Document:

Form of Trust Debt Indenture

 EXHIBIT 4.14 
  
 [FORM OF TRUST DEBT INDENTURE] 
  
 SOUTHWEST GAS CORPORATION 
  
 and 
  
 BNY MIDWEST TRUST COMPANY, as Trustee 
  
 INDENTURE 
  
 Dated as of
            , 2003 
  
 Providing for the Issuance of 
 Deferrable Interest Subordinated Debentures in Series 
  
 including 
  
              % Deferrable Interest Junior Subordinated
Debentures, Series II 

 Southwest Gas Corporation Indenture 
 Certain Sections of this Indenture relating to 
 Sections 310 through 318 of the

 Trust Indenture Act of 1939 
  

	 Trust Indenture Act Section

	  	Indenture Section

	  ss.310(a)(1)
	  	7.10
	   (a)(2)
	  	7.10
	   (a)(3)
	  	Not Applicable
	   (a)(4)
	  	Not Applicable
	   (a)(5)
	  	Not Applicable
	   (b)
	  	7.08; 7.10; 11.01
	   (c)
	  	Not Applicable
	  ss.311(a)
	  	7.11
	   (b)
	  	7.11
	   (c)
	  	Not Applicable
	  ss.312(a)
	  	2.07
	   (b)
	  	11.03
	   (c)
	  	11.03
	  ss.313(a)
	  	7.06
	   (b)(1)
	  	Not Applicable
	   (b)(2)
	  	7.06
	   (c)
	  	7.06; 11.02
	   (d)
	  	7.06
	  ss.314(a)
	  	4.03; 11.02
	   (b)
	  	Not Applicable
	   (c)(1)
	  	2.02; 11.04; 11.05
	   (c)(2)
	  	2.02; 11.04; 11.05
	   (c)(3)
	  	Not Applicable
	   (d)
	  	Not Applicable
	   (e)
	  	11.05
	   (f)
	  	Not Applicable
	  ss.315(a)
	  	7.01(b)
	   (b)
	  	7.05,11.02
	   (c)
	  	7.01(a)
	   (d)
	  	7.01(c)
	   (e)
	  	6.11
	  ss.316(a)(1)(A)
	  	6.05
	   (a)(1)(B)
	  	6.04
	   (a)(2)
	  	Not Applicable
	   (a)(last sentence)
	  	2.10
	   (b)
	  	6.07
	   (c)
	  	1.05
	  ss.317(a)(1)
	  	6.08
	   (a)(2)
	  	6.09
	   (b)
	  	2.06

  

 i 

	  ss.318(a)
	  	11.01
	   (b)
	  	Not Applicable
	   (c)
	  	11.01

	Note:	 	This reconciliation and tie sheet shall not, for any purpose, be deemed to be a part of the Indenture. 

  

 ii 

 TABLE OF CONTENTS 
  

	ARTICLE I
	DEFINITIONS AND INCORPORATION BY REFERENCE
	 	  	 	  	Page

			
	 1.01
	  	Definitions	  	1
			
	 1.02
	  	Other Definitions	  	6
			
	 1.03
	  	Incorporation by Reference of Trust Indenture Act	  	6
			
	 1.04
	  	Rules of Construction	  	6
			
	 1.05
	  	Acts of Holders and Holders of Preferred Trust Securities	  	7
	
	ARTICLE II
	TRUST DEBT SECURITIES; SERIES II TRUST DEBT SECURITIES
			
	 2.01
	  	Issue of Trust Debt Securities Generally	  	8
			
	 2.02
	  	Terms and Form of the Series II Trust Debt Securities	  	9
			
	 2.03
	  	Payment of Principal and Interest	  	10
			
	 2.04
	  	Execution, Authentication and Delivery	  	12
			
	 2.05
	  	Registrar and Paying Agent	  	13
			
	 2.06
	  	Paying Agent to Hold Money in Trust	  	14
			
	 2.07
	  	Holder Lists	  	15
			
	 2.08
	  	Transfer and Exchange	  	15
			
	 2.09
	  	Replacement Trust Debt Securities	  	15
			
	 2.10
	  	Outstanding Trust Debt Securities; Determinations of Holders’ Action	  	16
			
	 2.11
	  	Temporary Trust Debt Securities	  	17
			
	 2.12
	  	Book-Entry System	  	17
			
	 2.13
	  	Cancellation	  	18
	
	ARTICLE III
	REDEMPTION
			
	 3.01
	  	Redemption: Notice to Trustee	  	19
			
	 3.02
	  	Selection of Trust Debt Securities to be Redeemed	  	19
			
	 3.03
	  	Notice of Redemption	  	19
			
	 3.04
	  	Effect of Notice of Redemption	  	20
			
	 3.05
	  	Deposit of Redemption Price	  	20
			
	 3.06
	  	Trust Debt Securities Redeemed in Part	  	21

  

 iv 

	 TABLE OF CONTENTS
 (continued)
  

	ARTICLE IV
	COVENANTS
	 	  	 	  	Page

			
	 4.01
	  	Payment of Trust Debt Securities	  	21
			
	 4.02
	  	Prohibition Against Dividends, etc.	  	22
			
	 4.03
	  	SEC Reports	  	22
			
	 4.04
	  	Compliance Certificates	  	22
			
	 4.05
	  	Further Instruments and Acts	  	23
			
	 4.06
	  	Payments for Consents	  	23
			
	 4.07
	  	Payment of Expenses of Trusts	  	23
	
	ARTICLE V
	SUCCESSOR CORPORATION
			
	 5.01
	  	When the Company May Merge, Etc.	  	23
	
	ARTICLE VI
	DEFAULTS AND REMEDIES
			
	 6.01
	  	Events of Default	  	24
			
	 6.02
	  	Acceleration	  	25
			
	 6.03
	  	Other Remedies	  	26
			
	 6.04
	  	Waiver of Past Defaults	  	26
			
	 6.05
	  	Control by Majority	  	26
			
	 6.06
	  	Limitation on Suits	  	27
			
	 6.07
	  	Rights of Holders to Receive Payment	  	27
			
	 6.08
	  	Collection Suit by the Trustee	  	28
			
	 6.09
	  	The Trustee May File Proofs of Claim	  	28
			
	 6.10
	  	Priorities	  	28
			
	 6.11
	  	Undertaking for Costs	  	29
			
	 6.12
	  	Waiver of Stay; Extension or Usury Laws	  	29
	
	ARTICLE VII
	THE TRUSTEE
			
	 7.01
	  	Duties of the Trustee	  	29
			
	 7.02
	  	Rights of the Trustee	  	30
			
	 7.03
	  	Individual Rights of the Trustee	  	32

  

 v 

 TABLE OF CONTENTS 
 (continued) 
  

	 	  	 	  	Page

			
	 7.04
	  	The Trustee’s Disclaimer	  	32
			
	 7.05
	  	Notice of Defaults	  	32
			
	 7.06
	  	Reports by Trustee to Holders	  	32
			
	 7.07
	  	Compensation and Indemnity	  	32
			
	 7.08
	  	Replacement of Trustee	  	33
			
	 7.09
	  	Successor Trustee by Merger	  	34
			
	 7.10
	  	Eligibility: Disqualification	  	34
			
	 7.11
	  	Preferential Collection of Claims Against the Company	  	34
	
	ARTICLE VIII
	 SATISFACTION AND DISCHARGE OF INDENTURE; DEFEASANCE OF
 CERTAIN OBLIGATIONS; UNCLAIMED MONEYS

			
	 8.01
	  	Satisfaction and Discharge of Indenture	  	35
			
	 8.02
	  	Application by Trustee of Funds Deposited for Payment of Trust Debt Securities	  	36
			
	 8.03
	  	Repayment of Moneys Held by Paying Agent	  	36
			
	 8.04
	  	Return of Moneys Held by the Trustee and Paying Agent Unclaimed for Three Years	  	36
	
	ARTICLE IX
	AMENDMENTS
			
	 9.01
	  	Without Consent of Holders	  	37
			
	 9.02
	  	With Consent of Holders	  	37
			
	 9.03
	  	Compliance with Trust Indenture Act	  	38
			
	 9.04
	  	Revocation and Effect of Consents; Waivers and Actions	  	38
			
	 9.05
	  	Notation on or Exchange of Trust Debt Securities	  	39
			
	 9.06
	  	Trustee to Execute Supplemental Indentures	  	39
			
	 9.07
	  	Effect of Supplemental Indentures	  	39
	
	ARTICLE X
	SUBORDINATION
			
	 10.01
	  	Applicability of Article; Trust Debt Securities Subordinated to Senior Indebtedness	  	40
			
	 10.02
	  	Priority and Payment of Proceeds in Certain Events; Remedies Standstill	  	40
			
	 10.03
	  	Payments which May Be Made Prior to Notice	  	41
			
	 10.04
	  	Rights of Holders of Senior Indebtedness Not to Be Impaired	  	41

  

 vi 

 TABLE OF CONTENTS 
 (continued) 
  
  

