying agents. The term “Paying Agent” includes any such additional paying agent. The Company may change the Registrar or appoint one or more co-Registrars without notice.

In the event the Company shall retain any Person not a party to this Indenture as a Paying Agent or Registrar hereunder, the Company shall enter into an appropriate agency agreement with any Registrar or Paying Agent not a party to this Indenture, which shall incorporate the applicable terms of the Trust Indenture Act. Such agency agreement shall implement the provisions of this Indenture that relate to such Paying Agent or Registrar. The Company shall notify the Trustee in writing of the name and address of each such Paying Agent or Registrar. If the Company fails to maintain a Registrar or Paying Agent, the Trustee shall act as such and shall be entitled to appropriate compensation therefor pursuant to Section 7.07. The Company shall be responsible for the fees and compensation of all Paying Agents and Registrars appointed or approved by it. Either the Company or any of its domestically incorporated wholly-owned Subsidiaries may act as a Registrar or Paying Agent.

The Company initially appoints the Trustee as Registrar and Paying Agent for the Notes.

Section 2.04. Paying Agent to Hold Money in Trust. By no later than 11:00 a.m. (New York City time) on the date on which any principal or interest on any Note is due and payable, the Company shall deposit with the applicable Paying Agent a sum sufficient to pay such principal or interest when due. The Company shall require each Paying Agent (other than the Trustee) to agree in writing that such Paying Agent shall hold in trust for the benefit of Noteholders or the Trustee all money held by such Paying Agent for the payment of principal of or interest on the Notes and shall notify the Trustee in writing of any Default by the Company in making any such payment. If either of the Company or any of its Subsidiaries acts as Paying Agent, it shall segregate the money held by it as Paying Agent and hold it as a separate trust fund. The Company at any time may require a Paying Agent (other than the Trustee) to pay all money held by it to the Trustee and to account for any funds disbursed by such Paying Agent. Upon complying with this Section 2.04, the Paying Agent (if other than the Company or a Subsidiary) shall have no further liability for the money delivered to the Trustee. Upon any bankruptcy, reorganization or similar proceeding with respect to the Company, the Trustee shall serve as Paying Agent for the Notes.

Section 2.05. Noteholder Lists. The Registrar shall preserve in as current a form as is reasonably practicable the most recent list available to it of the names and addresses of Noteholders. If the Trustee is not the Registrar, the Company shall cause the Registrar to furnish to the Trustee, in writing at least five Business Days before each Interest Payment Date and at such other times as the Trustee may request in writing, a list in such form and as of such date as the Trustee may reasonably require of the names and addresses of Noteholders.

Section 2.06. Transfer and Exchange. Notwithstanding any other provision of this Indenture or the Notes (other than Section 2.01(e) hereof), transfers and exchanges of Notes and beneficial interests in a Global Note of the kinds specified in this Section 2.06 shall be made only in accordance with this Section 2.06. The Registrar shall retain copies of all letters, notices and other written communications received pursuant to Section 2.01 or this Section 2.06. The Company shall have the right to inspect and make copies of all such letters, notices or other written communications at any reasonable time upon the giving of reasonable written notice to the Registrar.

(a) Transfer and Exchange of Definitive Notes for Definitive Notes. Upon request by a Holder of Definitive Notes and such Holder’s compliance with the provisions of this Section 2.06, the Registrar will register the transfer or exchange of Definitive Notes. Prior to such registration of transfer or exchange, the requesting Holder must present or surrender to the Registrar the Definitive Notes duly endorsed or accompanied by a written instruction of transfer in form satisfactory to the Registrar duly executed by such Holder or by its attorney, duly authorized in writing. In addition, the requesting Holder must provide any additional certifications, documents and information, as applicable, required pursuant to the following provisions of this Section 2.06. A Holder of Definitive Notes may transfer such Notes to a Person who takes delivery thereof in the form of a Definitive Note.

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(b) Transfer and Exchange of Definitive Notes for Beneficial Interests. A Holder of a Definitive Note may exchange such Note for a beneficial interest in a Global Note or transfer such Definitive Notes to a Person who takes delivery thereof in the form of a beneficial interest in a Global Note at any time. Upon receipt of a request for such an exchange or transfer, the Trustee shall cancel the applicable Definitive Note and increase or cause to be increased the aggregate principal amount of one of the Global Notes.

(c) Transfer or Exchange of Beneficial Interests for Definitive Notes. A beneficial interest in a Global Note may be exchanged for a Note that is not a Global Note as provided in Section 2.01(e).

(d) Transfer and Exchange of Beneficial Interests in the Global Notes. The transfer and exchange of beneficial interests in the Global Notes will be effected through the Depositary, in accordance with the provisions of this Indenture. Beneficial interests in any Global Note may be transferred to Persons who take delivery thereof in the form of a beneficial interest in a Global Note. No written orders or instructions shall be required to be delivered to the Registrar to effect the transfers described in this Section 2.06(d) and Section 2.06(c) hereof.

(e) Obligations with Respect to Transfers and Exchanges of Notes.

(i) To permit registrations of transfers and exchanges, the Company shall, subject to the other terms and conditions of this Article 2, execute and the Trustee shall authenticate Definitive Notes and Global Notes at the Registrar’s or co-Registrar’s request and upon a written order of the Company.

(ii) No service charge shall be made to a Holder for any registration of transfer or exchange, but the Company may require payment of a sum sufficient to cover any transfer tax, assessments, or similar governmental charge payable in connection therewith (other than any such transfer taxes, assessments or similar governmental charges payable upon exchange or transfer pursuant to Section 3.06 or Section 9.04).

(iii) Neither the Registrar nor the co-Registrar or the Issuer shall be required to register the transfer of or exchange of any Note for a period beginning (A) 15 days before the transmission of a notice of an offer to repurchase or redeem Notes and ending at the close of business on the day of such transmission or (B) 15 days before an Interest Payment Date and ending on such Interest Payment Date.

(iv) Prior to the due presentation for registration of transfer of any Note, the Company, the Trustee, the Paying Agent, the Registrar or any co-Registrar may deem and treat the person in whose name a Note is registered as the absolute owner of such Note for the purpose of receiving payment of principal of and interest on such Note and for all other purposes whatsoever, whether or not such Note is overdue, and none of the Company, the Trustee, the Paying Agent, the Registrar or any co-Registrar shall be affected by notice to the contrary.

(v) All Notes issued upon any transfer or exchange pursuant to the terms of this Indenture shall be the valid and legally binding obligation of the Company, shall evidence the same debt and shall be entitled to the same benefits under this Indenture as the Notes surrendered upon such transfer or exchange.

(f) No Obligation of the Trustee.

(i) The Trustee shall have no responsibility or obligation to any beneficial owner of a Global Note, a member of, or a participant in, DTC or other Person in respect of any aspect of the records, or for maintaining, supervising or reviewing any records, relating to beneficial ownership interests of a Global Note, with respect to the accuracy of the records of DTC or its nominee or of any participant or member thereof, with respect to any ownership interest in the Notes or with respect to the delivery to any participant, member, beneficial owner or other Person (other than DTC) of any notice (including any notice of redemption) or the payment of any amount or delivery of any Notes (or other security or property) under or with respect to such Notes. All notices and communications to be given to the Holders and all payments to be made to Holders in respect of the Notes shall be given or made only to or upon the order of the registered Holders (which shall be DTC or its nominee in the case of a Global Note). The rights of beneficial owners in any Global Note shall be exercised only through DTC subject to the applicable rules and procedures of DTC. The Trustee and the Company may conclusively rely and shall be fully protected in relying upon information furnished by DTC with respect to its members, participants and any beneficial owners.

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(ii) The Trustee shall have no obligation or duty to monitor, determine or inquire as to compliance with any restrictions on transfer imposed under this Indenture or under applicable law with respect to any transfer of any interest in any Note (including any transfers between or among Agent Members or beneficial owners of interests in any Global Note) other than to require delivery of such certificates and other documentation or evidence as are expressly required by, and to do so if and when expressly required by, the terms of this Indenture, and to examine the same to determine substantial compliance as to form with the express requirements hereof.

(g) Transfer and Exchange of Global Notes. A Global Note may not be transferred as a whole except by DTC to a nominee of DTC, by a nominee of DTC to DTC or to another nominee of DTC or by DTC or any such nominee to a successor depositary or to a nominee of such successor depositary.

Neither the Trustee nor any agent thereof shall have any responsibility for any actions taken or not taken by DTC or any successor depositary.

Section 2.07. Business Days. If a payment date is on a date that is not a Business Day, payment shall be made on the next succeeding day that is a Business Day, and no interest shall accrue on such payment for the intervening period. If a regular record date is on a day that is not a Business Day, the record date shall not be affected.

Section 2.08. Replacement Notes. If a mutilated Note is surrendered to the Registrar or if the Holder of a Note shall provide the Company and the Trustee with evidence to their satisfaction that the Note has been lost, destroyed or wrongfully taken, the Company shall issue and the Trustee shall authenticate a replacement Note if the requirements of Section 8-405 of the Uniform Commercial Code are met and the Holder satisfies any other reasonable requirements of the Trustee. In addition, such Holder shall furnish an indemnity or surety bond sufficient in the judgment of the Company and the Trustee to protect the Company, the Trustee, the Paying Agent and the Registrar from any loss that any of them may suffer if a Note is replaced. The Company and the Trustee may charge the Holder for their expenses in replacing a Note, including reasonable fees and expenses of counsel. Every replacement Note is an additional obligation of the Company.

Section 2.09. Outstanding Notes. Notes outstanding at any time are all Notes authenticated by the Trustee except for those cancelled, those delivered for cancellation, those for which payment or redemption money has been deposited or set aside in trust as described in Section 8.01 and those described in this Section 2.09 as not outstanding. A Note does not cease to be outstanding because the Company or an Affiliate of the Company holds the Note.

If a Note is replaced pursuant to Section 2.08, it ceases to be outstanding unless the Trustee and the Company receive proof satisfactory to them that the replaced Note is held by a bona fide purchaser.

If the Paying Agent segregates and holds in trust, in accordance with this Indenture, on a Redemption Date or Stated Maturity Date money sufficient to pay all principal and interest payable on that date with respect to the Notes (or portions thereof) to be redeemed or maturing, as the case may be, then on and after that date such Notes (or portions thereof) cease to be outstanding and interest on them ceases to accrue.

Section 2.10. Temporary Notes. Until Definitive Notes are ready for delivery, the Company may prepare and the Trustee shall authenticate and deliver temporary Notes. Temporary Notes shall be substantially in the form of Definitive Notes but may have variations that the Company considers appropriate for temporary Notes. Without unreasonable delay, the Company shall prepare and the Trustee shall authenticate and deliver Definitive Notes. After the preparation of Definitive Notes, the temporary Notes shall be exchangeable for Definitive Notes upon surrender of the temporary Notes at any office or agency maintained by the Company for that purpose and such exchange shall be without charge to the Holder. Upon surrender for cancellation of any one or more temporary Notes, the Company shall execute, and the Trustee shall authenticate and deliver in exchange therefor, one or more Definitive Notes representing an equal principal amount of Notes. Until so exchanged, the Holder of temporary Notes shall in all respects be entitled to the same benefits under this Indenture as a Holder of Definitive Notes.

Section 2.11. Cancellation. The Company at any time may deliver Notes to the Trustee for cancellation and such delivery shall be accompanied by an Officers’ Certificate in which the Company directs the Trustee to cancel such Notes. The Registrar and the Paying Agent shall forward to the Trustee for cancellation any Notes surrendered to them for registration of transfer or exchange or payment. The Trustee and no one else shall cancel (subject to the record retention requirements of the Exchange Act) all Notes surrendered for registration of transfer or exchange, payment or cancellation and, upon the written request of the Company, deliver a certificate of such cancellation to the Company. The Company may not issue new Notes to replace Notes it has redeemed, paid or delivered to the Trustee for cancellation, but this shall not prohibit the Company from issuing any Additional Notes. All cancelled Notes held by the Trustee may be disposed of by the Trustee in accordance with its then customary practices and procedures. The Trustee shall provide to the Company a list of all Notes that have been cancelled from time to time as requested in writing by the Company.

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Section 2.12. Defaulted Interest. If the Company defaults in a payment of interest on the Notes, the Company shall pay defaulted interest plus interest on such defaulted interest to the extent lawful at the rate specified therefor in the Notes in any lawful manner. The Company may pay the defaulted interest to the Persons who are Noteholders on a subsequent special record date. The Company shall fix or cause to be fixed any such special record date and payment date to the reasonable satisfaction of the Trustee, which specified record date shall not be less than 10 days prior to the payment date for such defaulted interest and shall promptly transmit or cause to be transmitted to each applicable Noteholder a notice that states the special record date, the payment date and the amount of defaulted interest to be paid. The Company shall notify the Trustee pursuant to an Officers’ Certificate of the amount of defaulted interest proposed to be paid on each Note and the date of the proposed payment, and at the same time the Company shall deposit with the Trustee an amount of money equal to the aggregate amount proposed to be paid in respect of such defaulted interest or shall make arrangements satisfactory to the Trustee for such deposit prior to the date of the proposed payment, such money when so deposited to be held in trust for the benefit of the Person entitled to such defaulted interest as provided in this Section 2.12.