			
	 	  	 	  	Page

			
	 10.05
	  	Trustee May Take Action to Effectuate Subordination	  	42
			
	 10.06
	  	Subrogation	  	42
			
	 10.07
	  	Obligations of Company Unconditional; Reinstatement	  	42
			
	 10.08
	  	Trustee Entitled to Assume Payments Not Prohibited in Absence of Notice	  	43
			
	 10.09
	  	Right of Trustee to Hold Senior Indebtedness	  	43
			
	 10.10
	  	Trustee Not Fiduciary for Holders of Senior Indebtedness	  	44
	
	ARTICLE XI
	MISCELLANEOUS
			
	 11.01
	  	Trust Indenture Act Controls	  	44
			
	 11.02
	  	Notices	  	44
			
	 11.03
	  	Communication by Holders with Other Holders	  	45
			
	 11.04
	  	Certificate and Opinion as to Conditions Precedent	  	45
			
	 11.05
	  	Statements Required in Certificate or Opinion	  	45
			
	 11.06
	  	Severability Clause	  	46
			
	 11.07
	  	Rules by Trustee, Paying Agent and Registrar	  	46
			
	 11.08
	  	Legal Holidays	  	46
			
	 11.09
	  	Governing Law	  	46
			
	 11.10
	  	No Recourse Against Others	  	46
			
	 11.11
	  	Successors	  	47
			
	 11.12
	  	Multiple Original Copies of this Indenture	  	47
			
	 11.13
	  	No Adverse Interpretation of Other Agreements	  	47
			
	 11.14
	  	Table of Contents; Headings, Etc.	  	47
			
	 11.15
	  	Benefits of the Indenture	  	47
		
	 EXHIBIT A SOUTHWEST GAS CORPORATION
	  	 
	 	  	% Deferrable Interest Junior Subordinated Debenture, Series II	  	A-1

  
  
  
  

 vii 

 INDENTURE, dated as of             ,
2003, by and between Southwest Gas Corporation, a corporation duly organized and existing under the laws of the State of California (the “Company”), and BNY Midwest Trust Company, a trust company duly organized and existing under the laws
of the State of Illinois, as trustee (the “Trustee”). 
  
 WHEREAS, the Company may from time to time create or establish one or more statutory trusts for the purpose of issuing undivided beneficial interests in the assets thereof (the “Trust Securities”) and using the proceeds thereof to
acquire the Company’s Deferrable Interest Junior Subordinated Debentures. 
  
 WHEREAS, pursuant to an Amended and Restated Trust Agreement dated as of             , 2003 (the “Trust II Agreement”) among the Company, as
depositor, BNY Midwest Trust Company, as Property Trustee (the “Property Trustee II”) and the Delaware Trustee named therein, there has been declared and established Southwest Gas Capital II, a Delaware statutory trust (“Trust
II”). 
  
 WHEREAS, Trust II intends to issue its Trust
Securities, including its             % Mandatory Redeemable Preferred Trust Securities, representing undivided beneficial interests in the assets of Trust II, having a liquidation
amount of $             per security and having terms provided therefor in the Trust II Agreement (the “Trust II Preferred Securities”). 
  
 WHEREAS, the Company has authorized the issuance of its
             % Deferrable Interest Junior Subordinated Debentures, Series II (the “Series II Trust Debt Securities”) to be purchased by Trust II with the proceeds from the
issuance and sale of its Trust Securities, and to provide therefor, the Company has duly authorized the execution and delivery of this Indenture. 
  
 WHEREAS, all things necessary to make the securities issued hereunder, when duly issued and executed by the Company and authenticated and delivered
hereunder, the valid obligations of the Company, and to make this Indenture a valid and binding agreement of the Company, enforceable in accordance with its terms, have been done. 
  
 NOW THEREFORE, each of the Company and the Trustee, intending to be legally bound hereby, agrees as follows for the benefit
of the other party and for the equal and ratable benefit of the Holders (as hereinafter defined) of the securities issued hereunder, including the Series II Trust Debt Securities: 
  
 ARTICLE I 
 DEFINITIONS AND INCORPORATION BY REFERENCE 
  
 1.01    Definitions. 
  
 “Affiliate” of any specified Person means any other Person, directly or indirectly, controlling or controlled by or under direct or indirect common control with such specified Person. When used with respect to any Person,
“control” means the power to direct the management and policies of such Person, directly or indirectly, whether through the ownership 

  

 1 

 
of voting securities, by contract or otherwise; and the terms “controlling” and “controlled” have meanings correlative to the foregoing.

  
 “Bankruptcy Law” means Title 11 of the United States
Code, or any similar federal or state law for the relief of debtors. 
  
 “Board of Directors” means the Board of Directors of the Company or any committee thereof duly authorized to act on behalf of such Board. 
  
 “Board Resolution” means (i) a copy of a resolution certified by the Secretary or the Assistant Secretary of the Company to have been duly
adopted by the Board of Directors and to be in full force and effect on the date of such certification, or (ii) a certificate signed by the authorized officer or officers to whom the Board of Directors has delegated its authority, and in each case,
delivered to the Trustee. 
  
 “Business Day” means any
day that is not a Saturday, a Sunday or a day on which banking institutions in The City of New York, the City of Chicago or the State of California are authorized or required by law or executive order to close. 
  
 “Capital Stock” means any and all shares, interests, rights to
purchase, warrants, options, participation or other equivalents of or interests in (however designated) corporate stock, including limited liability company membership interests. 
  
 “Common Trust Securities” means the Common Trust Securities of a Trust, representing undivided beneficial
interests in the assets of such Trust. 
  
 “Company”
means Southwest Gas Corporation, a California corporation, or any permitted successor thereto. 
  
 “Company Order” means a written request or order signed in the name of the Company by an Officer of the Company and delivered to the Trustee. 
  
 “Custodian” means any receiver, trustee, assignee, liquidator, sequestrator, custodian or similar official under
any Bankruptcy Law. 
  
 “Default” means any event which
is, or after notice or passage of time, or both, would be, an Event of Default pursuant to Section 6.01 hereof. 
  
 “Exchange Act” means the Securities Exchange Act of 1934, as amended. 
  
 “Extension Period”, with respect to any series of Trust Debt Securities, means the period during which the Company
may elect to extend the interest payment period on such series of Trust Debt Securities pursuant to Section 4.01(b) hereof; provided that no Extension Period shall extend beyond the Stated Maturity Date or the Redemption Date of any Trust Debt
Security of such series. 
  

 2 

 “GAAP” means generally accepted accounting principles set forth in the opinions and
pronouncements of the Accounting Principles Board of the American Institute of Certified Public Accountants and statements and pronouncements of the Financial Accounting Standards Board. 
  
 “Holder” means a Person in whose name a Trust Debt Security is registered on the Registrar’s books.

  
 “Indenture” means this indenture, as amended or
supplemented from time to time in accordance with the terms hereof, including the provisions of the TIA that are deemed to be a part hereof. 
  
 “Interest Payment Date”, when used with respect to the Trust Debt Securities of any series, means the stated maturity of any installment of
interest on the Trust Debt Securities of that series. 
  
 “Issue Date”, with respect to a series of Trust Debt Securities, means the date on which the Trust Debt Securities of such series are originally issued. 
  
 “Legal Holiday” means any day other than a Business Day. 
  
 “Officer” means, with respect to any corporation, the Chairman of
the Board, the Chief Executive Officer, the President, any Vice President, the Treasurer, any Assistant Treasurer, the Secretary or any Assistant Secretary of such corporation. 
  
 “Officer’s Certificate” means a written certificate containing the applicable information specified in
Sections 11.04 and 11.05 hereof, signed in the name of the Company by any one of its Officers, and delivered to the Trustee. 
  
 “Opinion of Counsel” means a written opinion containing the applicable information specified in Sections 11.04 and 11.05 hereof, by legal
counsel who may be an employee of the Company. 
  
 “Paying
Agent” means any Person authorized by the Company to pay the principal of and premium, if any, and interest on the Trust Debt Securities of any series on behalf of the Company. 
  
 “Person” means any individual, corporation, partnership, limited liability company, joint venture, association,
joint-stock company, trust, unincorporated organization, government or any agency or political subdivision thereof or any other entity. 
  
 “Predecessor Trust Debt Securities” of any particular Trust Debt Security means every previous Trust Debt Security evidencing all or a portion
of the same debt as that evidenced by such particular Trust Debt Security; and for purposes of this definition, any Trust Debt Security authenticated and delivered under Section 2.09 hereof in exchange for or in lieu of a mutilated, destroyed, lost
or stolen Trust Debt Security shall be deemed to evidence the same debt as the mutilated, destroyed, lost or stolen Trust Debt Security. 
  

 3 

 “Preferred Trust Securities” means the Preferred Trust Securities of a Trust, representing
undivided beneficial interests in the assets of such Trust. 
  
 “Property Trustee II” means BNY Midwest Trust Company and its successors and assigns, as property trustee under the Trust II Agreement. 
  
 “Record Date”, with respect to any series of the Trust Debt Securities, means the Regular Record Date, the Special Record Date or any date set
to determine the Holders of Trust Debt Securities of such series entitled to vote, consent, make a request or exercise any other right associated with such Trust Debt Securities. 
  
 “Redemption Date”, with respect to the Trust Debt Securities of any series to be redeemed, means the date
specified for the redemption thereof in accordance with the terms thereof and pursuant to Article 3 of this Indenture. 
  
 “Redemption Price”, with respect to the Trust Debt Securities of any series to be redeemed, means the price at which such Trust Debt Security is
to be redeemed in accordance with the terms thereof and pursuant to Article 3 of this Indenture. 
  
 “Regular Record Date”, with respect to an interest payment on the Trust Debt Securities of any series, means the date set forth in this
Indenture or the supplemental indenture creating such series for the determination of Holders entitled to receive payment of interest on the next succeeding Interest Payment Date. 
  
 “Responsible Officer”, when used with respect to the Trustee, means any Vice President, any Assistant Vice
President, any Trust Officer, or Assistant Trust Officer or any other officer of the Corporate Trust Department of the Trustee customarily performing functions similar to those performed by any of the above designated officers and also means, with
respect to a particular corporate trust matter, any other officer to whom such matter is referred because of that officer’s knowledge of and familiarity with the particular subject and who shall have direct responsibility for the administration
of this Indenture. 
  
 “SEC” or “Commission”
means the Securities and Exchange Commission. 
  
 “Securities
Act” means the Securities Act of 1933, amended. 
  
 “Senior Indebtedness” means the principal of and premium, if any, and unpaid interest on (i) the Company’s indebtedness (including indebtedness of others guaranteed by the Company), whether outstanding on the date hereof or
hereafter created, incurred, assumed or guaranteed, for money borrowed, unless in the instrument creating or evidencing the same or pursuant to which the same is outstanding it is provided that such indebtedness is not senior or prior in right of
payment to the Trust Debt Securities, and (ii) renewals, extensions, modifications and refundings of any such indebtedness. 
  
 “Series II Trust Debt Securities “ means any of the Company’s
            % Deferrable Interest Junior Subordinated Debentures, Series II issued under this Indenture. 
  

 4 

 “Special Record Date” for the payment of any Defaulted Interest on the Trust Debt Securities of
any series means the date determined pursuant to Section 2.03 hereof. 
  
 “Stated Maturity Date”, with respect to any Trust Debt Security, means the date specified for such Trust Debt Security as the fixed date on which the principal of such Trust Debt Security is due and payable. 
  
 “Subsidiary” means any corporation, association, partnership, trust
or other business entity of which more than 50% of the total voting power of shares of Capital Stock or other interests (including partnership interests) entitled (without regard to the occurrence of any contingency) to vote in the election of
directors, managers or trustees thereof is at the time owned or controlled, directly or indirectly, by (i) the Company, (ii) the Company and one or more Subsidiaries, or (iii) one or more Subsidiaries. 
  
 “Successor” means the Person formed by or surviving such
consolidation or merger or to which such sale, conveyance, transfer or lease shall have been made 
  
 “TIA” means the Trust Indenture Act of 1939, as amended and as in effect on the date of this Indenture; provided, however, that if the TIA is
amended after such date, TIA means, to the extent required by any such amendment, the TIA as so amended. 
  
 “Trust” means any statutory trust created by the Company to issue Trust Securities and to use the proceeds from the sale thereof to purchase
Trust Debt Securities. 
  
 “Trust Debt Securities” means
any of the securities of any series issued, authenticated and delivered under this Indenture. 
  
 “Trust II” means Southwest Gas Capital II, a Delaware statutory trust created under the Delaware Statutory Trust Act, Chapter 38 of Title 12 of the Delaware Code, 12 Del. C. ss. 3801, et seq. 
  
 “Trust II Agreement” means the Amended and Restated Trust Agreement
dated as of                 , 2003, among the Company, as Depositor, BNY Midwest Trust Company, as Property Trustee and the Delaware Trustee named therein, as the
same may be amended and modified from time to time. 
  
 “Trust II Preferred Securities Guarantee Agreement” means the Guarantee Agreement dated as of             , 2003 from the Company, as guarantor, to BNY Midwest
Trust Company, as guarantee trustee, with respect to the Trust II Preferred Securities. 
  
 “Trust II Preferred Securities” means the undivided beneficial interests in the assets of Trust II, having a liquidation amount of $            
per security and having terms provided therefor in the Trust II Agreement. 
  
 “Trust Securities” means the undivided beneficial interests in the assets of a Trust and includes the Preferred Trust Securities and the Common Trust Securities of such Trust. 
  

 5 

 “Trustee” means BNY Midwest Trust Company, until a successor replaces it pursuant to the
applicable provisions of this Indenture and, thereafter, shall mean such successor. 
  
 “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 which are not callable at the issuer’s option. 
  

“Wholly Owned Subsidiary” means a Subsidiary all the Capital Stock of which (other than directors’ qualifying shares) is owned by the
Company or another Wholly Owned Subsidiary. 
  
 1.02    Other Definitions. 
  

	 TERM

	  	DEFINED IN SECTION

	 “Act”
	  	1.05
	 “Defaulted Interest”
	  	2.03
	 “Depositary”
	  	2.12
	 “global Trust Debt Security”
	  	2.12
	 “Notice of Default”
	  	6.01
	 “Register”
	  	2.05
	 “Registrar”
	  	2.05

  
 1.03    Incorporation by Reference of Trust Indenture Act. 
  
 Whenever this Indenture refers to a provision of the TIA, such provision is incorporated by reference in and made a part of this Indenture. The following TIA terms used in this Indenture have the following meanings:

  
 “indenture securities” means the Trust Debt
Securities. 
  
 “indenture security holder” means a
Holder. 
  
 “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 Trust Debt Securities. 
  
 All other TIA terms used in this Indenture that are defined by the TIA, defined by the TIA reference to another statute or defined by the SEC rule have
the meanings assigned to them by such definitions. 
  
 1.04    Rules of Construction. 
  
 Unless the context otherwise requires: 
  

 6 

 (1)    Each capitalized term has the meaning assigned to it;

  
 (2)    an accounting term
not otherwise defined has the meaning assigned to it in accordance with GAAP; 
  
 (3)    “or” is not exclusive; 
  
 (4)    “including” means including, without limitation; 
  
 (5)    words in the singular include the
plural, and words in the plural include the singular; and 
  
 (6)    “herein,” “hereof” and other words of similar import refer to this Indenture as a whole and not to any particular Article, Section or other subdivision. 
  
 1.05    Acts of Holders and Holders of Preferred Trust
Securities. 
  
 (a)    Any request,
demand, authorization, direction, notice, consent, waiver or other action provided by this Indenture to be given or taken by Holders or by holders of Preferred Trust Securities may be embodied in and evidenced by one or more instruments of
substantially similar tenor signed by such Holders or holders of Preferred Trust Securities, as applicable, in person or by an agent duly appointed in writing and, except as herein otherwise expressly provided, such action shall become effective
when such instrument or instruments are delivered to the Trustee and, where it is hereby expressly required, to the Company. Such instrument or instruments (and the action embodied therein and evidenced thereby) are herein sometimes referred to as
the “Act” of Holders or holders of Preferred Trust Securities signing such instrument or instruments. Proof of execution of any such instrument or of a writing appointing any such agent shall be sufficient for any purpose of this Indenture
and conclusive in favor of the Trustee and the Company, if made in the manner provided in this Section. 
  
 (b)    The fact and date of the execution by any Person of any such instrument or writing may be proved in any manner which the
Trustee deems sufficient. 
  
 (c)    The
ownership of Trust Debt Securities shall be proved by the Register. 
  
 (d)    Any request, demand, authorization, direction, notice, consent, waiver or other Act of the Holder of any Trust Debt Security shall bind every future Holder of the same Trust Debt Security and the Holder of every
Trust Debt Security issued upon the registration transfer thereof or in exchange therefor or in lieu thereof in respect of anything done, omitted or suffered to be done by the Trustee or the Company in reliance thereon, whether or not notation of
such action is made upon such Trust Debt Security. 
  
 (e)    If the Company solicits from the Holders any request, demand, authorization, direction, notice, consent, waiver or other Act, the Company may, at its option, by or pursuant to a resolution of its Board of
Directors, fix in advance a Record Date for the determination of Holders entitled to give such request, demand, authorization, direction, notice, consent, waiver or other Act, but the Company shall have no obligation to do so. If such a Record Date
is fixed, such request, demand, authorization, direction, notice, consent, waiver or other Act may be given 

  

 7 

 
before or after such Record Date, but only Holders of record at the close of business on such Record Date shall be deemed to be Holders for the purposes of
determining whether Holders of the requisite proportion of outstanding Trust Debt Securities have authorized or agreed or consented to such request, demand, authorization, direction, notice, consent, waiver or other Act, and for that purpose the
outstanding Trust Debt Securities shall be computed as of such Record Date. 
  
 ARTICLE II 
 TRUST DEBT SECURITIES; SERIES II TRUST DEBT SECURITIES 
  
 2.01    Issue of Trust Debt Securities Generally.

  
 The aggregate principal amount of any series of Trust Debt
Securities which may be authenticated and delivered under this Indenture is limited to the aggregate liquidation amount of the Trust Securities of the Trust purchasing such Trust Debt Securities. 
  
 The Trust Debt Securities may be issued in one or more series as from time to
time shall be authorized by the Board of Directors. 
  
 The Trust
Debt Securities of each series and the Trustee’s Certificate of Authentication shall be substantially in the forms to be attached as exhibits to the Indenture or supplemental indenture creating such series, but in the case of any series of
Trust Debt Securities other than the Series II Trust Debt Securities, with such inclusions, omissions and variations as to letters, numbers or other marks of identification or designation and such legends or endorsements printed, lithographed or
engraved thereon as the Company may deem appropriate and as are not inconsistent with the provisions of this Indenture, or as may be required to comply with any law or with any rule or regulation made pursuant thereto or with any rule or regulation
of any securities exchange on which such Trust Debt Securities may be listed, or to conform to usage. 
  
 Other series of Trust Debt Securities may differ from the Series II Trust Debt Securities, and as and between series, in respect of any or all of the
following matters: 
  
 (a)    designation;

  
 (b)    Stated Maturity Date or Dates,
which may be serial and the Company’s option, if any, to change the Stated Maturity Date or Dates; 
  
 (c)    interest rate or method of determination of the interest rate; 
  
 (d)    the basis upon which interest shall be computed if other than a 360-day year composed of twelve
30-day months; 
  
 (e)    Interest Payment
Dates and the Regular Record Dates therefor; 
  
 (f)    the maximum duration of the Extension Period; 
  
 (g) Issue Date or Dates and interest accrual provisions; 
  

 8 

 (h)    authorized denominations; 
  
 (i)    the place or places for the payment of principal
(and premium, if any) and interest; 
  
 (j)    the aggregate principal amount of Trust Debt Securities of such series which may be issued; 
  
 (k)    the optional and mandatory redemption provisions, if any; 
  
 (l)    provisions, if any, for any sinking or analogous fund; 
  
 (m)    the applicability to such series of the provisions
of Article 10 hereof relating to subordination; and 
  
 (n)    any other provisions expressing or referring to the terms and conditions upon which the Trust Debt Securities of such series are to be issued under this Indenture which are not in conflict with the provisions of
this Indenture; 
  
 in each case as determined by the Board of Directors and
specified in the supplemental indenture creating such series. 
  