Section 2.13. CUSIP Numbers, etc. The Company in issuing the Notes may use “CUSIP” or “ISIN” numbers and/or other similar numbers (if then generally in use), and, if so, the Trustee shall use “CUSIP” and/or “ISIN” numbers in notices of redemption or exchange as a convenience to Holders; provided, however, that any such notice may state that no representation is made as to the correctness of such numbers either as printed on the Notes or as contained in any notice of a redemption or exchange and that reliance may be placed only on the other identification numbers printed on the Notes, and any such redemption or exchange shall not be affected by any defect in or omission of such numbers. The Company shall promptly notify the Trustee in writing of any change in the CUSIP numbers and/or other similar numbers.

Section 2.14. Issuance of Additional Notes. The Company shall be entitled to issue, from time to time, Additional Notes under this Indenture, which shall have identical terms as the Initial Notes (in each case, other than with respect to the date of issuance, the issue price, the amount of interest payable on the first payment date applicable thereto and any changes necessary to conform to and ensure compliance with the Securities Act (or other applicable securities laws)), as the case may be; provided that if the Additional Notes are not fungible with the Notes for U.S. federal income tax purposes, the Additional Notes will have a separate CUSIP number.

With respect to any Additional Notes, the Company shall set forth in a Board Resolution and an Officers’ Certificate, copies of which shall be delivered to the Trustee, the following information:

(i) the aggregate principal amount of such Additional Notes to be authenticated and delivered pursuant to this Indenture; and

(ii) the issue price, the Issue Date and the “CUSIP” and “ISIN” number of any such Additional Notes and the amount of interest payable on the first payment date applicable thereto.

Section 2.15. One Class of Notes. The Notes and any Additional Notes shall vote and consent together on all matters as one class, and none of the Notes or any Additional Notes shall have the right to vote or consent as a separate class on any matter.

ARTICLE 3

REDEMPTION

Section 3.01. Applicability of this Article. Redemption of Notes, as permitted or required by any form of Note issued pursuant to this Indenture or the documentation providing therefor, shall be made in accordance with such form of Note or documentation and this Article 3; provided, however, that if any provision of any such form of Note or documentation shall conflict with any provision of this Article, the provision of such form of Note or documentation shall govern.

Section 3.02. Notices to Trustee; Selection of Notes to Be Redeemed. If the Company elects to redeem Notes pursuant to the terms thereof, it shall notify the Trustee in writing of the Redemption Date and the principal amount of Notes to be redeemed.

The Company shall give each notice to the Trustee provided for in this Section 3.02 at least 10 days before the Redemption Date unless the Trustee consents to a shorter period. Such notice shall be accompanied by an Officers’ Certificate from the Company to the effect that such redemption shall comply with the conditions herein. The record date relating to such redemption shall be selected by the Company and set forth in the related notice given to the Trustee, which record date shall be not less than 15 days prior to the date selected for redemption by the Company.

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If fewer than all the Notes then outstanding are to be redeemed, the Trustee shall select the Notes to be redeemed pro rata or by lot and in the case of Notes held in book entry form, in accordance with DTC’s applicable procedures.

Notes and portions thereof selected for redemption shall be in amounts of $2,000 or integral multiples of $1,000 in excess thereof. Provisions of this Indenture that apply to Notes called for redemption also apply to portions of Notes called for redemption. The Trustee shall promptly notify the Company of the Notes or portions of Notes to be redeemed.

Section 3.03. Notice of Redemption. At least 30 days but not more than 60 days before a date for redemption of Notes, the Company shall mail (or, in the case of Notes held in book-entry form, send by electronic transmission) a notice of redemption by first-class mail to each Holder of Notes to be redeemed at its registered address.

The notice shall identify the Notes to be redeemed and shall state:

(a) the aggregate amount of Notes to be redeemed;

(b) the Redemption Date;

(c) the redemption price (or the method of calculating such price) and the amount of accrued interest to be paid, if any;

(d) the name and address of the Paying Agent;

(e) that Notes called for redemption must be surrendered to the Paying Agent to collect the redemption price plus accrued and unpaid interest, if any;

(f) if fewer than all the outstanding Notes are to be redeemed, the certificate number (if certificated) and principal amounts of the particular Notes to be redeemed;

(g) that, unless the Company defaults in making such redemption payment, interest on Notes (or portion thereof) called for redemption ceases to accrue on and after the Redemption Date;

(h) the CUSIP number, or any similar number, if any, printed on the Notes being redeemed; and

(i) that no representation is made as to the correctness or accuracy of the CUSIP number, or any similar number, if any, listed in such notice or printed on the Notes.

At the Company’s written request (which may be rescinded or revoked at any time prior to the time at which the Trustee shall have given such notice to the Holders), the Trustee shall give the notice of redemption in the name of the Company and at the Company’s expense (which notice shall be sent by electronic transmission in the case of Notes held in book-entry form). In such event, the Company shall provide the Trustee with the information required by this Section 3.03 at least five Business Days prior to the date chosen for giving such notice to the Holders (unless the Trustee shall agree to a shorter period). The notice, if mailed in the manner herein provided, shall be conclusively presumed to have been given, whether or not the Holder receives such notice. In any case, failure to give such notice by mail or any defect in the notice to the Holder of any Note designated for redemption as a whole or in part shall not affect the validity of the proceedings for the redemption of any other Notes.

Section 3.04. Effect of Notice of Redemption. Once notice of redemption is mailed in accordance with Section 3.03, Notes called for redemption shall become due and payable on the Redemption Date and at the redemption price as stated in the notice. Upon surrender to the Paying Agent on the Redemption Date, such Notes shall be paid at the redemption price stated in the notice, plus accrued and unpaid interest to, but not including, the Redemption Date; provided that the Company shall have deposited the redemption price with the Paying Agent or the Trustee on or before 11:00 a.m. (New York City time) on the Redemption Date; provided, further, that if the Redemption Date is after a regular record date and on or prior to the Interest Payment Date, the accrued and unpaid interest shall be payable to the Noteholder of the redeemed Notes registered on the relevant record date. Failure to give notice or any defect in the notice to any Holder shall not affect the validity of the notice to any other Holder.

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Section 3.05. Deposit of Redemption Price. By no later than 11:00 a.m. (New York City time) on the Redemption Date, the Company shall deposit with the Paying Agent (or, if the Company or any of its Subsidiaries is the Paying Agent, shall segregate and hold in trust) an amount of money sufficient to pay the redemption price of and accrued and unpaid interest on all Notes to be redeemed on that date other than Notes or portions of Notes called for redemption that are owned by the Company or a Subsidiary and have been delivered by the Company or such Subsidiary to the Trustee for cancellation. All money, if any, earned on funds held by the Paying Agent shall be remitted to the Company. In addition, the Paying Agent shall promptly return to the Company any money deposited with the Paying Agent by the Company in excess of the amounts necessary to pay the redemption price of, and accrued interest, if any, on, all Notes to be redeemed.

Unless the Company defaults in the payment of such redemption price, interest on the Notes or portions of Notes to be redeemed shall cease to accrue on and after the applicable Redemption Date, whether or not such Notes are presented for payment.

Section 3.06. Notes Redeemed in Part. Upon surrender of a Note that is redeemed in part, the Company shall execute and the Trustee shall authenticate for the Holder thereof (at the Company’s expense) a new Note, equal in principal amount to the unredeemed portion of the Note surrendered; provided that each new Note shall be in a principal amount of $2,000 or an integral multiple of $1,000 in excess thereof.

ARTICLE 4

COVENANTS

Section 4.01. Payment of Notes. The Company covenants and agrees that it shall promptly pay the principal of and interest on the Notes on the dates and in the manner provided in the Notes and in this Indenture. Principal and interest shall be considered paid on the date due if, on or before 11:00 a.m. (New York City time) on such date, the Trustee or the Paying Agent (or, if the Company or any of its Subsidiaries is the Paying Agent, the segregated account or separate trust fund maintained by the Company or such Subsidiary pursuant to Section 2.04) holds in accordance with this Indenture money sufficient to pay all principal and interest then due.

The Company shall pay interest on overdue principal at the rate specified therefor in the Notes, and it shall pay interest on overdue installments of interest at the same rate to the extent lawful as provided in Section 2.12.

Notwithstanding anything to the contrary contained in this Indenture, the Company or the Paying Agent may, to the extent it is required to do so by law, deduct or withhold income or other similar taxes imposed by the United States of America or other domestic or foreign taxing authorities from principal or interest payments hereunder.

Section 4.02. Compliance Certificate. The Company will deliver to the Trustee, within 120 days after the end of each fiscal year of the Company ending after the date hereof, an Officers’ Certificate signed by its principal executive officer, principal financial officer or principal accounting officer which shall comply with Section 314 of the Trust Indenture Act, stating whether or not to the knowledge of the signers thereof any Default in the performance and observance of any of the terms, provisions and conditions of this Indenture (without regard to any period of grace or requirement of notice provided hereunder), specifying all such Defaults and the nature and status thereof of which they may have knowledge.

Section 4.03. Maintenance of Office or Agency. The Company shall maintain the office or agency required under Section 2.03. The Company shall give prior written notice to the Trustee of the location, and any change in the location, of such office or agency. If at any time the Company shall fail to maintain any such required office or agency or shall fail to furnish the Trustee with the address thereof, such presentations, surrenders, notices and demands may be made or served at the address of the Trustee set forth in Section 10.01.

Section 4.04. Existence. Except as otherwise permitted by Article 5, the Company shall do or cause to be done all things necessary to preserve and keep in full force and effect its existence as a corporation or other Person.

Section 4.05. Maintenance of Properties. The Company will cause all properties used or useful in the conduct of its business to be maintained and kept in good condition, repair and working order and supplied with all necessary equipment and will cause to be made all necessary repairs, renewals, replacements, betterments and improvements thereof, all as in the judgment of the Company may be necessary so that the business carried on in connection therewith may be properly and advantageously conducted at all times; provided, however, that nothing in this Section shall prevent the Company from discontinuing the operation or maintenance of any of such properties if such discontinuance is, in the judgment of the Company, desirable in the conduct of its business and not disadvantageous in any material respect to the Holders of the Notes.

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Section 4.06. Payment of Taxes and Other Claims. The Company will pay or discharge or cause to be paid or discharged, before the same shall become delinquent, (i) all taxes, assessments and governmental charges levied or imposed upon the Company or upon the income, profits or property of the Company, and (ii) all lawful claims for labor, materials and supplies which, if unpaid, might by law become a Lien upon the property of the Company; provided, however, that the Company shall not be required to pay or discharge or cause to be paid or discharged any such tax, assessment, charge or claim whose amount, applicability or validity is being contested in good faith by appropriate proceedings or if such failure to pay or discharge could not reasonably be expected to have a material adverse effect on the business, operations, affairs, financial condition, assets or properties of the Company and its subsidiaries taken as a whole or on the ability of the Company to pay the Notes in accordance with their terms.

Section 4.07. Restrictions on Liens.

(a) The Company will not, at any time during which any Notes are outstanding, issue, assume or guarantee any debt for money borrowed (hereinafter referred to as “Debt”) secured by any Lien upon any property or asset of the Company (whether such property or asset is now owned or hereafter acquired), without in any such case effectively securing, prior to or concurrently with the issuance, assumption or guarantee of any such Debt, the Notes (together with, if the Company shall so determine, any other indebtedness of or guarantee by the Company ranking equally with the Notes and then existing or thereafter created) equally and ratably with (or, at the Company’s option, prior to) such Debt, provided, however, that the foregoing restrictions shall not apply to or prevent the creation of:

(i) Liens on any property acquired, constructed or improved by the Company after the Issue Date that are created or assumed contemporaneously with, or within 120 days after, such acquisition or completion of the construction or improvement, or within six months thereafter pursuant to a firm commitment for financing arranged with a lender or investor within such 120-day period, to secure or provide for the payment of all or any part of the purchase price of such property or the cost of such construction or improvement incurred after the Issue Date, or, in addition to Liens contemplated by clauses (a)(ii) and (a)(iii) below, Liens on any property existing at the time of acquisition thereof, provided that the Liens do not apply to any property theretofore owned by the Company other than, in the case of any such construction or improvement, any theretofore unimproved property on which the property so constructed or the improvement is located;

(ii) existing Liens on any property or indebtedness of a Person that is merged with or into or consolidated with the Company; provided that the Liens shall not apply to any property theretofore owned by the Company;

(iii) Liens in favor of the United States of America, any state or any foreign country or any department, agency or instrumentality or political subdivision of any such jurisdiction to secure partial, progress, advance or other payment pursuant to any contract or statute or to secure any indebtedness incurred for the purpose of financing all or any part of the purchase price or cost of constructing or improving the property subject to such Liens, including, without limitation, Liens to secure Debt of the pollution control or industrial revenue bond type;

(iv) Liens on current assets of the Company to secure loans which mature within 12 months from the creation thereof and which are made in the ordinary course of business;

(v) Liens on any property (including any natural gas, oil or other mineral property) of the Company to secure all or part of the cost of exploration or drilling for or development of oil or gas reserves or laying a pipeline or to secure Debt incurred to provide funds for any such purpose;

(vi) any Lien existing on the Issue Date;

(vii) Liens on moneys or government obligations deposited with a trustee or agent for holders of Debt to defease such Debt; and

(viii) Liens for the sole purposes of extending, renewing or replacing, in whole or in part, Liens securing Debt of the type referred to in the foregoing clauses (a)(i) through (a)(vii), inclusive, or this clause (a)(viii); provided, however, that the principal amount of Debt so secured at the time of such extension, renewal or replacement (plus all accrued interest on the Debt and the amount of all fees and expenses, including premiums, incurred in connection therewith) may not be increased, and that such extension, renewal or replacement is limited to all or part of the property or indebtedness which secured the Lien so extended, renewed or replaced (plus improvements on such property).