 2.02    Terms and Form of the Series II Trust Debt Securities. 
  
 (a)    The Series II Trust Debt Securities shall be designated “Southwest Gas Corporation,
             % Deferrable Interest Junior Subordinated Debentures, Series II.” The Series II Trust Debt Securities and the Trustee’s Certificate of Authentication shall be
substantially in the form of Exhibit A attached hereto. The Series II Trust Debt Securities shall initially be issued as global Trust Debt Securities in accordance with the provisions of Section 2.12 of this Indenture, with The Depository Trust
Company as Depositary. The terms and provisions contained in the Series II Trust Debt Securities shall constitute, and are hereby expressly made, a part of this Indenture. The Company and the Trustee, by their execution and delivery of this
Indenture, expressly agree to such terms and provisions and to be bound thereby. 
  
 (b)    The aggregate principal amount of Series II Trust Debt Securities outstanding at any time may not exceed $            
except as provided in Section 2.09 hereof. The Series II Trust Debt Securities shall be authenticated and delivered upon delivery to the Trustee of items specified in Section 2.04(d) hereof. 
  
 (c)    The Stated Maturity Date of the Series II Trust
Debt Securities is             . 
  
 (d)    The interest rate of the Series II Trust Debt Securities shall be as follows:
                                . The Interest Payment Dates for the Series II Trust
Debt Securities shall be                 ,                 ,
                 and                 of each year, commencing
                    , 2003. In the event that any date on which interest is payable on the Series II Trust Debt Securities is not a Business Day,
then payment of interest payable on such date will be made on the next day which is a Business Day (and without any interest or other 

  

 9 

 
payment in respect of any such delay), except that if such Business Day is in the next succeeding calendar year, such payment shall be made on the
immediately preceding Business Day, in each case with the same force and effect as if made on such date. The Regular Record Date for each Interest Payment Date for the Series II Trust Debt Securities shall be the      day
(whether or not a Business Day) preceding the applicable Interest Payment Date, provided that if Trust II is the sole Holder of the Series II Trust Debt Securities or the Series II Trust Debt Securities are issued in book-entry-only form, the
Regular Record Date shall be the close of business on the Business Day immediately preceding such Interest Payment Date. 
  
 Each Series II Trust Debt Security shall bear interest from its Issue Date or from the most recent Interest Payment Date to which interest has been paid
or duly provided for with respect to such Series II Trust Debt Security; except that, so long as there is no existing Defaulted Interest (as defined in Section 2.03 hereof) or Extension Period on the Series II Trust Debt Securities, any Series II
Trust Debt Security authenticated by the Trustee between the Regular Record Date for any Interest Payment Date and such Interest Payment Date shall bear interest from such Interest Payment Date. Each Series II Trust Debt Security shall be dated the
date of its authentication. 
  
 Overdue principal of and interest
on any Series II Trust Debt Security and interest which has been deferred pursuant to Section 4.01(b) hereof shall bear interest (to the extent that the payment of such interest shall be legally enforceable) at a rate per annum equal to the interest
rate per annum payable on such Series II Trust Debt Security. 
  
 (e)    The Series II Trust Debt Securities shall be issuable only in registered form without coupons and only in denominations of $             and any
integral multiple thereof. 
  
 (f)    The
maximum Extension Period for the Series II Trust Debt Securities shall be five years consisting of      consecutive periods. 
  
 2.03    Payment of Principal and Interest. 
  
 Unless otherwise specified pursuant to Section 2.01(d), interest on the Trust Debt Securities shall be computed on the basis
of a 360-day year composed of twelve 30-day months, and for any period shorter than thirty days, interest will be computed on the basis of the actual number of days elapsed in such period. 
  
 Unless otherwise provided with respect to a series of Trust Debt Securities,

  
 (i)    the principal and
Redemption Price of and interest on each Trust Debt Security shall be payable in such coin or currency of the United States of America as at the time of payment is legal tender for the payment of public and private debts; 
  
 (ii)    the principal and Redemption
Price of any Trust Debt Security and interest payable on the Stated Maturity Date (if other than an Interest Payment Date) or Redemption Date shall be payable in immediately available funds upon surrender of such Trust Debt Security at the office or
agency of any Paying Agent therefor; and 
  

 10 

 (iii)    interest on any Trust Debt Security shall be paid on each
Interest Payment Date therefor to the Holder thereof at the close of business on the Record Date therefor, such interest to be payable by check mailed to the address of the Person entitled thereto as such address appears on the Register; provided
however, that (1) at the written request of the Holder of at least $10,000,000 aggregate principal amount of Trust Debt Securities received by the Registrar not later than the Regular Record Date for such Interest Payment Date, interest accrued on
such Trust Debt Security will be payable by wire transfer within the continental United States in immediately available funds to the bank account number of such Holder specified in such request and entered on the Register by the Registrar and (2)
payments made in respect of global Trust Debt Securities shall be made in immediately available funds to the Depositary. 
  
 Except as specified pursuant to Section 2.01 or Section 4.01(b) hereof, interest on any Trust Debt Security which is payable, and is punctually paid or
duly provided for, on any Interest Payment Date shall be paid to the Person in whose name that Trust Debt Security (or one or more Predecessor Trust Debt Securities) is registered at the close of business on the Regular Record Date for such
interest. Any interest on any Trust Debt Security which is payable, but is not punctually paid or duly provided for, on any Interest Payment Date (herein called “Defaulted Interest”) shall forthwith cease to be payable to the Holder on the
relevant Regular Record Date by virtue of having been such Holder, and such Defaulted Interest may be paid by the Company, at its election in each case, as provided in Clause (1) and (2) below: 
  
 (1)    The Company may elect to make payment of any
Defaulted Interest to the Persons in whose names the Trust Debt Securities (or their respective Predecessor Trust Debt Securities) are registered at the close of business on a Special Record Date for the payment of such Defaulted Interest, which
shall be fixed in the following manner. The Company shall, not less than 15 Business Days prior to the date of the proposed payment, notify the Trustee and the Paying Agent in writing of the amount of Defaulted Interest proposed to be paid on each
Trust Debt Security and the date of the proposed payment, and at the same time the Company shall deposit with the Paying Agent 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 Paying Agent for such deposit prior to the date of the proposed payment, such money when deposited to be held in trust for the benefit of the Persons entitled to such Defaulted Interest as in this Clause provided.
The Special Record Date for the payment of such Defaulted Interest shall be the close of business on the tenth calendar day prior to the date of the proposed payment. The Trustee shall, in the name and at the expense of the Company, cause notice of
the proposed payment of such Defaulted Interest and the Special Record Date therefor to be given to the Holders thereof, not less than 7 calendar days prior to such Special Record Date. Notice of the proposed payment of such Defaulted Interest and
the Special Record Date therefor having been given, such Defaulted Interest shall be paid to the Persons in whose names the Trust Debt Securities (or their respective Predecessor Trust Debt Securities) are registered at the close of business on such
Special Record Date and shall no longer be payable pursuant to the following Clause (2). 
  
 (2)    The Company may make payment of any Defaulted Interest on the Trust Debt Securities in any other lawful manner not inconsistent with the requirements of any securities 

  

 11 

 
exchange on which such Trust Debt Securities may be listed, and upon such notice as may be required by such exchange, if, after notice given by the Company
to the Trustee and the Paying Agent of the proposed payment pursuant to this Clause, such manner of payment shall be deemed practicable by the Paying Agent. 
  
 Subject to the foregoing provisions of this Section, each Trust Debt Security delivered under this Indenture upon registration of transfer of or in
exchange for or in lieu of any other Trust Debt Security shall carry the rights to interest accrued and unpaid, and to accrue, which were carried by such other Trust Debt Security. 
  
 2.04    Execution, Authentication and Delivery. 
  
 (a)    The Trust Debt Securities shall be executed on
behalf of the Company by its Chairman, its President or one of its Vice Presidents, under its corporate seal imprinted or reproduced thereon and attested by its Secretary or one of its Assistant Secretaries. The signature of any such Officer on the
Trust Debt Securities may be manual or facsimile. 
  
 (b)    Trust Debt Securities bearing the manual or facsimile signatures of individuals who were at any time the proper Officers of the Company shall bind the Company, notwithstanding that such individuals or any of them
have ceased to hold such offices prior to the authentication and delivery of such Trust Debt Securities or did not hold such offices at the date of such Trust Debt Securities. 
  
 (c)    No Trust Debt Security shall be entitled to any benefit under this Indenture or be valid or
obligatory for any purpose unless there appears on such Trust Debt Security a Certificate of Authentication duly executed by the Trustee by manual signature of a Responsible Officer, and such Certificate of Authentication upon any Trust Debt
Security shall be conclusive evidence, and the only evidence, that such Trust Debt Security has been duly authenticated and made available for delivery hereunder. 
  
 (d)    The Trustee shall authenticate and deliver Trust Debt Securities of a series, for original issue,
at one time or from time to time in accordance with the Company Order referred to below, upon receipt by the Trustee of: 
  
 (1)    a Board Resolution approving the form or forms and terms of such Trust Debt Securities; 
  
 (2)    a Company Order requesting the
authentication and delivery of such Trust Debt Securities and stating the identity of the Trust and the aggregate liquidation amount of the Trust Securities to be issued concurrently with such Trust Debt Securities; 
  
 (3)    unless previously delivered, this
Indenture or a supplemental indenture hereto setting forth the form of such Trust Debt Securities and establishing the terms thereof; 
  
 (4)    the Trust Debt Securities of such series, executed on behalf of the Company in accordance with Section 2.04(a)
hereof; 
  

 12 

 (5)    an Opinion of Counsel to the effect that: 
  
 (i)    the form or forms of such Trust
Debt Securities have been duly authorized by the Company and have been established in conformity with the provisions of this Indenture; and 
  
 (ii)    such Trust Debt Securities, when authenticated and delivered by the Trustee and issued and delivered by the
Company in the manner and subject to any conditions specified in such Opinion of Counsel, will have been duly issued under this Indenture and will constitute valid and legally binding obligations of the Company, entitled to the benefits provided by
this Indenture, and enforceable in accordance with their terms, subject, as to enforcement to laws relating to or affecting generally the enforcement of creditors’ rights, including, without limitation, bankruptcy and insolvency laws and to
general principles of equity (regardless of whether such enforceability is considered in a proceeding in equity or at law); and 
  
 (iii)    that this Indenture or any supplemental indenture referred to in clause (3) above has been duly authorized,
executed and delivered by the Company and is a valid instrument legally binding upon the Company, enforceable in accordance with its terms, subject as to enforcement to laws relating to or affecting creditors’ rights, including, without
limitation, bankruptcy and insolvency laws and to general principles of equity (regardless of whether such enforceability is considered in a proceeding in equity or at law); and 
  
 (iv)    that all consents, approvals and orders of any commission, governmental
authority or agency required in connection with the issuance and delivery of such Trust Debt Securities have been obtained. 
  
 (e)    an Officer’s Certificate certifying that no Default or Event of Default has occurred and is continuing. 
  
 (f)    The Trustee shall act as the initial
authenticating agent. Thereafter, the Trustee may appoint an authenticating agent with the consent of the Company, which consent shall not be unreasonably withheld. An authenticating agent may authenticate Trust Debt Securities whenever the Trustee
may do so. Each reference in this Indenture to authentication by the Trustee includes authentication by such agent. The Company shall pay any authenticating agent appointed by the Trustee reasonable compensation for its services. The provisions set
forth in Section 7.02, Section 7.03, Section 7.04 and Section 7.07 hereof shall be applicable to any authenticating agent. 
  
 2.05    Registrar and Paying Agent. 
  
 The Company shall maintain or cause to be maintained, within or outside the State of Illinois, an office or agency where the Trust Debt Securities may be
presented for registration of transfer or for exchange (“Registrar”), a Paying Agent at whose office the Trust Debt Securities may be presented or surrendered for payment, and an office or agency where notices and demands to or upon the
Company in respect of the Trust Debt Securities and this Indenture may 
  

 13 

 
be served. The Registrar shall keep a register (the “Register”) of the Trust Debt Securities and of their transfer and exchange. The Company may
have one or more co-Registrars and one or more additional Paying Agents. The term Registrar includes any additional registrar and the term Paying Agent includes any additional paying agent. The corporate office of the Trustee in Chicago, Illinois
shall initially be the Registrar for each series of Trust Debt Securities and agent for service of notice or demands on the Company, and the Trustee shall initially be the Paying Agent for each series of Trust Debt Securities. 
  
 The Company shall enter into an appropriate agency agreement with any
Registrar, Paying Agent or co-Registrar (if not the Company or the Trustee or an affiliate of the Trustee). The agreement shall implement the provisions of this Indenture that relate to such agent. The Company shall give prompt written notice to the
Trustee and to the Holders of any change of location of such office or agency. If at any time the Company shall fail to maintain or cause to be maintained 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 11.02 hereof. The Company shall notify the Trustee of the name and address of any such agent. If the Company fails
to maintain a Registrar, Paying Agent or agent for service of notices or demands, the Trustee shall act as such and shall be entitled to appropriate compensation therefor pursuant to Section 7.07 hereof. The Company or any Affiliate of the Company
may act as Paying Agent, Registrar or co-Registrar or agent for service of notices and demands. 
  
 The Company may also from time to time designate one or more other offices or agencies where the Trust Debt Securities may be presented or surrendered for
any or all such purposes and may from time to time rescind such designations. The Company will give prompt written notice to the Trustee and to the Holders of any such designation or rescission and of any change in location of any such other office
or agency. 
  
 2.06    Paying Agent to Hold
Money in Trust. 
  
 Except as otherwise provided herein, prior
to 10:00 a.m. on each due date of the principal of and premium (if any) and interest on any Trust Debt Security, the Company shall deposit with the Paying Agent a sum of money sufficient to pay such principal, premium (if any) and interest so
becoming due. The Company shall require each Paying Agent (other than the Trustee or the Company) to agree in writing that such Paying Agent shall hold in trust for the benefit of Holders or the Trustee all money held by the Paying Agent for the
payment of principal of and premium (if any) and interest on the Trust Debt Securities and shall notify the Trustee of any Default by the Company in making any such payment. At any time during the continuance of any such Default, the Paying Agent
shall, upon the request of the Trustee, forthwith pay to the Trustee all money so held in trust and account for any money disbursed by it. The Company at any time may require a Paying Agent to pay all money held by it to the Trustee and to account
for any money disbursed by it. Upon doing so, the Paying Agent shall have no further liability for the money so paid over to the Trustee. If the Company, a Subsidiary or an Affiliate of either of them acts as Paying Agent, it shall segregate the
money held by it as Paying Agent and hold it as a separate trust fund. 
  

 14 

 2.07    Holder Lists. 
  
 The Trustee shall preserve in as current a form as is reasonably practicable
the most recent list available to it of the names and addresses of Holders. If the Trustee is not the Registrar, the Company shall cause to be furnished to the Trustee on or before the Record Date for each Interest Payment Date and at such other
times as the Trustee may request in writing, within five Business Days of such request, a list, in such form as the Trustee may reasonably require of the names and addresses of Holders. 
  
 2.08    Transfer and Exchange. 
  
 When Trust Debt Securities are presented to the Registrar or a co-Registrar with a request to register the transfer or to
exchange them for an equal principal amount of Trust Debt Securities of the same series of other authorized denominations, the Registrar shall register the transfer or make the exchange as requested if its reasonable requirements for such
transactions are met. To permit registrations of transfer and exchanges, the Company shall execute and the Trustee shall authenticate Trust Debt Securities, all at the Registrar’s request. 
  
 Every Trust Debt Security presented or surrendered for registration of
transfer or for exchange shall (if so required by the Company or the Registrar) be duly endorsed, or be accompanied by a written instrument of transfer in form satisfactory to the Registrar duly executed by the Holder or his attorney duly authorized
in writing. 
  
 The Company shall not require payment of a service
charge for any registration of transfer or exchange of Trust Debt Securities, but the Company may require payment of a sum sufficient to pay all taxes, assessments or other governmental charges that may be imposed in connection with the registration
of the transfer or exchange of Trust Debt Securities from the Holder requesting such transfer or exchange (other than any exchange of a temporary Trust Debt Security for a definitive Trust Debt Security not involving any change in ownership).

  
 The Company shall not be required to make, and the Registrar
need not register, transfers or exchanges of (a) any Trust Debt Security for a period beginning at the opening of business 15 days before the mailing of a notice of redemption of Trust Debt Securities and ending at the close of business on the day
of such mailing or (b) any Trust Debt Security selected, called or being called for redemption, except, in the case of any Trust Debt Security to be redeemed in part, the portion thereof not to be redeemed. 
  
 2.09    Replacement Trust Debt Securities.

  
 If (a) any mutilated Trust Debt Security is surrendered to
the Company or the Trustee, or (b) the Company and the Trustee receive evidence to their satisfaction of the destruction, loss or theft of any Trust Debt Security, and there is delivered to the Company and the Trustee such security or indemnity as
may be required by them to save each of them harmless, then, in the absence of notice to the Company or the Trustee that such Trust Debt Security has been acquired by a bona fide purchaser, the Company shall execute in exchange for any such
mutilated Trust Debt Security or in lieu of any such destroyed, lost or stolen Trust Debt Security, a new Trust Debt Security of the same series and of like tenor and principal amount, bearing a number not 

  

 15 

 
contemporaneously outstanding, and the Trustee shall authenticate and make such new Trust Debt Security available for delivery. 
  
 In case any such mutilated, destroyed, lost or stolen Trust Debt Security has
become or is about to become due and payable, or is about to be redeemed by the Company pursuant to Article 3 hereof, the Company in its discretion may, instead of issuing a new Trust Debt Security, pay or purchase such Trust Debt Security, as the
case may be. 
  
 Upon the issuance of any new Trust Debt
Securities under this Section 2.09, the Company may require the payment of a sum sufficient to cover any tax or other governmental charge that may be imposed in relation thereto and any other expenses (including the fees and expenses of the Trustee)
in connection therewith. 
  
 Every new Trust Debt Security issued
pursuant to this Section 2.09 in lieu of any mutilated, destroyed, lost or stolen Trust Debt Security shall constitute an original additional contractual obligation of the Company (whether or not the mutilated, destroyed, lost or stolen Trust Debt
Security shall be at any time enforceable) and shall be entitled to all benefits of this Indenture equally and ratably with any and all other Trust Debt Securities duly issued hereunder. 
  