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(b) The provisions of Section 4.07(a) shall not apply to the issuance, assumption or guarantee by the Company of Debt secured by a Lien which would otherwise be subject to such restrictions up to an aggregate amount that, together with all other Indebtedness of the Company (other than Debt secured by Liens permitted by Section 4.07(a)) that would otherwise be subject to such restrictions and the Value of all Sale and Lease-back Transactions in existence at such time (other than any Sale and Lease-back Transaction that, if such Sale and Lease-back Transaction had been a Lien, would have been permitted by Section 4.07(a)(i) and other than Sale and Lease-back Transactions as to which application of amounts have been made in accordance with Section 4.08(b)), does not at the time the Company issues, assumes or guarantees Debt secured by such Lien exceed 10% of Total Capitalization.

(c) “Value” means, with respect to a Sale and Lease-back Transaction, as at any time, the amount equal to the greater of:

(i) the net proceeds from the sale or transfer of the property leased pursuant to such Sale and Lease-back Transaction; and

(ii) the fair value, in the opinion of the Board of Directors of the Company, of such property at the time of entering into such Sale and Lease-back Transaction,

in either case divided first by the number of full years of the term of the lease and then multiplied by the number of full years of such term remaining at the time of determination, without regard to any renewal or extension options contained in the lease.

(d) If at any time the Company shall issue, assume or guarantee any Debt secured by any Lien and if Section 4.07(a) requires that the Notes be secured equally and ratably with such Debt, the Company will promptly deliver to the Trustee:

(i) an Officers’ Certificate stating that the covenant of the Company contained in Section 4.07(a) has been complied with; and

(ii) an Opinion of Counsel to the effect that such covenant has been complied with, and that any instrument executed by the Company in the performance of such covenant complies with such covenant.

(e) In the event that the Company shall hereafter secure the Notes equally and ratably with (or prior to) any other Debt or obligation pursuant to the provisions of this Section 4.07, the Trustee is hereby authorized to enter into an indenture or agreement supplemental hereto and to take such action, if any, as it may deem advisable to enable it to enforce effectively the rights of the holders so secured, equally and ratably with such Debt and other obligations; provided, however, that if such indenture or agreement affects the Trustee’s own rights, duties or immunities under this Indenture or otherwise, the Trustee may in its discretion, but shall not be obligated to, enter into such supplemental indenture or agreement.

Section 4.08. Restrictions on Sale and Lease-back Transactions. The Company will not enter into any direct or indirect arrangement with any Person providing for the lease to the Company of any property of the Company (except for temporary leases for a term, including any renewal thereof, of not more than three years), which property has been or is to be sold or transferred by the Company to such Person or to any other Person by whom funds have been or are to be advanced on the security of such property (a “Sale and Lease-back Transaction”) unless the proceeds of such sale are at least equal to the fair value of such property being sold and leased-back and either:

(a) the Company would be entitled, pursuant to the provisions of Section 4.07(a)(i) or Section 4.07(b) to incur Debt secured by a Lien on such property without equally and ratably securing the Notes; or

(b) within 180 days of the effective date of the Sale and Lease-back Transaction, the Company applies, or covenants that it will apply, an amount not less than the fair value of such property to one or more of:

(i) the payment or other retirement of Funded Debt incurred or assumed by the Company which ranks senior to or pari passu with the Notes (other than Funded Debt owned by the Company), or

(ii) the purchase of property at not more than its fair value (other than the property involved in such sale).

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ARTICLE 5

CONSOLIDATION, MERGER AND SALE OF ASSETS

Section 5.01. When the Company or any Guarantor May Merge or Transfer Assets. The Company or any guarantor shall not consolidate with or sell, lease or convey all or substantially all of its properties or assets to, or merge with or into, in one transaction or a series of related transactions, any other Person, unless:

(a) the Company or such guarantor, as the case may be, shall be the continuing Person or, alternatively, the successor Person formed by or resulting from such consolidation or merger, or the Person that receives the transfer of such properties or assets (the “Successor”) shall be a Person organized under the laws of the United States of America, any State thereof or the District of Columbia and the Successor (if not the Company or such guarantor, as the case may be) shall expressly assume, by supplemental indenture, executed and delivered to the Trustee, in form reasonably satisfactory to the Trustee, all the obligations of the Company under the applicable Notes and this Indenture or of such guarantor under its guarantee of the applicable Notes by executing a supplemental indenture to this Indenture;

(b) immediately after giving effect to such transaction and treating any indebtedness which becomes an obligation of the Company as a result of such transaction having been incurred by the Company at the time of such transaction, no Default or Event of Default shall have occurred and be continuing;

(c) if, as a result of any such consolidation or merger or such conveyance, transfer or lease, properties or assets of the Company would become subject to a Lien which would not be permitted by this Indenture, the Company or such successor Person, as the case may be, shall take such steps as shall be necessary effectively to secure the Notes equally and ratably with (or prior to) all indebtedness secured thereby; and

(d) the Company shall have delivered to the Trustee an Officers’ Certificate and an Opinion of Counsel, each stating that such consolidation, merger, conveyance or transfer and such supplemental indenture (if any) comply with this Indenture and that such supplemental indenture constitutes the legal, valid and binding obligation of the Successor subject to customary exceptions.

Section 5.02. Successor Person Substituted. The applicable Successor will succeed to, and be substituted for, and may exercise every right and power of, the Company or such guarantor, as the case may be, under the Indenture or the respective guarantee of the applicable Notes. The Company or such guarantor, as the case may be, shall be relieved of all obligations and covenants under the Notes, the respective guarantee of such Notes and the Indenture; provided that in the case of a lease of all or substantially all of the Company’s or such guarantor’s, as the case may be, property or assets, the Company or such guarantor, as the case may be, will not be released from the obligation to pay the principal of and premium, if any, and interest on such Notes. Notwithstanding the provisions of this Article 5, any guarantor may merge with or into or transfer all or part of its properties or assets to another guarantor or to the Company.

ARTICLE 6

DEFAULTS AND REMEDIES

Section 6.01. Events of Default. An “Event of Default” occurs with respect to the Notes if:

(a) a Default in any payment of interest on any Note when the same becomes due and payable occurs, and such Default continues for a period of 30 days;

(b) a Default in the payment of the principal of or premium, if any, on any Note when the same becomes due and payable at its Stated Maturity occurs, upon optional redemption or otherwise;

(c) the Company or any guarantor fails to comply with any of its agreements in the Notes, this Indenture or any guarantee of the Notes, as applicable (other than those referred to in (a) or (b) above) and such failure continues for 60 days after the notice specified below;

(d) a default under any bond, debenture, note or other evidence of indebtedness for money borrowed by the Company in an individual principal amount outstanding of at least $50,000,000 or under any mortgage, indenture or instrument under which there may be issued or by which there may be secured or evidenced any indebtedness for money borrowed by the Company in an individual principal amount outstanding of at least $50,000,000, whether such indebtedness now exists or shall hereafter be created, which default shall constitute a failure to pay $50,000,000 or more of the principal of such indebtedness when due and payable after the expiration of any applicable grace period with respect thereto or which default shall have resulted in such indebtedness becoming or being declared due and payable prior to the date on which it would otherwise have become due and payable, without such payment being made in full or such acceleration having been rescinded or annulled, within a period of 30 days after the notice specified below;

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(e) any guarantee with respect to the Notes ceases for any reason to be, or is asserted by the Company or the guarantor not to be, in full force and effect and enforceable in accordance with its terms except to the extent contemplated by this Indenture and any such guarantee of such Notes;

(f) the Company or any guarantor of the Notes pursuant to or within the meaning of any Bankruptcy Law:

(i) commences a voluntary case;

(ii) consents to the entry of an order for relief against it in an involuntary case in which it is the debtor;

(iii) consents to the appointment of a Custodian of it or for any substantial part of its property;

(iv) makes a general assignment for the benefit of its creditors; or

(v) takes any comparable action under any foreign laws relating to insolvency;

(g) a court of competent jurisdiction enters an order or decree under any Bankruptcy Law that:

(i) is for relief against the Company or any guarantor of the Notes in an involuntary case;

(ii) appoints a Custodian of the Company or any guarantor of the Notes or for any substantial part of the property of the Company or any guarantor of the Notes; or

(iii) orders the winding up or liquidation of the Company or any guarantor;

(or any similar relief is granted under any foreign laws) and the order, decree or relief remains unstayed and in effect for 60 consecutive days.

The foregoing will constitute Events of Default whatever the reason for any such Event of Default and whether it is voluntary or involuntary or is effected by operation of law or pursuant to any judgment, decree or order of any court or any order, rule or regulation of any administrative or governmental body.

The term “Bankruptcy Law” means Title 11, United States Code, or any similar Federal or state law for the relief of debtors. The term “Custodian” means any receiver, trustee, assignee, liquidator, custodian or similar official under any Bankruptcy Law.

A Default with respect to Notes under clause (c) and (d) of this Section 6.01 is not an Event of Default until the Trustee (by written notice to the Company) or the Holders of at least 25% in aggregate principal amount of the outstanding Notes (by written notice to the Company and the Trustee) gives notice of the Default and the Company does not cure such Default within the time specified in said clause (c) or (d), as applicable, after receipt of such notice. Such notice must specify the Default, demand that it be remedied and state that such notice is a “Notice of Default.”

The Company shall deliver to the Trustee, within 30 days after the occurrence thereof, written notice in the form of an Officers’ Certificate of any event that with the giving of notice or the lapse of time would become an Event of Default under clauses (c) through (g) of this Section 6.01, its status and what action the Company is taking or proposes to take with respect thereto.

Section 6.02. Acceleration. If an Event of Default with respect to Notes (other than an Event of Default specified in Sections 6.01(f) or 6.01(g) with respect to the Company) occurs and is continuing, the Trustee by written notice to the Company, or the Holders of at least 25% in aggregate principal amount of the outstanding Notes by written notice to the Company and the Trustee, may, and the Trustee at the request of such Holders, shall, declare the principal of and accrued but unpaid interest on all the Notes to be due and payable. Upon such a declaration, such principal and accrued and unpaid interest shall be due and payable immediately. If an Event of Default specified in Section 6.01(f) or 6.01(g) with respect to the Company occurs and is continuing, the principal of and accrued and unpaid interest on all Notes shall ipso facto become and be immediately due and payable without any declaration or other act on the part of the Trustee or any Holders. The Holders of a majority in aggregate principal amount of the outstanding Notes by written notice to the Trustee may rescind an acceleration and its consequences if all existing Events of Default with respect to Notes have been cured or waived except nonpayment of principal or interest that has become due solely because of such acceleration. No such rescission shall affect any subsequent Default or impair any right consequent thereto.

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Section 6.03. Other Remedies. If an Event of Default occurs and is continuing, the Trustee, in conformity with its duties under this Indenture, will exercise all rights or powers under this Indenture at the request or direction of any Holders of such Notes, provided, that such Holders provide the Trustee with an indemnity and/or security reasonably satisfactory to the Trustee against any loss, liability or expense.

The Trustee may maintain a proceeding even if it does not possess any of the Notes or does not produce any of them in the proceeding. A delay or omission by the Trustee or any Noteholder in exercising any right or remedy accruing upon an Event of Default shall not impair the right or remedy or constitute a waiver of or acquiescence in the Event of Default. No remedy is exclusive of any other remedy. All available remedies are, to the extent permitted by law, cumulative.

Section 6.04. Waiver of Past or Existing Defaults. The Holders of a majority in aggregate principal amount of the Notes then outstanding by written notice to the Trustee may, on behalf of the Holders of the Notes, waive any past or existing Default and its consequences except (a) a Default in the payment of the principal of or interest on a Note or (b) a Default in respect of a provision that under Section 9.02 cannot be amended without the consent of each affected Noteholder. When a Default is waived, it is deemed cured, and any Event of Default arising therefrom shall be deemed to have been cured, for every purpose of this Indenture, but no such waiver shall extend to any subsequent or other Default or impair any consequent right.

Section 6.05. Control by Majority. Upon provision of security and/or indemnity reasonably satisfactory to the Trustee, the Holders of a majority in aggregate principal amount of the Notes then outstanding may direct the time, method and place of conducting any proceeding for any remedy available to the Trustee with respect to the Notes or of exercising any trust or power conferred on the Trustee. However, the Trustee, which may conclusively rely on opinions of counsel, may refuse to follow any direction that conflicts with law or this Indenture or that the Trustee determines is unduly prejudicial to the rights of other Noteholders or would involve the Trustee in personal liability; provided, however, that the Trustee may take any other action deemed proper by the Trustee that is not inconsistent with such direction.

Section 6.06. Limitation on Suits. Except to enforce the right to receive payment of principal, premium, if any, or interest when due, a Holder of Notes may not pursue any remedy with respect to this Indenture or the Notes unless:

(a) an Event of Default shall have occurred and be continuing and the Holder gives to the Trustee prior written notice stating that an Event of Default is continuing;

(b) the Holders of at least 25% in aggregate principal amount of the Notes then outstanding (including any Additional Notes) make a written request to the Trustee to pursue the remedy;

(c) such Holder or Holders offer to the Trustee security and/or indemnity reasonably satisfactory to it against any loss, liabilities or expenses in compliance with such request;

(d) the Trustee does not comply with the request within 60 days after receipt of the request and the offer of security or indemnity; and

(e) the Holders of a majority in aggregate principal amount of the Notes then outstanding do not give the Trustee a direction inconsistent with the request during such 60-day period.

A Noteholder may not use this Indenture to prejudice the rights of another Noteholder or to obtain a preference or priority over another Noteholder (it being understood that the Trustee shall not have an affirmative duty to ascertain whether or not such actions or forbearances are unduly prejudicial to such Noteholders).

Section 6.07. Rights of Holders to Receive Payment. Notwithstanding any other provision of this Indenture, the right of any Holder to receive payment of principal of and interest on the Notes held by such Holder, on or after the respective due dates expressed in such Notes, or to bring suit for the enforcement of any such payment on or after such respective dates, shall not be impaired or affected without the consent of such Holder.

Section 6.08. Collection Suit by Trustee. If an Event of Default specified in Section 6.01(a) occurs and is continuing, the Trustee may recover judgment in its own name and as trustee of an express trust against the Company for the whole amount then due and owing (together with interest on any unpaid interest to the extent lawful) and the amounts provided for in Section 7.07.

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Section 6.09. Trustee May File Proofs of Claim. The Trustee may file such proofs of claim and other papers or documents as may be necessary or advisable in order to have the claims of the Trustee (including any claim for the reasonable compensation, expenses, disbursements and advances of the Trustee, its agents and counsel) and the Noteholders allowed in any judicial proceedings relative to the Company, its creditors or any other obligor upon the Notes, or any of their creditors or the property of the Company or such other obligor or their creditors and, unless prohibited by law or applicable regulations, may vote on behalf of the Holders in any election of a trustee in bankruptcy or other Person performing similar functions, and any Custodian in any such judicial proceeding is hereby authorized by each Holder to make payments to the Trustee and, in the event that the Trustee shall consent to the making of such payments directly to the Holders, to pay to the Trustee any amount due it for the reasonable compensation, expenses, disbursements and advances of the Trustee, its agents and its counsel, and any other amounts due the Trustee under Section 7.07.

Section 6.10. Priorities. Any money or other property collected by the Trustee pursuant to Article 6 hereof, or any money or other property otherwise distributable in respect of the Company’s obligations under this Indenture, shall be applied in the following order:

FIRST: to the Trustee (including any predecessor Trustee) and its agents for amounts due under this Indenture, including without limitation, Section 7.07 hereto;

SECOND: to Noteholders for amounts due and unpaid on the Notes for principal and interest, ratably, without preference or priority of any kind, according to the amounts due and payable on the Notes for principal and interest, respectively; and

THIRD: to the Company.

The Trustee may, upon prior written notice to the Company, fix a record date and payment date for any payment to Noteholders pursuant to this Section 6.10. At least 15 days before such record date, the Company shall mail to each Noteholder and the Trustee a notice that states the record date, the payment date and amount to be paid.

Section 6.11. Undertaking for Costs. In any suit for the enforcement of any right or remedy under this Indenture or in any suit against the Trustee for any action taken or omitted by it as Trustee, a court in its discretion may require the filing by any party litigant in the suit of an undertaking to pay the costs of the suit, and the court in its discretion may assess reasonable costs, including reasonable attorneys’ fees and expenses, against any party litigant in the suit, having due regard to the merits and good faith of the claims or defenses made by the party litigant. This Section 6.11 does not apply to a suit by the Trustee, a suit by a Holder pursuant to Section 6.07 or a suit by Holders of more than 10% in aggregate principal amount of the outstanding Notes.

Section 6.12. Waiver of Stay or Extension Laws. The Company (to the extent it may lawfully do so) shall not at any time insist upon, or plead, or in any manner whatsoever claim or take the benefit or advantage of, any stay or extension law wherever enacted, now or at any time hereafter in force, which may affect the covenants or the performance of this Indenture; and the Company (to the extent that it may lawfully do so) hereby expressly waives all benefit or advantage of any such law, and shall not hinder, delay or impede the execution of any power herein granted to the Trustee, but shall suffer and permit the execution of every such power as though no such law had been enacted.

ARTICLE 7

TRUSTEE

Section 7.01. Duties of Trustee. (a) If an Event of Default has occurred and is continuing, the Trustee shall exercise the rights and powers vested in it by this Indenture and use the same degree of care and skill in its exercise as a prudent Person would exercise or use under the circumstances in the conduct of such Person’s own affairs.

(b) Except during the continuance of an Event of Default:

(i) the Trustee undertakes to perform such duties and only such duties as are specifically set forth in this Indenture and no implied covenants or obligations shall be read into this Indenture against the Trustee; and

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(ii) in the absence of bad faith on its part, the Trustee may conclusively rely, as to the truth of the

statements and the correctness of the opinions expressed therein, upon certificates and opinions furnished to the Trustee and conforming to the requirements of this Indenture. However, in the case of any such certificates and opinions which by any provision hereof are specifically required to be furnished to the Trustee, the Trustee shall examine such certificates and opinions to determine whether or not they conform to the requirements of this Indenture (but need not confirm or investigate the accuracy of mathematical calculations or other facts stated therein).

(c) The Trustee may not be relieved from liability for its own negligent action, its own negligent failure to act or its own willful misconduct, except that:

(i) this subsection does not limit the effect of subsections (b) or (f) of this Section 7.01;

(ii) the Trustee shall not be liable for any error of judgment made in good faith by a Trust Officer unless it is proved that the Trustee was negligent in ascertaining the pertinent facts; and

(iii) the Trustee shall not be liable with respect to any action it takes or omits to take in good faith in accordance with a direction received by it pursuant to Section 6.05.

(d) [Reserved].

(e) The Trustee shall not be liable for interest on any money or other property received by it or for holding moneys or other property uninvested, in either case, except as otherwise agreed between the Company and the Trustee. Money and other property held in trust by the Trustee shall, until used or applied as herein provided, be held in trust for the purposes for which they were received, but need not be segregated from other money or property except to the extent required by law.

(f) No provision of this Indenture shall require the Trustee to expend or risk its own funds or otherwise incur any liability, financial or otherwise, in the performance of any of its duties hereunder or in the exercise of any of its rights or powers, if it shall have reasonable grounds to believe that repayment of such funds or adequate indemnity against such risk or liability is not reasonably assured to it.

(g) Every provision of this Indenture relating to the conduct or affecting the liability of or affording protection to the Trustee shall be subject to the provisions of this Section 7.01 and to the provisions of the Trust Indenture Act, where applicable.

Section 7.02. Rights of Trustee. (a) The Trustee may conclusively rely on, and shall be protected in acting or refraining from acting in reliance on, any document believed by it to be genuine and to have been signed or presented by the proper person. The Trustee need not investigate any fact or matter stated in the document.

(b) Before the Trustee acts or refrains from acting, it may require an Officers’ Certificate or an Opinion of Counsel, or both. The Trustee shall not be liable for any action it takes or omits to take in good faith in reliance on the Officers’ Certificate or Opinion of Counsel.

(c) The Trustee may execute any of the trusts or powers or perform any duties hereunder either directly or through attorneys and agents, respectively, and shall not be responsible for the misconduct or negligence of any attorney or agent appointed with due care by it hereunder.

(d) The Trustee shall not be liable for any action it takes, suffers to exist or omits to take in good faith which it believes to be authorized or within its rights or powers conferred upon it by this Indenture.

(e) The Trustee may consult with counsel of its selection, and the advice or opinion of counsel with respect to legal matters relating to this Indenture and the Notes shall be full and complete authorization and protection from liability in respect to any action taken, omitted or suffered by it hereunder in good faith and in reliance thereon.

(f) The Trustee shall be under no obligation to exercise any of the rights or powers vested in it by this Indenture at the request or direction of any of the Holders pursuant to this Indenture, unless such Holders shall have offered to the Trustee security or indemnity satisfactory to it against the costs, expenses and liabilities which might be incurred by it in compliance with such request or direction.

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(g) The Trustee shall not be charged with knowledge of any Default or Event of Default with respect to the Notes

unless written notice of such Default or Event of Default shall have been given to a Trust Officer of the Trustee at the Corporate Trust Office by the Company or any other obligor on the Notes or by any Holder of the Notes. Any such notice shall reference this Indenture and the Notes.

(h) The rights, privileges, protections, immunities and benefits given to the Trustee pursuant to this Indenture, including its rights to be indemnified, are extended to, and shall be enforceable by, the Trustee in each of its capacities as Registrar and Paying Agent, as the case may be, hereunder.

(i) The Trustee shall not be bound to make any investigation into the facts or matters stated in any resolution, certificate, statement, instrument, opinion, report, notice, request, direction, consent, order, bond, debenture, note, other evidence of Indebtedness or other paper or document, but the Trustee, in its discretion, may make such further reasonable inquiry or reasonable investigation into such facts or matters as it may see fit, and, if the Trustee shall determine to make such further inquiry or investigation, it shall be entitled, upon reasonable notice and at reasonable times, to examine the books, records and premises of the Company, personally or by agent or attorney at the sole cost of the Company and shall incur no liability or additional liability of any kind by reason of such inquiry or investigation.

(j) The Trustee shall not be required to give any bond or surety in respect of the performance of its powers and duties hereunder.

(k) The Trustee may request that the Company deliver a certificate setting forth the names of individuals and/or titles of Officers of the Company authorized at such time to take specified actions pursuant to this Indenture.

(l) In no event shall the Trustee be responsible or liable for special, indirect, punitive or consequential loss or damage of any kind whatsoever (including, but not limited to, loss of profit) irrespective of whether the Trustee has been advised of the likelihood of such loss or damage and regardless of the form of action.

Section 7.03. Individual Rights of Trustee. The Trustee in its individual or any other capacity may become the owner or pledgee of Notes and may otherwise deal with the Company with the same rights it would have if it were not Trustee. Any Paying Agent, Registrar or co-paying agent may do the same with like rights. However, the Trustee must comply with Sections 7.10 and 7.11.

Section 7.04. Trustee’s Disclaimer. The Trustee shall not be responsible for and makes no representation as to the validity or adequacy of this Indenture or the Notes, it shall not be accountable for the Company’s use of the proceeds from the Notes, and it shall not be responsible for any statement of the Company in this Indenture or in any document issued in connection with the sale of the Notes or in the Notes other than the Trustee’s certificate of authentication.

Section 7.05. Notice of Defaults. If a Default or an Event of Default occurs with respect to the Notes and is continuing and a Trust Officer receives written notice of such Default or Event of Default, the Trustee shall transmit to each Noteholder notice of Default within 60 days after written notice of it is received by a Trust Officer of the Trustee. Except in the case of a Default in payment of principal of or interest on any Note, the Trustee may withhold the notice if and so long as it in good faith determines that withholding the notice is not opposed to the interests of Noteholders.

Section 7.06. Reports by Trustee to Holders. As promptly as practicable after each May 15 beginning with the May 15 following the date of this Indenture, and in any event prior to July 15 in each year, the Trustee shall mail to each Noteholder a brief report dated as of such May 15 that complies with Section 313(a) of the Trust Indenture Act. The Trustee also shall comply with Section 313(b) of the Trust Indenture Act. The Trustee shall promptly deliver to the Company a copy of any report it delivers to Holders pursuant to this Section 7.06.

A copy of each report at the time of its mailing to Noteholders shall be filed by the Trustee with the SEC and each stock exchange (if any) on which the Notes are listed. The Company agrees to notify promptly the Trustee in writing whenever the Notes become listed on any stock exchange and of any delisting thereof.