 The provisions of this Section 2.09 are exclusive and shall preclude (to the extent lawful) all other rights and remedies
with respect to the replacement or payment of mutilated, destroyed, lost or stolen Trust Debt Securities. 
  
 2.10    Outstanding Trust Debt Securities; Determinations of Holders’ Action. 
  
 Trust Debt Securities outstanding at any time are all the Trust Debt
Securities authenticated by the Trustee except for those canceled by it, those delivered to it for cancellation, those mutilated, destroyed, lost or stolen Trust Debt Securities referred to in Section 2.09 hereof, those redeemed by the Company
pursuant to Article 3 hereof, and those described in this Section 2.10 as not outstanding. A Trust Debt Security does not cease to be outstanding because the Company or a Subsidiary or Affiliate thereof holds the Trust Debt Security; provided,
however, that in determining whether the Holders of the requisite principal amount of Trust Debt Securities have given or concurred in any request, demand, authorization, direction, notice, consent or waiver hereunder, Trust Debt Securities owned by
the Company or a Subsidiary or Affiliate (other than any Trust so long as any of the Preferred Trust Securities of such Trust are outstanding) shall be disregarded and deemed not to be outstanding. 
  
 Subject to the foregoing, only Trust Debt Securities outstanding at the time
of such determination shall be considered in any such determination (including determinations pursuant to Articles 3, 6 and 9). 
  
 If a Trust Debt Security is replaced pursuant to Section 2.09 hereof, it ceases to be outstanding unless the Trustee receives proof satisfactory to it
that the replaced Trust Debt Security is held by a bona fide purchaser. 
  
 If the Paying Agent (other than the Company) holds, in accordance with this Indenture, at the Stated Maturity Date or on a Redemption Date, money sufficient to pay the Trust Debt Securities payable on that date, then immediately on the
Stated Maturity Date or such 

  

 16 

 
Redemption Date, as the case may be, such Trust Debt Securities shall cease to be outstanding, and interest, if any, on such Trust Debt Securities shall
cease to accrue. 
  
 2.11    Temporary
Trust Debt Securities. 
  
 The Company may execute temporary
Trust Debt Securities, and upon the Company’s Order, the Trustee shall authenticate and make such temporary Trust Debt Securities available for delivery. Temporary Trust Debt Securities shall be printed, lithographed, typewritten, mimeographed
or otherwise produced, in any authorized denomination, in the same series and principal amount and of like tenor as the definitive Trust Debt Securities in lieu of which they are issued and with such appropriate insertions, omissions, substitutions
and other variations as the Officers of the Company executing such Trust Debt Securities may determine, as conclusively evidenced by their execution of such Trust Debt Securities. 
  
 After the preparation of definitive Trust Debt Securities, the temporary Trust Debt Securities shall be exchangeable for
definitive Trust Debt Securities of the same series upon surrender of the temporary Trust Debt Securities at the office or agency of the Company designated for such purpose pursuant to Section 2.05 hereof, without charge to the Holders thereof. Upon
surrender for cancellation of any one or more temporary Trust Debt Securities, the Company shall execute a like principal amount of definitive Trust Debt Securities of the same series of authorized denominations, and the Trustee, upon receipt of a
Company Order, shall authenticate and make such Trust Debt Securities available for delivery in exchange therefor. Until so exchanged, the temporary Trust Debt Securities shall in all respects be entitled to the same benefits under this Indenture as
definitive Trust Debt Securities. 
  
 2.12    Book-Entry System. 
  
 In order to utilize a book-entry-only system for all or any portion of the Trust Debt Securities of any series, all or a portion of the Trust Debt Securities of any series may be issued in the form of one or more fully registered Trust Debt
Securities of the same series for the aggregate principal amount of such Trust Debt Securities of each Issue Date, interest rate and Stated Maturity Date (a “global Trust Debt Security”), which global Trust Debt Security shall be
registered in the name of the depositary (the “Depositary”) selected by the Company or in the name of such Depositary’s nominee. Each global Trust Debt Security shall be delivered by the Trustee to the Depositary or pursuant to the
Depositary’s instruction. 
  
 Notwithstanding any other
provision of this Section 2.12 or of Section 2.08 hereof, a global Trust Debt Security may be transferred in whole but not in part and in the manner provided in Section 2.08 hereof, only by a nominee of the Depositary for such series, or by the
Depositary or any such nominee of a successor Depositary for such series selected or approved by the Company or to a nominee of such successor Depositary. 
  
 If (i) at any time the Depositary for global Trust Debt Securities of any series of Trust Debt Securities notifies the Company that it is unwilling or
unable to continue as Depositary for such global Trust Debt Securities or if at any time the Depositary for such global Trust Debt Securities shall no longer be registered or in good standing under the Exchange Act or other applicable statute or
regulation, and a successor Depositary for such global Trust Debt Securities 

  

 17 

 
is not appointed by the Company within 90 days after the Company receives such notice or becomes aware of such condition, as the case may be, (ii) the
Company determines in its sole discretion, that the Trust Debt Securities of any series shall no longer be represented by one or more global Trust Debt Securities and delivers to the Trustee an Officer’s Certificate evidencing such
determination or (iii) an Event of Default occurs and is continuing, then the provisions of this Section 2.12 shall no longer apply to the Trust Debt Securities of such series. In such event, the Company will execute and the Trustee, upon receipt of
an Officer’s Certificate evidencing such determination by the Company, will authenticate and deliver Trust Debt Securities of such series and of like tenor in definitive registered form, in authorized denominations, and in aggregate principal
amount equal to the principal amount of the global Trust Debt Securities of such series in exchange for such global Trust Debt Securities. Upon the exchange of global Trust Debt Securities for such Trust Debt Securities in definitive registered form
without coupons, in authorized denominations, the global Trust Debt Securities shall be cancelled by the Trustee. Such Trust Debt Securities in definitive registered form issued in exchange for global Trust Debt Securities pursuant to this Section
2.12 shall be registered in such names and in such authorized denominations as the Depositary, pursuant to instructions from its direct or indirect participants or otherwise, shall instruct the Trustee. The Trustee shall deliver such Trust Debt
Securities to the Persons in whose names such Trust Debt Securities are so registered. 
  
 Except as provided above, owners of beneficial interests in a global Trust Debt Security shall not be entitled to receive physical delivery of Trust Debt Securities in definitive form and will not be considered the
Holders thereof for any purpose under this Indenture. 
  
 Members
of or participants in the Depositary shall have no rights under this Indenture with respect to any global Trust Debt Security held on their behalf by the Depositary, and such Depositary or its nominee, as the case may be, may be treated by the
Company, the Trustee, and any agent of the Company or the Trustee as the Holder of such global Trust Debt Securities for all purposes whatsoever. Notwithstanding the foregoing, nothing herein shall 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 the Depositary or impair, as between the Depositary and its members or participants, the operation of customary practices governing
exercise of the rights of a Holder of any Trust Debt Security, including without limitation the granting of proxies or other authorization of participants to give or take any request, demand, authorization, direction, notice, consent, waiver or
other action which a Holder is entitled to give or take under this Indenture. 
  
 2.13    Cancellation. 
  
 All Trust Debt Securities surrendered for payment, redemption by the Company pursuant to Article 3 hereof or registration of transfer or exchange shall, if surrendered to any Person other than the Trustee, be
delivered to the Trustee and shall be promptly canceled by the Trustee. The Company may at any time deliver to the Trustee for cancellation any Trust Debt Securities previously authenticated and made available for delivery hereunder which the
Company may have acquired in any manner whatsoever, and all Trust Debt Securities so delivered shall be promptly canceled by the Trustee. The Company may not reissue or issue new Trust Debt Securities to replace Trust Debt Securities it has paid or
delivered to the Trustee for cancellation. No Trust Debt Securities shall be authenticated in lieu of or in exchange for any Trust Debt 

  

 18 

 
Securities canceled as provided in this Section 2.13, except as expressly permitted by this Indenture. All canceled Trust Debt Securities held by the Trustee
shall be disposed of in accordance with its customary procedures. 
  
 ARTICLE III 
 REDEMPTION 
  
 3.01    Redemption: Notice to Trustee. 
  

(a)    The Series II Trust Debt Securities are subject to redemption prior to maturity as provided therein. 
  
 (b)    The redemption terms for any additional series of
Trust Debt Securities shall be as specified in the supplemental indenture creating such series of Trust Debt Securities. 
  
 (c)    If any or all of the Trust Debt Securities are to be redeemed pursuant to Section 3.01 (a) or (b) hereof, the Company shall
deliver to the Trustee at least 45 days prior to the Redemption Date a Company Order specifying the series and principal amount of Trust Debt Securities to be redeemed and the Redemption Date and Redemption Price for such Trust Debt Securities. Such
Company Order shall be accompanied by a Board Resolution authorizing such redemption. If the Trust Debt Securities of a series are held by a Trust, the Company shall also deliver a copy of such Company Order to the Property Trustee for such Trust.

  
 3.02    Selection of Trust Debt
Securities to be Redeemed. 
  
 If less than all the
outstanding Trust Debt Securities of a series are to be redeemed at any time, the Trustee shall select the Trust Debt Securities of such series to be redeemed by lot or by any other method the Trustee considers fair and appropriate. The Trustee
shall make the selection at least 30 but not more than 60 days before the Redemption Date from outstanding Trust Debt Securities of such series not previously called for redemption. Provisions of this Indenture that apply to Trust Debt Securities
called for redemption also apply to portions of Trust Debt Securities called for redemption. The Trustee shall notify the Company promptly of the Trust Debt Securities or portions of Trust Debt Securities to be redeemed. 
  