Section 7.07. Compensation and Indemnity. The Company covenants and agrees to pay to the Trustee (and any predecessor Trustee) from time to time such compensation for its services as the Company and the Trustee shall from time to time mutually agree in writing. The Trustee’s compensation shall not be limited by any law on compensation of a trustee of an express trust. The Company shall reimburse the Trustee upon request for all reasonable out-of-pocket expenses (including attorneys’ fees and expenses), disbursements and advances incurred or made by it in accordance with the provisions of this Indenture, including costs of collection, in addition to such compensation for its services, except any such expense, disbursement or advance as shall be determined to have been caused by its own negligence or willful misconduct. Such

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expenses shall include the reasonable compensation and expenses, disbursements and advances of the Trustee’s agents and counsel. The Trustee shall provide the Company reasonable notice of any expenditure not in the ordinary course of business. The Company shall indemnify each of the Trustee, its officers, directors, employees and any predecessor Trustees against any and all loss, damage, claim (whether asserted by the Company, a Holder or any other Person) liability or expense (including reasonable attorneys’ fees and expenses) (other than taxes applicable to the Trustee’s compensation hereunder) incurred by it in connection with the acceptance or administration of this trust and the performance of its duties hereunder. The Trustee shall notify the Company promptly of any claim of which a Trust Officer has received written notice and for which it may seek indemnity. Failure by the Trustee so to notify the Company shall not relieve the Company of its obligations hereunder. The Company shall defend the claim and the Trustee shall cooperate, to the extent reasonable, in the defense of any such claim, and, if (in the sole judgment of counsel to the Trustee) the facts and/or issues surrounding the claim are reasonably likely to create a conflict with the Company, the Company shall pay the reasonable fees and expenses of separate counsel to the Trustee. The Company need not reimburse any expense or indemnify against any loss, liability or expense incurred by the Trustee through the Trustee’s own willful misconduct or negligence. The Company need not pay for any settlement made without its consent, which consent shall not be unreasonably withheld or delayed.

To secure the Company’s payment obligations in this Section 7.07, the Trustee (including any predecessor trustee) shall have a lien prior to the Notes on all money or property held or collected by the Trustee other than money or property held in trust to pay principal of and interest on particular Notes.

The Company’s payment obligations pursuant to this Section 7.07 shall survive the satisfaction, discharge and termination of this Indenture, the resignation or removal of the Trustee and any discharge of this Indenture including any discharge under any bankruptcy law. In addition to and without prejudice to the rights provided to the Trustee under any of the provisions of this Indenture, when the Trustee incurs expenses or renders services after the occurrence of a Default specified in Section 6.01(f) or 6.01(g) with respect to the Company, the expenses and the compensation for the services are intended to constitute expenses of administration under Bankruptcy Law.

Section 7.08. Replacement of Trustee. The Trustee may resign at any time upon 30 days’ written notice to the Company. The Holders of a majority in principal amount of the Notes then outstanding, may remove the Trustee upon 30 days’ written notice to the Trustee and may appoint a successor Trustee, which successor Trustee shall be reasonably acceptable to the Company. The Company shall remove the Trustee if:

(a) the Trustee fails to comply with Section 7.10;

(b) the Trustee is adjudged bankrupt or insolvent;

(c) a receiver or other public officer takes charge of the Trustee or its property; or

(d) the Trustee otherwise becomes incapable of acting.

If the Trustee resigns, is removed by the Company or by the Holders of a majority in principal amount of the Notes and such Holders do not reasonably promptly appoint a successor Trustee, or if a vacancy exists in the office of Trustee for any reason (the Trustee in such event being referred to herein as the retiring Trustee), the Company shall promptly appoint a successor Trustee.

A successor Trustee shall deliver a written acceptance of its appointment to the retiring Trustee and to the Company and the Company shall pay all amounts due and owing to the Trustee under Section 7.07 of the Indenture. Thereupon the resignation or removal of the retiring Trustee shall become effective, and the successor Trustee shall have all the rights, powers and duties of the Trustee under this Indenture. The successor Trustee shall mail a notice of its succession to Noteholders affected by such resignation or removal. The retiring Trustee shall promptly transfer all property held by it as Trustee to the successor Trustee, subject to the lien provided for in Section 7.07.

If a successor Trustee does not take office with respect to the Notes within 30 days after the retiring Trustee resigns or is removed, the retiring Trustee or the Holders of 10% in principal amount of the Notes may petition at the expense of the Company any court of competent jurisdiction for the appointment of a successor Trustee.

If the Trustee fails to comply with Section 7.10, any Noteholder may petition any court of competent jurisdiction for the removal of the Trustee and the appointment of a successor Trustee.

Notwithstanding the replacement of the Trustee pursuant to this Section 7.08, the Company’s obligations under

Section 7.07 shall continue for the benefit of the retiring Trustee.

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Section 7.09. Successor Trustee by Merger. If the Trustee consolidates with, merges or converts into, or transfers all or substantially all its corporate trust business or assets to, another corporation or banking association, the resulting, surviving or transferee corporation without any further act shall be the successor Trustee; provided that such corporation shall be otherwise qualified and eligible under this Article 7 and Section 310(a) of the Trust Indenture Act, without the execution or filing of any paper or any further act on the part of the parties hereto.

In case at the time such successor or successors by merger, conversion or consolidation to the Trustee shall succeed to the trusts created by this Indenture any of the Notes shall have been authenticated but not delivered, any such successor to the Trustee may adopt the certificate of authentication of any predecessor trustee, and deliver such Notes so authenticated; and in case at that time any of the Notes shall not have been authenticated, any successor to the Trustee may authenticate such Notes either in the name of any predecessor hereunder or in the name of the successor to the Trustee; and in all such cases such certificates shall have the full force which it is anywhere in the Notes or in this Indenture provided that the certificate of the Trustee shall have.

Section 7.10. Eligibility; Disqualification. The Trustee shall at all times satisfy the requirements of Section 310(a) of the Trust Indenture Act. The Trustee shall have a combined capital and surplus of at least $50,000,000 as set forth in its most recent published annual report of condition. The Trustee shall comply with Section 310(b) of the Trust Indenture Act; provided, however, that there shall be excluded from the operation of Section 310(b)(1) of the Trust Indenture Act and any indenture or indentures under which other securities or certificates of interest or participation in other securities of the Company are outstanding if the requirements for such exclusion set forth in Section 310(b)(1) of the Trust Indenture Act are met.

Nothing herein shall prevent the Trustee from filing with the SEC the application referred to in the second to last paragraph of Section 310(b) of the Trust Indenture Act.

Section 7.11. Preferential Collection of Claims Against the Company. The Trustee shall comply with Section 311(a) of the Trust Indenture Act, excluding any creditor relationship listed in Section 311(b) of the Trust Indenture Act. A Trustee who has resigned or been removed shall be subject to Section 311(a) of the Trust Indenture Act to the extent indicated.

ARTICLE 8

DISCHARGE OF INDENTURE; DEFEASANCE

Section 8.01. Discharge of Liability on Notes; Defeasance. (a) When (i) the Company delivers to the Trustee all outstanding Notes that have not already been delivered to the Trustee for cancellation or (ii) (A) all outstanding Notes have become due and payable, whether at maturity, as a result of repayment at the option of the Holders or as a result of the mailing of a notice of redemption pursuant to Article 3 hereof or (B) the Notes shall become due and payable at their Stated Maturity within one year, or the Notes are to be called for redemption within one year under arrangements satisfactory to the Trustee for the giving of notice of redemption by the Trustee in the name, and at the expense, of the Company, and, in each case of this clause (ii), the Company or any guarantor, if applicable, irrevocably deposits or causes to be deposited with the Trustee funds sufficient to pay at maturity or upon redemption all outstanding Notes, including interest thereon to maturity or such Redemption Date, and if, in the case of either clause (i) or (ii), the Company or any guarantor, if applicable, pays all other sums payable hereunder by the Company and any guarantor, if applicable, then this Indenture shall, subject to Section 8.01(c), cease to be of further effect. The Trustee shall acknowledge satisfaction and discharge of this Indenture on demand of the Company or any guarantor, if applicable, accompanied by an Officers’ Certificate and an Opinion of Counsel that all conditions precedent provided herein for satisfaction and discharge of this Indenture have been complied with at the cost and expense of the Company.

(b) Subject to Section 8.01(c) and Section 8.02, the Company at any time may terminate (i) all of its obligations and the obligations of any guarantors under the Notes, the applicable guarantees and this Indenture as it relates to such Notes and related guarantees (“legal defeasance option”) or (ii) its obligations, and the obligations of any guarantor, under Sections 4.02, 4.03 and 4.04, Article 5 and the operation of Sections 6.01(c) and 6.01(e) as it relates to the Notes and related guarantees (“covenant defeasance option”). The Company may exercise its legal defeasance option as it relates to the Notes notwithstanding its prior exercise of its covenant defeasance option as it relates to such Notes.

If the Company exercises its legal defeasance option with respect to the Notes, payment of the Notes may not be accelerated because of an Event of Default. If the Company exercises its covenant defeasance option, payment of the Notes may not be accelerated because of an Event of Default specified in Sections 6.01(c) or 6.01(e).

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Upon satisfaction of the conditions set forth herein and upon request of the Company the Trustee shall acknowledge in writing the discharge of those obligations that the Company terminates.

(c) Notwithstanding clauses (a) and (b) above, the Company’s or any guarantor’s, if applicable, obligations in Sections 2.03, 2.04, 2.05, 2.08, 4.01, 7.07, 7.08, 8.04, 8.05 and 8.06 shall survive until the Notes have been paid in full. Thereafter, the Company’s and the Trustee’s obligations in Sections 7.07, 8.04 and 8.05 shall survive such satisfaction and discharge.

Section 8.02. Conditions to Defeasance. The Company may exercise its legal defeasance option or its covenant defeasance option with respect to the Notes only if:

(a) the Company or any guarantor, if applicable, irrevocably deposits or causes to be deposited in trust with the Trustee money or U.S. Government Obligations or a combination thereof that through the scheduled payment of principal and interest in respect thereof in accordance with their terms shall provide cash at such times and in such amounts as shall be sufficient to pay principal, any premium and interest when due on all outstanding Notes (except Notes replaced pursuant to Section 2.08) to maturity or redemption, as the case may be;

(b) the Company delivers to the Trustee a certificate from a nationally recognized firm of independent accountants or valuation consultants expressing their opinion that the payments of principal and interest when due and without reinvestment on the deposited U.S. Government Obligations plus any deposited money without investment shall provide cash at such times and in such amounts as shall be sufficient to pay principal and interest when due on all outstanding Notes to maturity or redemption, as the case may be;

(c) 91 days pass after the deposit is made and during such 91-day period no Default specified in Sections 6.01(f) or 6.01(g) occurs that is continuing at the end of the period;

(d) the Company shall have delivered to the Trustee an Officers’ Certificate stating that the deposit was not made by the Company or any guarantor, if applicable, with the intent of defeating, hindering, delaying or defrauding any creditors of the Company or any guarantor, if applicable;

(e) in the case of the legal defeasance option, the Company shall have delivered to the Trustee an Opinion of Counsel stating that (i) the Company has received from, or there has been published by, the Internal Revenue Service a ruling, or (ii) since the date of this Indenture there has been a change in the applicable federal income tax law, in either case to the effect that, and based thereon such Opinion of Counsel shall confirm that, the Holders of Notes will not recognize income, gain or loss for U.S. federal income tax purposes as a result of such deposit and defeasance and will be subject to U.S. federal income tax on the same amounts, in the same manner and at the same times as would have been the case if such deposit and defeasance had not occurred;

(f) in the case of the covenant defeasance option, the Company shall have delivered to the Trustee an Opinion of Counsel to the effect that the Holders of Notes will not recognize income, gain or loss for U.S. federal income tax purposes as a result of such deposit and defeasance and will be subject to U.S. federal income tax on the same amounts, in the same manner and at the same times as would have been the case if such deposit and defeasance had not occurred; and

(g) the Company delivers to the Trustee an Officers’ Certificate and an Opinion of Counsel, each stating that all conditions precedent to the defeasance and discharge of the Notes as contemplated by this Indenture have been complied with.

Before or after a deposit, the Company may make arrangements satisfactory to the Trustee for the redemption of any of the Notes at a future date in accordance with Article 3.

Section 8.03. Application of Trust Money. The Trustee shall hold in trust money or U.S. Government Obligations deposited with it pursuant to this Article 8. It shall apply the deposited money and the money from U.S. Government Obligations either directly or through the Paying Agent as the Trustee may determine and in accordance with this Indenture to the payment of principal of and interest on the Notes that were defeased.

Section 8.04. Repayment to the Company. The Trustee and the Paying Agent shall promptly turn over to the Company upon request any excess money or securities held by them at any time.

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Subject to any applicable abandoned property law, the Trustee and the Paying Agent shall pay to the Company upon written request any money held by them for the payment of principal or interest that remains unclaimed for two years after the date of payment of such principal and interest, and, thereafter, Noteholders entitled to the money must look to the Company for payment as general creditors.

Any unclaimed funds held by the Trustee pursuant to this Section 8.04 shall be held uninvested and without any liability for interest.

Section 8.05. Indemnity for Government Obligations. The Company shall pay and shall indemnify the Trustee against any tax, fee or other charge imposed on or assessed against deposited U.S. Government Obligations or the principal and interest received on such U.S. Government Obligations other than any such tax, fee or other charge which by law is for the account of the Holders of the defeased Notes; provided that the Trustee shall be entitled to charge any such tax, fee or other charge to such Holder’s account.