 3.03    Notice of Redemption. 
  
 At least 30 days but not more than 60 days before the Redemption Date, the
Trustee, in the Company’s name and at the Company’s expense, shall mail or cause to be mailed a notice of redemption by first-class mail, postage prepaid, to each Holder of Trust Debt Securities to be redeemed at such Holder’s last
address as it appears in the Register. 
  
 The notice of
redemption shall identify the Trust Debt Securities to be redeemed, including its CUSIP number, the provision of the Trust Debt Securities or this Indenture pursuant to which the Trust Debt Securities called for redemption are being redeemed and
shall state: 
  
 (1)    the
Redemption Date; 
  
 (2)    the Redemption Price; 
  

 19 

 (3)    the name and address of the Paying Agent; 
  
 (4)    that payment of the Redemption
Price of Trust Debt Securities called for redemption will be made only upon surrender of such Trust Debt Securities to the Paying Agent; 
  
 (5)    if fewer than all the outstanding Trust Debt Securities of any series are to be redeemed, the identification
and principal amounts of the particular Trust Debt Securities to be redeemed and that, on and after the Redemption Date, upon surrender of such Trust Debt Securities, a new Trust Debt Security or Trust Debt Securities of the same series and of like
tenor and in a principal amount equal to the unredeemed portion thereof will be issued; and 
  
 (6)    that, unless the Company defaults in paying the Redemption Price of the Trust Debt Securities called for
redemption, plus accrued interest thereon to the Redemption Date, interest will cease to accrue on such Trust Debt Securities on and after the Redemption Date. 
  

Any notice of redemption given in the manner provided herein shall be conclusively presumed to have been given, whether or not such notice is actually
received. Failure to mail any notice or defect in the mailed notice or the mailing thereof in respect of any Trust Debt Security shall not affect the validity of the redemption of any other Trust Debt Security. 
  
 3.04    Effect of Notice of Redemption.

  
 After notice of redemption has been given, Trust Debt
Securities called for redemption shall become due and payable on the Redemption Date and at the Redemption Price and from and after the Redemption Date (unless the Company shall default in the payment of the Redemption Price and accrued interest),
such Trust Debt Securities shall cease to bear interest. Upon the later of the Redemption Date and the date such Trust Debt Securities are surrendered to the Paying Agent, such Trust Debt Securities shall be paid the Redemption Price, plus accrued
interest to the Redemption Date, provided that installments of interest on Trust Debt Securities with an Interest Payment Date which is on or prior to the Redemption Date shall be payable to the Holders of such Trust Debt Securities, or one or more
Predecessor Trust Debt Securities, registered as such at the close of business on the Regular Record Dates therefor according to their terms and provisions. 
  
 3.05    Deposit of Redemption Price. 
  

Prior to 10:00 a.m. on the Redemption Date, the Company shall deposit with the Paying Agent (or if the Company or an Affiliate is the Paying Agent,
shall segregate and hold in trust or cause such Affiliate to segregate and hold in trust) money sufficient to pay the Redemption Price of, and accrued interest on, all Trust Debt Securities to be redeemed on that Redemption Date. The Paying Agent
shall return to the Company any money in excess of the amount sufficient to pay the Redemption Price of, and accrued interest on, all Trust Debt Securities to be redeemed and any interest accrued on the amount deposited pursuant to this Section
3.05. 
  

 20 

 3.06    Trust Debt Securities Redeemed in Part. 
  
 Upon surrender of a Trust Debt Security that is redeemed in part, the Trustee
shall authenticate for the Holder a new Trust Debt Security of the same series and in a principal amount equal to the unredeemed portion of such Trust Debt Security. 
  
 ARTICLE IV 
 COVENANTS 
  
 4.01    Payment of Trust Debt Securities. 
  
 (a)    The Company shall pay the principal of and premium, if any, and interest (including interest accruing during an Extension Period and/or on or after the filing of a petition in bankruptcy or
reorganization relating to the Company, whether or not a claim for post-filing interest is allowed in such proceeding) on the Trust Debt Securities on or prior to the dates and in the manner provided in such Trust Debt Securities or pursuant to this
Indenture. An installment of principal, premium, if any, or interest shall be considered paid on the applicable due date if on such date the Trustee or the Paying Agent holds, in accordance with this Indenture, money sufficient to pay all of such
installment then due. With respect to any Trust Debt Security, the Company shall pay interest on overdue principal and interest on overdue installments of interest (including interest accruing during an Extension Period and/or on or after the filing
of a petition in bankruptcy or reorganization relating to the Company, whether or not a claim for post-filing interest is allowed in such proceeding), to the extent lawful, at the rate per annum borne by such Trust Debt Security, compounded
quarterly. Interest on overdue interest shall accrue from the date such amounts become overdue. 
  
 (b)    Notwithstanding the provisions of Section 4.01(a) hereof or any other provision herein to the contrary, the
Company shall have the right in its sole and absolute discretion at any time and from time to time while the Trust Debt Securities of any series are outstanding, so long as no Event of Default with respect to such series of Trust Debt Securities has
occurred and is continuing, to defer payments of interest by extending the interest payment period for such series of Trust Debt Securities for the Extension Period, if any, for such series of Trust Debt Securities, provided that such Extension
Period shall not extend beyond the Stated Maturity Date or Redemption Date of any Trust Debt Security of such series, and provided further that at the end of each Extension Period the Company shall pay all interest then accrued and unpaid (together
with interest thereon to the extent permitted by applicable law at the rate per annum then borne by such Trust Debt Securities). Prior to the termination of an Extension Period, the Company may shorten or may further extend the interest payment
period for such series of Trust Debt Securities, provided that such Extension Period together with all such previous and further extensions may not exceed the maximum duration of the Extension Period for such series of Trust Debt Securities or
extend beyond the Stated Maturity Date or Redemption Date of any Trust Debt Security of such series. The Company shall give the Trustee notice of the Company’s election to begin an Extension Period for any series of Trust Debt Securities and
any shortening or extension thereof at least one Business Day prior to the date the notice of the record or payment date of the related distribution on the Preferred Trust Securities issued by the Trust which is the Holder of the Trust Debt
Securities of such series or the date payment of interest on such Trust Debt Securities is required to be given to any national securities exchange on which 

  

 21 

 
such Preferred Trust Securities or Trust Debt Securities are then listed or other applicable self-regulatory organization, but in any event not less than two
Business Days prior to the Record Date fixed by the Company for the payment of such interest. The Company shall give or cause the Trustee to give notice (a form of which shall be provided by the Company to the Trustee) of the Company’s election
to begin an Extension Period to the Holders by first class mail, postage prepaid. 
  
 4.02    Prohibition Against Dividends, etc. 
  
 The Company shall not if at such time (i) there shall have occurred and is continuing any Default or Event of Default, (ii) during an Extension Period, or
(iii) the Company shall be in default with respect to any payment or other obligations under the Trust II Preferred Securities Guarantee Agreement or any similar guarantee with respect to any outstanding Preferred Trust Securities issued by any
Trust (other than Trust II), (a) declare or pay any dividend on, make any distribution or other payments with respect to, or redeem, purchase, acquire or make any liquidation payment with respect to, any of its Capital Stock (other than (1)
repurchases, redemptions or other acquisitions of shares of the Company’s capital stock in connection with the satisfaction by the Company of its obligations under any employee benefit plans, (2) as a result of an exchange or conversion of one
class or series of the Company capital stock for another class or series of the Company capital stock, or (3) the purchase of fractional interests in shares of the Company capital stock pursuant to the conversion or exchange provisions of such
capital stock on the security being converted or exchanged), (b) pay principal, interest or premium, if any, on or repay, repurchase or redeem any debt securities that rank pari passu with or junior to the Trust Debt Securities, or (c) make any
guarantee payments with respect to any outstanding Preferred Trust Securities issued by any Trust or other entity. 
  
 4.03    SEC Reports. 
  
 The Company shall file with the Trustee, within 15 days after it files them with the SEC, copies of its annual report and of the information, documents
and other reports (or copies of such portions of any of the foregoing as the SEC may by rules and regulations prescribe) which the Company is required to file with the SEC pursuant to Section 13 or 15(d) of the Exchange Act. If the Company is not
subject to the reporting requirements of Section 13 or 15(d) of the Exchange Act, the Company shall file with the Trustee such information, documents and other reports (or copies of such portions of any of the foregoing as the SEC may by rules and
regulations prescribe) which are specified in Sections 13 or 15(d) of the Exchange Act. The Company shall also comply with the provisions of Section 314(a) of the TIA. Delivery of such reports, information and documents to the Trustee is for
informational purposes only and the Trustee’s receipt of such shall not constitute constructive notice of any information contained therein or determinable from information contained therein, including the Company’s compliance with any of
its covenants hereunder (as to which the Trustee is entitled to conclusively rely exclusively on Officer’s Certificates). 
  
 4.04    Compliance Certificates. 
  
 (a)    The Company shall deliver to the Trustee, within 90 days after the end of each of the Company’s fiscal
years, an Officer’s Certificate stating whether or not the signer knows of any Default or Event of Default. Such certificate shall contain a certification from the principal executive officer, principal financial officer or principal accounting
officer of the Company as to his or her knowledge of the Company’s compliance with all conditions and covenants under this Indenture. For purposes of this Section 4.04(a), such compliance shall be determined without regard to any period of
grace or requirement of notice provided under this Indenture. If such Officer does know of such a Default or Event of Default, the Officer’s Certificate shall describe any such Default or Event of Default, and its status. Such Officer’s
Certificate need not comply with Sections 11.04 and 11.05 hereof. 
  