Section 8.06. Reinstatement. If the Trustee or Paying Agent is unable to apply any money or U.S. Government Obligations in accordance with this Article 8 by reason of any legal proceeding or by reason of any order or judgment of any court or governmental authority enjoining, restraining or otherwise prohibiting such application, the Company’s obligations under this Indenture as it relates to the defeased Notes and such Notes shall be revived and reinstated as though no deposit had occurred pursuant to this Article 8 until such time as the Trustee or Paying Agent is permitted to apply all such money or U.S. Government Obligations in accordance with this Article 8; provided, however, that (a) if the Company has made any payment of interest on or principal of the Notes following the reinstatement of its obligations, the Company shall be subrogated to the rights of the Holders of the particular Notes to receive such payment from the money or U.S. Government Obligations held by the Trustee or Paying Agent and (b) unless otherwise required by any legal proceeding or any order or judgment of any court or governmental authority, the Trustee or Paying Agent shall return all such money and U.S. Government Obligations to the Company promptly after receiving a written request therefor at any time, if such reinstatement of the Company’s obligations has occurred and continues to be in effect.

ARTICLE 9

AMENDMENTS

Section 9.01. Without Consent of Holders. The Company and the Trustee may amend this Indenture or the Notes without notice to or consent of any Noteholder:

(a) to cure any ambiguity, omission, defect or inconsistency;

(b) to evidence the succession of another Person to the Company (or any guarantor) and the assumption by any such successor of the obligations of the Company (or those of any guarantor) in accordance with the provisions of Article 5;

(c) to add any additional Events of Default;

(d) to add to the covenants of the Company for the benefit of the Holders of all the Notes or to surrender any right or power herein conferred upon the Company;

(e) to add one or more guarantees for the benefit of Holders of the Notes or to release one or more guarantees in accordance with this Indenture or any supplemental indenture hereto;

(f) add collateral security with respect to the Notes;

(g) to add or appoint a successor or separate Trustee or other agent;

(h) to provide for the issuance of any Additional Notes;

(i) to comply with any requirements in connection with qualifying this Indenture under the Trust Indenture Act;

(j) to comply with the rules of any applicable securities depository;

(k) to provide for uncertificated Notes in addition to or in place of certificated Notes; provided, however, that the uncertificated Notes are issued in registered form for purposes of Section 163(f) of the Code;

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(l) to conform the provisions of this Indenture to the “Description of Notes,” “Description of the Notes and Guarantees,” “Description of Debt Securities” and any similar sections of any offering memorandum or prospectus prepared in connection with the issuance of the Notes (with the basis for any such amendment pursuant to this clause (l) to be set forth in an Officers’ Certificate);

(m) to change any other provision if the change does not adversely affect the interests of any Noteholder.

After an amendment under this Section 9.01 becomes effective, the Company shall mail to the Noteholders a notice briefly describing such amendment. The failure to give such notice to all Noteholders, or any defect therein, shall not impair or affect the validity of an amendment under this Section 9.01.

Section 9.02. With Consent of Holders. The Company and the Trustee may amend this Indenture or the Notes without notice to any Noteholder but with the written consent of the Holders of at least a majority in principal amount of the Notes then outstanding (including consents obtained in connection with a tender offer or exchange for Notes). However, without the consent of each affected Noteholder, an amendment may not:

(a) change the Stated Maturity of the principal of, or installment of interest on, any Note;

(b) reduce the principal amount of, or the rate of interest on, any Notes;

(c) reduce any premium payable on the redemption or required repurchase of any Note or change the date on which any Note may or must be redeemed, repaid or required to be repurchased;

(d) change the coin or currency in which the principal of, premium, if any, or interest on any Note is payable;

(e) impair the right of any Holder to institute suit for the enforcement of any payment on or after the Stated Maturity of any Note;

(f) reduce the percentage in principal amount of the outstanding Notes, the consent of whose Holders is required in order to take certain actions;

(g) reduce the requirements for quorum or voting by Holders in this Indenture or the Notes;

(h) modify any of the provisions of this Indenture regarding the waiver of past defaults and the waiver of certain covenants by Holders except to increase any percentage vote required or to provide that certain other provisions of the Indenture cannot be modified or waived without the consent of the holder of each Note affected thereby; or

(i) modify any of the above provisions of this Section 9.02.

It shall not be necessary for the consent of the Holders under this Section 9.02 to approve the particular form of any proposed amendment, but it shall be sufficient if such consent approves the substance thereof.

After an amendment under this Section 9.02 becomes effective, the Company shall mail to Noteholders a notice briefly describing such amendment. The failure to give such notice to all Noteholders, or any defect therein, shall not impair or affect the validity of an amendment under this Section 9.02.

Section 9.03. Effect of Consents and Waivers. A consent to an amendment, supplement or a waiver by a Holder of a Note shall bind the Holder and every subsequent Holder of that Note or portion of the Note that evidences the same debt as the consenting Holder’s Note, even if notation of the consent or waiver is not made on the Note. After an amendment or waiver becomes effective with respect to the Notes, it shall bind every Noteholder.

The Company may, but shall not be obligated to, fix a record date for the purpose of determining the Noteholders entitled to give their consent or take any other action described above or required or permitted to be taken pursuant to this Indenture. If a record date is fixed, then notwithstanding the immediately preceding paragraph, those Persons who were Noteholders at such record date (or their duly designated proxies), and only those Persons, shall be entitled to give such consent or to take any such action, whether or not such Persons continue to be Holders after such record date.

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Section 9.04. Notation on or Exchange of Notes. If an amendment changes the terms of a Note, the Trustee may require the Holder of the Note to deliver it to the Trustee. The Company shall provide in writing to the Trustee an appropriate notation to be placed on the Note regarding the changed terms and return it to the Holder. Alternatively, if the Company or the Trustee so determine, the Company in exchange for the Note shall issue and the Trustee shall authenticate a new Note that reflects the changed terms. Failure to make the appropriate notation or to issue a new Note shall not affect the validity of such amendment.

Section 9.05. Trustee to Sign Amendments. The Trustee shall sign any amendment authorized pursuant to this Article 9 if the amendment does not adversely affect the rights, duties, liabilities or immunities of the Trustee. If it does, the Trustee may but need not sign it. In signing such amendment the Trustee shall receive indemnity reasonably satisfactory to it. In signing any amendment the Trustee shall receive, and (subject to Section 7.01) shall be fully protected in conclusively relying upon, in addition to the documents required by Section 10.03, an Officers’ Certificate and an Opinion of Counsel stating that such amendment is authorized or permitted by this Indenture and that such supplemental indenture constitutes the legal valid and binding obligation of the Company in accordance with its terms subject to customary exceptions.

Upon the execution of any supplemental indenture under this Article 9, this Indenture shall be modified in accordance therewith, and such supplemental Indenture shall form a part of this Indenture for all purposes; and every Noteholder theretofore or thereafter authenticated and delivered hereunder shall be bound thereby.

Section 9.06. Compliance with Trust Indenture Act. Every amendment to this Indenture or the Notes shall comply with the Trust Indenture Act as then in effect.

ARTICLE 10

MISCELLANEOUS

Section 10.01. Notices. Except as otherwise provided herein, any notice or communication shall be in writing (including facsimile and electronic communications in PDF format) and delivered in person or mailed by first-class mail addressed as follows:

if to the Company and any guarantors:

Southwest Gas Corporation

5241 Spring Mountain Road

Post Office Box 98510

Las Vegas, Nevada 89193-8510

Attention: Kenneth J. Kenny

Facsimile: (702) 876-7117

Email: ken.kenny@swgas.com

with a copy to:

Morrison & Foerster LLP

425 Market Street

San Francisco, California 94105

Attention: Brandon C. Parris, Esq.

Facsimile: (415) 268-7522

Email: bparris@mofo.com

if to the Trustee:

The Bank of New York Mellon Trust Company, N.A.

2 N. LaSalle Street. 7th Floor

Chicago, Illinois 60602

Attention: Corporate Trust Administration

Facsimile: (312) 827-8522

The Trustee agrees to accept and act upon instructions or directions pursuant to this Indenture sent by unsecured e-mail, pdf, facsimile transmission or other similar unsecured electronic methods, provided, however, that the Trustee shall have received an incumbency certificate listing persons designated to give such instructions or directions and containing specimen signatures of such designated persons, which such incumbency certificate shall be amended and replaced whenever

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a person is to be added or deleted from the listing. If the Company elects to give the Trustee e-mail or facsimile instructions (or instructions by a similar electronic method) and the Trustee in its discretion elects to act upon such instructions, the Trustee’s understanding of such instructions shall be deemed controlling. The Trustee shall not be liable for any losses, costs or expenses arising directly or indirectly from the Trustee’s reliance upon and compliance with such instructions notwithstanding such instructions conflict or are inconsistent with a subsequent written instruction. The Company agrees to assume all risks arising out of the use of such electronic methods to submit instructions and directions to the Trustee, including without limitation the risk of the Trustee acting on unauthorized instructions, and the risk of interception and misuse by third parties.

Notwithstanding any other provision of this Indenture or any Note, where this Indenture or any Note provides for notice of any event or any other communication (including any notice of redemption or repurchase) to a holder of a Global Note (whether by mail or otherwise), such notice shall be sufficiently given if given to the Depositary (or its designee) pursuant to the standing instructions from the Depositary or its designee, including by electronic mail in accordance with accepted practices at the Depositary.

Any notice or communication mailed to a Noteholder shall be mailed to the Noteholder at the Noteholder’s address as it appears on the registration books of the Registrar and shall be sufficiently given if so mailed within the time prescribed.

Failure to mail a notice or communication to a Noteholder or any defect in it shall not affect its sufficiency with respect to other Noteholders. If a notice or communication is mailed in the manner provided above, it is duly given, whether or not the addressee receives it.

Section 10.02. Communication by Holders with Other Holders. Noteholders may communicate pursuant to Section 312(b) of the Trust Indenture Act with other Noteholders with respect to their rights under this Indenture or the Notes. The Company, the Trustee, the Registrar and anyone else shall have the protection of Section 312(c) of the Trust Indenture Act.

Section 10.03. Certificate and Opinion as to Conditions Precedent. Upon any request or application by the Company to the Trustee to take or refrain from taking any action under this Indenture, the Company shall furnish to the Trustee:

(a) an Officers’ Certificate in form reasonably satisfactory to the Trustee stating that, in the opinion of the signers, all conditions precedent, if any, provided for in this Indenture relating to the proposed action have been complied with; and

(b) an Opinion of Counsel in form reasonably satisfactory to the Trustee stating that, in the opinion of such counsel, all such conditions precedent have been complied with.

Section 10.04. Statements Required in Certificate or Opinion. The certificate or opinion with respect to compliance with a covenant or condition provided for in this Indenture shall include:

(a) a statement that the individual making such certificate or opinion has read such covenant or condition;

(b) a brief statement as to the nature and scope of the examination or investigation upon which the statements or opinions contained in such certificate or opinion are based;

(c) a statement that, in the opinion of such individual, he has made such examination or investigation as is necessary to enable him to express an informed opinion as to whether or not such covenant or condition has been complied with; and

(d) a statement as to whether or not, in the opinion of such individual, such covenant or condition has been complied with.

Section 10.05. When Notes Disregarded. In determining whether the Holders of the required principal amount of Notes have concurred in any direction, waiver or consent, Notes owned by the Company or by any Person directly or indirectly controlling or controlled by or under direct or indirect common control with the Company shall be disregarded and deemed not to be outstanding, except that, for the purpose of determining whether the Trustee shall be protected in conclusively relying on any such direction, waiver or consent, only Notes which a Trust Officer of the Trustee actually knows are so owned shall be so disregarded. Also, subject to the foregoing, only Notes outstanding at the time shall be considered in any such determination.

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Section 10.06. Rules by Trustee, Paying Agent and Registrar. The Trustee may make reasonable rules for action by or a meeting of Noteholders. The Registrar and the Paying Agent may make reasonable rules for their functions.

Section 10.07. Governing Law. This Indenture and the Notes shall be governed by, and construed in accordance with, the laws of the State of New York (including Section 5-1401 of the General Obligations Law of the State of New York but otherwise without regard to principles of conflicts of laws).

Section 10.08. No Recourse Against Others. A director, Officer, employee or shareholder (other than the Company), as such, of the Company shall not have any liability for any obligations of the Company under the Notes or this Indenture or for any claim based on, in respect of or by reason of such obligations or their creation. By accepting a Note, each Noteholder shall waive and release all such liability. The waiver and release shall be part of the consideration for the issue of the Notes.

Section 10.09. Successors. All agreements of the Company in this Indenture and the Notes shall bind its successors and assigns. All agreements of the Trustee in this Indenture shall bind its successors and assigns.

Section 10.10. Multiple Originals. The parties may sign any number of copies of this Indenture. Each signed copy shall be an original, but all of them together represent the same agreement. One signed copy is enough to prove this Indenture. The exchange of copies of this Indenture and of signature pages by facsimile or PDF transmission shall constitute effective execution and delivery of this Indenture as to the parties hereto and may be used in lieu of the original Indenture and signature pages for all purposes.

Section 10.11. Variable Provisions. The Company initially appoints the Trustee as Paying Agent and Registrar and custodian with respect to any Global Notes.

Section 10.12. Table of Contents; Headings. The table of contents, cross-reference sheet and headings of the Articles and Sections of this Indenture have been inserted for convenience of reference only, are not intended to be considered a part hereof and shall not modify or restrict any of the terms or provisions hereof.

Section 10.13. Waiver of Jury Trial. EACH OF THE COMPANY, THE HOLDERS AND THE TRUSTEE HEREBY IRREVOCABLY WAIVES, TO THE FULLEST EXTENT PERMITTED BY APPLICABLE LAW, ANY AND ALL RIGHT TO TRIAL BY JURY IN ANY LEGAL PROCEEDING ARISING OUT OF OR RELATING TO THIS INDENTURE, THE NOTES OR THE TRANSACTION CONTEMPLATED HEREBY.

Section 10.14. Force Majeure. In no event shall the Trustee be responsible or liable for any failure or delay in the performance of its obligations hereunder arising out of or caused by, directly or indirectly, forces beyond its control, including, without limitation, strikes, work stoppages, accidents, acts of war or terrorism, civil or military disturbances, nuclear or natural catastrophes or acts of God, and interruptions, loss or malfunctions of utilities, communications or computer (software and hardware) services; it being understood that the Trustee shall use reasonable efforts which are consistent with accepted practices in the banking industry to resume performance as soon as practicable under the circumstances.

Section 10.15. U.S.A. Patriot Act. The parties hereto acknowledge that in accordance with Section 326 of the USA Patriot Act (Title III of Pub. L. 107-56 (signed into law October 26, 2001)) (the “U.S.A. Patriot Act”), the Trustee, like all financial institutions and in order to help fight the funding of terrorism and money laundering, is required to obtain, verify, and record information that identifies each person or legal entity that establishes a relationship or opens an account with the Trustee. The parties to this Indenture agree that they will provide the Trustee with such information as it may request in order for the Trustee to satisfy the requirements of the U.S.A. Patriot Act.

Section 10.16. Trust Indenture Act Controls. If any provision of this Indenture limits, qualifies or conflicts with the duties imposed by, or with another provision included or that is required to be included in this Indenture by the Trust Indenture Act, the duty or provision required by the Trust Indenture Act shall control.

Section 10.17. Foreign Account Tax Compliance Act (FATCA). In order to comply with applicable tax laws, rules and regulations (inclusive of directives, guidelines and interpretations promulgated by competent authorities) in effect from time to time (“Applicable Law”), the Company agrees (i) to provide to The Bank of New York Mellon Trust Company, N.A., upon request, such information in its possession regarding holders or other applicable parties and/or transactions (including any modification to the terms of such transactions) so The Bank of New York Mellon Trust Company, N.A. can determine whether it has tax related obligations under Applicable Law and (ii) that The Bank of New York Mellon Trust Company, N.A. shall be entitled to make such withholding or deduction from payments under the Indenture as may be necessary to comply with Applicable Law. The terms of this section shall survive the termination of this Indenture.

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Section 10.18. Electronic Signatures. Exchange and delivery of signature pages for the Base Indenture, this Supplemental Indenture and the Notes via facsimile or electronic signature shall constitute effective execution, delivery and authentication of such documents.

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IN WITNESS WHEREOF, the parties have caused this First Supplemental Indenture to be duly executed as of the date first written above.

(Signature Page to Supplemental Indenture)

EXHIBIT A

[FORM OF FACE OF NOTE]

[UNLESS THIS CERTIFICATE IS PRESENTED BY AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY, A NEW YORK CORPORATION (“DTC”), TO THE COMPANY OR ITS AGENT FOR REGISTRATION OF TRANSFER, EXCHANGE OR PAYMENT, AND ANY CERTIFICATE ISSUED IS REGISTERED IN THE NAME OF CEDE & CO. OR IN SUCH OTHER NAME AS IS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF DTC (AND ANY PAYMENT IS MADE TO CEDE & CO. OR TO SUCH OTHER ENTITY AS IS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF DTC), ANY TRANSFER, PLEDGE OR OTHER USE HEREOF FOR VALUE OR OTHERWISE BY OR TO ANY PERSON IS WRONGFUL INASMUCH AS THE REGISTERED OWNER HEREOF, CEDE & CO., HAS AN INTEREST HEREIN. TRANSFERS OF THIS GLOBAL SECURITY SHALL BE LIMITED TO TRANSFERS IN WHOLE, BUT NOT IN PART, TO NOMINEES OF DTC OR TO A SUCCESSOR THEREOF OR SUCH SUCCESSOR’S NOMINEE AND TRANSFERS OF PORTIONS OF THIS GLOBAL SECURITY SHALL BE LIMITED TO TRANSFERS MADE IN ACCORDANCE WITH THE RESTRICTIONS SET FORTH IN THE SUPPLEMENTAL INDENTURE REFERRED TO ON THE REVERSE HEREOF.] (1)

SOUTHWEST GAS CORPORATION

2.200% SENIOR NOTES DUE 2030

CUSIP NO 845011 AC9

ISIN NO US845011AC92

Southwest Gas Corporation, a California corporation, for value received, promises to pay to, or registered assigns, the principal sum of Four Hundred Fifty Million Dollars ($450,000,000) [(subject to adjustment as reflected in the Schedule of Increases and Decreases in Global Note attached hereto)] on June 15, 2030.

Interest Payment Dates: June 15 and December 15 of each year, commencing on December 15, 2020.

Record Dates: June 1 and December 1 of each year.

Additional provisions of this Note are set forth on the other side of this Note.

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IN WITNESS WHEREOF, SOUTHWEST GAS CORPORATION has caused this Note to be duly executed.

Dated: June 4, 2020

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TRUSTEE’S CERTIFICATE OF

AUTHENTICATION

This is one of the Notes referred to

in the within-mentioned Indenture.

The Bank of New York Mellon Trust Company, N.A., as Trustee

Dated: June 4, 2020

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[FORM OF REVERSE SIDE OF NOTE]

[Reverse of Note]

2.200% Senior Notes due 2030

1. Interest

Southwest Gas Corporation, a California corporation (together with its successors and assigns under the Indenture hereinafter referred to, being herein called the “Company”), promises to pay interest on the principal amount of this Note at the rate of 2.200% per annum.

The Company shall pay interest semiannually on June 15 and December 15 of each year (each such date, an “Interest Payment Date”), commencing on December 15, 2020. Interest on the Notes shall accrue from June 4, 2020, or from the most recent date to which interest has been paid on the Notes. Interest shall be computed on the basis of a 360-day year comprised of twelve 30-day months.

2. Method of Payment

By no later than 11:00 a.m. (New York City time) on the date on which any principal of or interest on any Note is due and payable, the Company shall irrevocably deposit with the Trustee or the Paying Agent money sufficient to pay such principal and/or interest. The Company shall pay interest (except defaulted interest) to the Persons who are registered Holders of Notes at the close of business on the June 1 or December 1 immediately preceding the Interest Payment Date even if Notes are cancelled, repurchased or redeemed after the record date and on or before the Interest Payment Date. Holders must surrender Notes to a Paying Agent to collect principal payments. The Company shall pay principal and interest in money of the United States of America that at the time of payment is legal tender for payment of public and private debts. Payments in respect of Notes represented by a Global Note (including principal, premium, if any, and interest) shall be made by the transfer of immediately available funds to the accounts specified by The Depository Trust Company. The Company may make all payments in respect of a Definitive Note (including principal, premium, if any, and interest) by mailing a check to the registered address of each Holder thereof or by wire transfer to an account located in the United States of America maintained by the payee.

3. Paying Agent and Registrar

The Bank of New York Mellon Trust Company, N.A., a national banking association (the “Trustee”), shall initially act as Paying Agent and Registrar. The Company may appoint and change any Paying Agent or Registrar without notice to any Noteholder. The Company or any of its domestically organized wholly-owned Subsidiaries may act as Paying Agent.

4. Indenture

The Company issued the Notes under the Indenture dated as of June 4, 2020 (the “Base Indenture,” supplemented by the First Supplemental Indenture dated as of June 4, 2020 (the “Supplemental Indenture,” and together with the Base Indenture, the “Indenture”)), between the Company and the Trustee. The terms of the Notes include those stated in the Indenture and those made part of the Indenture by reference to the Trust Indenture Act of 1939 (15 U.S.C. §§ 77aaa-77bbbb) as in effect on the date of the Indenture (the “Trust Indenture Act”). Terms used herein and not defined herein have the meanings ascribed thereto in the Indenture. The Notes are subject to all such terms, and Noteholders are referred to the Indenture and the Trust Indenture Act for a statement of those terms. To the extent any provision of this Note conflicts with the express provisions of the Indenture, the provisions of the Indenture shall govern and be controlling.

The Notes are senior unsecured obligations of the Company. The Note is one of the Notes referred to in the Indenture. The Notes include the Notes issued on the Issue Date and any Additional Notes issued in accordance with Section 2.14 of the Indenture. The Notes and any Additional Notes are treated as a single class of securities under the Indenture. The Indenture imposes certain limitations on the ability of the Company and its Subsidiaries to create liens, enter into sale and leaseback transactions and enter into mergers and consolidations.

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5. Redemption

The Notes shall be redeemable, in whole or in part, at any time prior to March 15, 2030 (three months prior to the stated maturity date of the Notes), at the option of the Company, at a redemption price equal to the greater of (1) 100% of the aggregate principal amount of such Notes to be redeemed and (2) as determined by the Quotation Agent, the sum of the present values of the Remaining Scheduled Payments, plus, in each case, accrued and unpaid interest thereon to, but not including, the Redemption Date; provided that if the Company redeems any Notes on or after March 15, 2030 (three months prior to the stated maturity date of the Notes), the redemption price for those Notes will equal 100% of the principal amount of the Notes to be redeemed, plus accrued and unpaid interest thereon to, but not including, the Redemption Date.

In determining the present values of the Remaining Scheduled Payments, the Quotation Agent will discount such payments to the redemption date on a semiannual basis (assuming a 360-day year consisting of twelve 30-day months) using a discount rate equal to the Treasury Rate plus 25 basis points.

“Comparable Treasury Issue” means the United States Treasury security selected by the Quotation Agent as having an actual or interpolated maturity comparable to the remaining term of the Notes to be redeemed that would be utilized, at the time of selection and in accordance with customary financial practice, in pricing new issues of corporate debt securities of comparable maturity to the remaining term of such Notes.

“Comparable Treasury Price” means, with respect to any Redemption Date, (1) the arithmetic average of the Reference Treasury Dealer Quotations for such Redemption Date after excluding the highest and lowest Reference Treasury Dealer Quotations, or (2) if the Quotation Agent obtains fewer than four Reference Treasury Dealer Quotations, the arithmetic average of all Reference Treasury Dealer Quotations for such Redemption Date.

“Quotation Agent” means the Reference Treasury Dealer appointed by the Company.

“Reference Treasury Dealer” means (1) a Primary Treasury Dealer (as defined below) selected by KeyBanc Capital Markets Inc., MUFG Securities Americas Inc., TD Securities (USA) LLC and U.S. Bancorp Investments, Inc. and their respective successors, unless such entity ceases to be a primary U.S. Government securities dealer in the United States of America (a “Primary Treasury Dealer”), in which case the Company shall substitute another Primary Treasury Dealer; and (2) any other Primary Treasury Dealer selected by the Company.

“Reference Treasury Dealer Quotations” means, with respect to each Reference Treasury Dealer and any Redemption Date, the arithmetic average, as determined by the Quotation Agent, of the bid and asked prices for the Comparable Treasury Issue (expressed in each case as a percentage of its principal amount) quoted in writing to the Company by such Reference Treasury Dealer as of 3:30 p.m., New York City time, on the third Business Day preceding such Redemption Date.

“Remaining Scheduled Payments” means, with respect to any Note to be redeemed, the remaining scheduled payments of the principal of and premium, if any, and interest on such Note that would be due after the related Redemption Date but for such redemption; provided, however, that, if such Redemption Date is not an Interest Payment Date with respect to such Note, the amount of the next scheduled interest payment thereon will be reduced by the amount of interest accrued thereon to such Redemption Date.

“Treasury Rate” means, with respect to any Redemption Date, the rate per annum, as determined by the Company, equal to the semiannual equivalent yield to maturity (computed as of the third Business Day immediately preceding such Redemption Date) of the Comparable Treasury Issue, assuming a price for the Comparable Treasury Issue (expressed as a percentage of its principal amount) equal to the Comparable Treasury Price for such Redemption Date.

Except as set forth above and in Article 5 of the Notes, the Notes shall not be redeemable by the Company prior to maturity.

The Notes shall not be entitled to the benefit of any sinking fund.

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6. Notice of Redemption

At least 30 days but not more than 60 days before a date for redemption of Notes, the Company shall mail (or, at the Company’s option in the case of Notes held in book-entry form, send by electronic transmission) a notice of redemption by first-class mail to each Holder of Notes to be redeemed at its registered address. Notes in denominations of principal amount larger than $2,000 may be redeemed in part but only in integral multiples of $1,000 in excess thereof. If money sufficient to pay the redemption price of and accrued and unpaid interest on all Notes (or portions thereof) to be redeemed on the Redemption Date is deposited with the Paying Agent on or before 11:00 a.m. (New York City time) on the Redemption Date (or, if the Company or any of its Subsidiaries is the Paying Agent, such money is segregated and held in trust) and certain other conditions are satisfied, on and after such date interest shall cease to accrue on such Notes (or such portions thereof) called for redemption.

7. Denominations; Transfer; Exchange

The Notes are in fully registered form without coupons in denominations of principal amount of $2,000 and integral multiples of $1,000 in excess thereof. A Holder may register, transfer or exchange Notes in accordance with the Indenture. The Registrar may require a Holder, among other things, to furnish appropriate endorsements or transfer documents and to pay any taxes and fees required by law or permitted by the Indenture. The Registrar need not register the transfer of or exchange any Notes selected for redemption (except, in the case of a Note to be redeemed in part, the portion of the Note not to be redeemed) for a period beginning 15 days before the mailing of a notice of redemption of Notes to be redeemed and ending on the date of such mailing.

8. Persons Deemed Owners

The registered holder of this Note shall be treated as the owner of it for all purposes.

9. Unclaimed Money

If money for the payment of principal or interest remains unclaimed for two years after the date of payment of principal and interest, the Trustee or Paying Agent shall pay the money back to the Company at its request. After any such payment, Holders entitled to the money must look only to the Company and not to the Trustee for payment.

10. Defeasance

Subject to certain conditions set forth in the Indenture, the Company or any guarantor, as applicable, at any time may terminate some or all of its obligations under the Notes and the Indenture as it relates to the Notes if the Company or any guarantor, as applicable, deposits with the Trustee money or U.S. Government Obligations for the payment of principal of and interest on the Notes to redemption or maturity, as the case may be.

11. Amendment, Waiver

Subject to certain exceptions set forth in the Indenture, (i) the Indenture or the Notes may be amended with the written consent of the Holders of at least a majority in principal amount of the outstanding Notes and (ii) any default or noncompliance with any provision of the Indenture or the Notes may be waived with the written consent of the Holders of a majority in principal amount of the outstanding Notes (including consents obtained in connection with a tender offer or exchange for Notes). However, the Indenture requires the consent of each Noteholder that would be affected for certain specified amendments or modifications of the Indenture and the Notes. Subject to certain exceptions set forth in the Indenture, without the consent of any Noteholder, the Company and the Trustee may amend the Indenture or the Notes, among other things, to cure any ambiguity, omission, defect or inconsistency, or to evidence the succession of another Person to the Company (or any guarantor) and the assumption by any such Person of the obligations of the Company (or any guarantor) in accordance with Article 5 of the Indenture, or to add any additional Events of Default, or to add to the covenants of the Company for the benefit of the Holders of the Notes or surrender rights and powers conferred on the Company, or to add one or more guarantees for the benefit of the Holders of the Notes or to release one or more guarantees in accordance with the Indenture, or to add collateral security with respect to the Notes, or to add or appoint a successor or separate trustee or other agent, or to provide for the issuance of Additional Notes, or to comply with any requirements in connection with qualifying the Indenture under the Trust Indenture Act, or to provide for uncertificated Notes in addition to or in place of certificated Notes, or to comply with the rules of any applicable securities depository or to conform the provisions of the Indenture to the “Description of Notes,” “Description of the Notes and Guarantees” or “Description of Debt

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Securities” sections of any offering memorandum or prospectus prepared in connection with the issuance of the Notes (with the basis for any such amendment to be set forth in an Officers’ Certificate), or to change any other provision if the change does not adversely affect the interests of any Noteholder.

12. Defaults and Remedies

Under the Indenture, Events of Default include (a) a Default in any payment of interest on any Note when the same becomes due and payable occurs, and such default continues for a period of 30 days; (b) a Default in the payment of the principal of or premium, if any, on any Note when the same becomes due and payable at its Stated Maturity occurs, upon optional redemption or otherwise; (c) the Company or any guarantor fails to comply with any of its agreements in the Notes, the Indenture or any guarantee of the Notes, as applicable (other than those referred to in (a) or (b) above) and such failure continues for 60 days after the notice specified below; (d) a default under any bond, debenture, note or other evidence of indebtedness for money borrowed by the Company in an individual principal amount outstanding of at least $50,000,000 or under any mortgage, indenture or instrument under which there may be issued or by which there may be secured or evidenced any indebtedness for money borrowed by the Company in an individual principal amount outstanding of at least $50,000,000, whether such indebtedness now exists or shall hereafter be created, which default shall constitute a failure to pay $50,000,000 or more of the principal of such indebtedness when due and payable after the expiration of any applicable grace period with respect thereto or which default shall have resulted in such indebtedness becoming or being declared due and payable prior to the date on which it would otherwise have become due and payable, without such payment being made in full or such acceleration having been rescinded or annulled, within a period of 30 days after the notice specified below; (e) any guarantee with respect to the Notes ceases for any reason to be, or is asserted by the Company or the guarantor not to be, in full force and effect and enforceable in accordance with its terms except to the extent contemplated by this Indenture and any such guarantee of the Notes; and (f) certain events of bankruptcy or insolvency involving the Company or any guarantor.

A Default with respect to Notes under clause (c) and (d) above is not an Event of Default until the Trustee (by written notice to the Company) or the Holders of at least 25% in aggregate principal amount of the outstanding Notes (by written notice to the Company and the Trustee) gives notice of the Default and the Company does not cure such Default within the time specified in said clause (c) or (d), as applicable, after receipt of such notice. Such notice must specify the Default, demand that it be remedied and state that such notice is a “Notice of Default.”

If an Event of Default occurs and is continuing, the Trustee or the Holders of at least 25% in aggregate principal amount of the Notes may declare all the Notes to be due and payable immediately. Certain events of bankruptcy or insolvency involving the Company are Events of Default which will result in the Notes being due and payable immediately upon the occurrence of such Events of Default.

Noteholders may not enforce the Indenture or the Notes except as provided in the Indenture. The Trustee may refuse to enforce the Indenture or the Notes unless it receives indemnity and/or security reasonably satisfactory to it. Subject to certain limitations, Holders of a majority in principal amount of the Notes may direct the Trustee in its exercise of any trust or power. The Trustee may withhold from Noteholders notice of any continuing Default or Event of Default (except a Default or Event of Default in payment of principal or interest) if it in good faith determines that withholding notice is not opposed to their interest.

13. Trustee Dealings with the Company

Subject to certain limitations set forth in the Indenture, the Trustee under the Indenture, in its individual or any other capacity, may become the owner or pledgee of Notes and may otherwise deal with and collect obligations owed to it by the Company and may otherwise deal with the Company with the same rights it would have if it were not Trustee.

14. No Recourse Against Others

A director, officer, employee or shareholder (other than the Company), as such, of the Company shall not have any liability for any obligations of the Company under the Notes or the Indenture or for any claim based on, in respect of or by reason of such obligations or their creation. By accepting a Note, each Noteholder waives and releases all such liability. The waiver and release are part of the consideration for the issue of the Notes.

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15. Authentication

This Note shall not be valid until an authorized signatory of the Trustee (or an authenticating agent acting on its behalf) manually signs the certificate of authentication on the other side of this Note.

16. Abbreviations

Customary abbreviations may be used in the name of a Noteholder or an assignee, such as TEN COM (tenants in common), TEN ENT (tenants by the entirety), JT TEN (joint tenants with rights of survivorship and not as tenants in common), CUST (custodian) and U/G/M/A (Uniform Gift to Minors Act).

17. CUSIP and ISIN Numbers

The Company has caused CUSIP and ISIN numbers and/or other similar numbers to be printed on the Notes and has directed the Trustee to use CUSIP and ISIN numbers and/or other similar numbers in notices of redemption as a convenience to Noteholders. No representation is made as to the accuracy of such numbers either as printed on the Notes or as contained in any notice of redemption and reliance may be placed only on the other identification numbers placed thereon.

18. Governing Law

This Note shall be governed by, and construed in accordance with, the laws of the State of New York.

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ASSIGNMENT FORM

To assign this Note, fill in the form below:

I or we assign and transfer this Note to

(Print or type assignee’s name, address and zip code)

(Insert assignee’s Social Security or Tax I.D. No.)

and irrevocably appoint as agent to transfer this Note on the books of the Company. The agent may substitute another to act for him.

(Signature must be guaranteed by a participant in a recognized Signature

Guarantee Medallion Program or other signature guarantor program reasonably

acceptable to the Trustee)

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[TO BE ATTACHED IF A GLOBAL NOTE]

SCHEDULE OF INCREASES AND DECREASES IN GLOBAL NOTE

The following increases and decreases in this Global Note have been made:

A-10

Exhibit 5.1

		425 MARKET STREET SAN FRANCISCO CALIFORNIA 94105-2482   TELEPHONE: 415.268.7000 FACSIMILE: 415.268.7522   WWW.MOFO.COM		MORRISON & FOERSTER LLP BEIJING, BERLIN, BOSTON, BRUSSELS, DENVER, HONG KONG, LONDON, LOS ANGELES, NEW YORK, NORTHERN VIRGINIA, PALO ALTO, SAN DIEGO, SAN FRANCISCO, SHANGHAI, SINGAPORE, TOKYO, WASHINGTON, D.C

June 4, 2020

Southwest Gas Corporation

5241 Spring Mountain Road

Post Office Box 98510

Las Vegas, Nevada

Ladies and Gentlemen:

We have acted as counsel to Southwest Gas Corporation, a California corporation (the “Company”), in connection with the issuance and sale by the Company of $450,000,000 aggregate principal amount of the Company’s 2.200% Senior Notes due 2030 (the “Notes”), all of which are to be sold by the Company pursuant to a prospectus supplement dated June 1, 2020 and the accompanying base prospectus dated December 13, 2017 (such documents, collectively, the “Prospectus”) that form part of the Company’s effective Registration Statement on Form S-3 (No. 333-222047-01) (the “Registration Statement”), filed by the Company with the United States Securities and Exchange Commission (the “Commission”) under the Securities Act of 1933, as amended (the “Securities Act”). The Notes are to be sold by the Company pursuant to the terms of the Underwriting Agreement, dated June 1, 2020 (the “Underwriting Agreement”), by and among KeyBanc Capital Markets Inc., MUFG Securities Americas Inc., TD Securities (USA) LLC and U.S. Bancorp Investments, Inc., as Representatives of the underwriters named in Schedule 1 thereto, and in the matter described in the Prospectus.

In connection with this opinion, we have also examined originals or copies, certified or otherwise identified to our satisfaction, of: (i) the Articles of Incorporation with Statement of Conversion of the Company, as amended through the date hereof; (ii) the Bylaws of the Company, as amended through the date hereof; (iii) certain resolutions of the Board of Directors of the Company relating to the issuance, sale and registration of the Notes; and (iv) the Indenture (as defined below) and the Notes. In addition, we have examined originals or copies, certified or otherwise identified to our satisfaction, of certain other corporate records, documents, instruments and certificates of public officials and of the Company, and we have made such inquiries of officers of the Company and public officials and considered such questions of law as we have deemed necessary for purposes of rendering the opinions set forth herein.

In connection with this opinion, we have assumed (i) the Notes have been issued pursuant to an Indenture by and between the Company and The Bank of New York Mellon Trust Company, N.A. (the “Trustee”), dated as of June 4, 2020 (the “Base Indenture”) and a Supplemental Indenture by and between the Company and the Trustee, dated as of June 4, 2020 (the “Supplemental Indenture” and, together with the Base Indenture, the “Indenture”), and (ii) the Notes have been delivered against payment of valid consideration therefor and in accordance with the terms the Underwriting Agreement. In addition, we have assumed the genuineness of all signatures and the authenticity of all items submitted to us as originals and the conformity with originals of all items submitted to us as copies. In making our examination of documents executed by parties other than the Company, we have assumed that each other party has the power and authority to execute and deliver, and to perform and observe the provisions of, such documents and has duly authorized, executed and delivered such documents, and that such documents constitute the legal, valid and binding obligations of each such party. With respect to certain factual matters, we have relied upon certificates of officers of the Company.

The opinions hereinafter expressed are subject to the following further qualifications and exceptions, as to which we express no opinion:

Southwest Gas Corporation

Page 2 of 2

June 4, 2020

Based upon and subject to the foregoing, we are of the opinion that when the Notes have been duly executed, authenticated, issued and delivered in accordance with the provisions of the Indenture against payment of the consideration provided for in, and pursuant to the terms of, the Underwriting Agreement, such Notes constitute binding obligations of the Company, enforceable against the Company in accordance with their terms.

We express no opinion as to matters governed by any laws other than the substantive laws of the State of California and the State of New York in effect on the date hereof (without reference to choice-of-law rules). We express no opinion as to the New York choice of law provision contained in the Notes and the Indenture.

This opinion is furnished to you in connection with the filing by the Company of a Current Report on Form 8-K relating to the issuance and sale of the Notes, which Form 8-K will be incorporated by reference into the Registration Statement and Prospectus, and may not be relied upon for any other purpose without our express written consent. No opinion may be implied or inferred beyond the opinion expressly stated. This opinion is given as of the date hereof, and we assume no obligation to advise you of any changes in applicable law or any facts or circumstances that come to our attention after the date hereof that may affect the opinion contained herein.

We hereby consent to the filing of this opinion as an exhibit to the above-described Current Report on Form 8-K and to the reference to our firm contained under the heading “Legal Matters” in the Prospectus. In giving this consent, we do not admit that we are in the category of persons whose consent is required by Section 7 of the Securities Act or the rules and regulations promulgated by the Commission.