 22 

 (b)    The Company shall deliver to the Trustee any information
reasonably requested by the Trustee in connection with the compliance by the Trustee or the Company with the TIA. 
  
 4.05    Further Instruments and Acts. 
  

The Company shall execute and deliver such further instruments and do such further acts as may be reasonably requested by the Trustee as necessary or
proper to carry out more effectively the purposes of this Indenture. 
  
 4.06    Payments for Consents. 
  
 Neither the Company nor any Subsidiary shall, directly or indirectly, pay or cause to be paid any consideration, whether by way of interest, fee or otherwise, to any Holder of any Trust Debt Securities for or as an inducement to any
consent, waiver or amendment of any of the terms or provisions of this Indenture or the Trust Debt Securities unless such consideration is offered to be paid or agreed to be paid to all Holders of the Trust Debt Securities who so consent, waive or
agree to amend in the time frame set forth in the documents soliciting such consent, waiver or agreement. 
  
 4.07    Payment of Expenses of Trusts. 
  

The Company covenants for the benefit of the Holders of the Trust Debt Securities to pay all of the obligations, costs and expenses of the applicable
Trust in accordance with the applicable Trust agreement and to pay the taxes of such Trust in accordance with such Trust agreement in order to permit such Trust to make distributions on and redemptions of its Preferred Trust Securities in accordance
with their terms. 
  
 ARTICLE V 
 SUCCESSOR CORPORATION 
  
 5.01    When the Company May Merge, Etc. 
  
 The Company may not consolidate with or merge with or into, or sell, convey, transfer or lease its properties and assets as
an entirety or substantially as an entirety (either in one transaction or a series of transactions) to, any Person unless: 
  
 (1)    the Successor if other than the Company (a) is a corporation organized and existing under the laws of the
United States of America or any State thereof or the District of Columbia, and (b) shall expressly assume by a supplemental indenture, executed and delivered to the Trustee, in form satisfactory to the Trustee, all the obligations of the Company
under the Trust Debt Securities and the Indenture; 
 (2)    immediately prior to and after giving effect
to such transaction (and treating any Indebtedness which becomes an obligation of the Successor Person or any Subsidiary as a result of such transaction as having been incurred by such Person or such Subsidiary at the time of such transaction), no
Default or Event of Default shall have occurred and be continuing; and 
  

 23 

 (3)     the Company delivers to the Trustee an Officer’s
Certificate and an Opinion of Counsel, each stating that such consolidation, merger, sale, conveyance, transfer or lease and such supplemental indenture comply with this Indenture. 
  
 The Successor will be the successor to the Company, and will be substituted for, and may exercise every right and power and
become the obligor on the Trust Debt Securities with the same effect as if the Successor had been named as the Company herein but, in the case of a sale, conveyance, transfer or lease of all or substantially all of the assets of the Company, the
predecessor Company will not be released from its obligation to pay the principal of and premium, if any, and interest on the Trust Debt Securities. 
  
 ARTICLE VI 
 DEFAULTS AND REMEDIES

 6.01    Events of Default. 
  
 An “Event of Default” occurs with respect to the Trust Debt Securities of any series if one of the following shall
have occurred and be continuing: 
  
 (1)    The Company defaults in the payment, when due and payable, of (a) interest on any Trust Debt Security of that series and the default continues for a period of 30 days; provided, that during an Extension Period for
the Trust Debt Securities of that series, failure to pay interest on the Trust Debt Securities of that series shall not constitute a Default or Event of Default hereunder, or (b) the principal of or premium, if any, on any Trust Debt Securities of
that series when the same becomes due and payable on the Stated Maturity Date thereof, upon acceleration, on any Redemption Date, or otherwise; 
  
 (2)    The Company defaults in the performance of or fails to comply with any of its other covenants or agreements in
the Trust Debt Securities of that series or this Indenture or in any supplemental indenture under which the Trust Debt Securities of that series may have been issued and such failure continues for 60 days after receipt by the Company of a
“Notice of Default”; 
  
 (3)    The Company, pursuant to or within the meaning of any Bankruptcy Law: 
  
 (a)    commences a voluntary case or proceeding; 
  
 (b)    consents to the entry of an order for relief against it in an involuntary case or
proceeding; 
  
 (c)    consents to the appointment of a Custodian of it or for all or substantially all of its property, and such Custodian is not discharged within 60 days; 
  
 (d)    makes a general assignment for the benefit of its creditors; or 
  
 (e)    admits in writing its inability to
pay its debts generally as they become due; or 
  

 24 

 (4)    A court of competent jurisdiction enters an order or decree
under any Bankruptcy Law that: 
  
 (a)    is for relief against the Company in an involuntary case or proceeding; 
  
 (b)    appoints a Custodian of the Company for all or substantially all of its properties; or 
  
 (c)    orders the liquidation of the
Company, 
  
 and in each case the order or decree
remains unstayed and in effect for 60 days. 
  
 The foregoing will
constitute an Event 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. 
  
 A Default under
clause (2) above is not an Event of Default until (i) the Trustee provides a “Notice of Default” to the Company or the Holders of at least 25% in aggregate principal amount of the Trust Debt Securities of that series at the time
outstanding or, if that series of Trust Debt Securities is held by a Trust, the holders of at least 25% in aggregate liquidation amount of the outstanding Preferred Trust Securities of that Trust provide a “Notice of Default” to the
Company and the Trustee and (ii) the Company does not cure such Default within the time specified in clause (2) above after receipt of such notice. Any such notice must specify the Default, demand that it be remedied and state that such notice is a
“Notice of Default.” 
  
 6.02    Acceleration. 
  
 If
any Event of Default with respect to the Trust Debt Securities of any series other than an Event of Default under clause (3) or (4) of Section 6.01 hereof occurs and is continuing, the Trustee or the Holders of at least 25% in aggregate principal
amount of the Trust Debt Securities of that series then outstanding may declare the principal of all the Trust Debt Securities of that series due and payable, provided that in the case of a series of Trust Debt Securities then held by a Trust, if
upon an Event of Default with respect to the Trust Debt Securities of that series the Trustee has or the Holders of at least 25% in aggregate principal amount of the Trust Debt Securities of that series have failed to declare the principal of the
Trust Debt Securities of that series to be immediately due and payable, the holders of at least 25% in aggregate liquidation amount of the outstanding Preferred Trust Securities of that Trust shall have such right by a notice in writing to the
Company and the Trustee. If an Event of Default specified in clause (3) or (4) of Section 6.01 hereof occurs, the principal of and interest on all the Trust Debt Securities 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. Upon such an acceleration, such principal, together with all interest accrued thereon, shall be due and payable immediately. 
  
 The Holders of a majority in aggregate principal amount of the Trust Debt
Securities of that series at the time outstanding, in each case, by notice to the Trustee, may rescind such an acceleration and its consequences if the rescission would not conflict with any judgment or 

  

 25 

 
decree and if all existing Events of Default with respect to such series of Trust Debt Securities have been cured or waived except nonpayment of principal or
interest that has become due solely because of acceleration, provided that if the principal of a series of Trust Debt Securities has been declared due and payable by the holders of the Preferred Series of a Trust, no rescission of acceleration will
be effective unless consented to by the holders of a majority in aggregate liquidation amount of the Preferred Trust Securities of that Trust. No such rescission shall affect any subsequent Default or impair any right consequent thereto. 

 
 6.03    Other Remedies. 
  
 If an Event of Default occurs and is continuing, the Trustee may, in its own
name or as trustee of an express trust, institute, pursue and prosecute any proceeding, including, without limitation, any action at law or suit in equity or other judicial or administrative proceeding to collect the payment of principal of or
premium, if any, or interest on the Trust Debt Securities of the series that is in default, to enforce the performance of any provision of the Trust Debt Securities of that series or this Indenture or to obtain any other available remedy.

  
 The Trustee may maintain a proceeding even if it does not
possess any of the Trust Debt Securities or does not produce any of the Trust Debt Securities in the proceeding. A delay or omission by the Trustee, any Holder or the holders of Preferred Trust Securities in exercising any right or remedy accruing
upon an Event of Default shall not impair such right or remedy or constitute a waiver of, or acquiescence in, such Event of Default. No remedy is exclusive of any other remedy. All available remedies are cumulative. 
  
 6.04    Waiver of Past Defaults. 
  
 If a Default or Event of Default with respect to a series of Trust Debt
Securities has occurred and is continuing, the Holders of a majority in aggregate principal amount of the Trust Debt Securities of that series at the time outstanding, or, if that series of Trust Debt Securities is held by a Trust, the holders of a
majority in aggregate liquidation amount of the Preferred Trust Securities of that Trust, in each case by notice to the Trustee and the Company, may waive an existing Default or Event of Default and its consequences except a Default or Event of
Default in the payment of the principal of or premium, if any, or interest on any Trust Debt Security of that series. When a Default or Event of Default is waived, it is deemed cured and shall cease to exist, but no such waiver shall extend to any
subsequent or other Default or Event of Default or impair any consequent right. 
  
 6.05    Control by Majority. 
  
 The Holders of a majority in aggregate principal amount of the Trust Debt Securities of each series affected or, if that series of Trust Debt Securities is held by a Trust, the holders of a majority in aggregate
liquidation amount of the Preferred Trust Securities of that Trust, may direct the time, method and place of conducting any proceeding for any remedy available to the Trustee or of exercising any trust or power conferred on the Trustee. However, the
Trustee may refuse to follow any direction that conflicts with law or this Indenture or that the Trustee determines in good faith is unduly prejudicial to the rights of other Holders or may involve the Trustee in personal liability. The Trustee may
take any other action deemed proper by the 

  

 26 

 
Trustee which is not inconsistent with such direction, including withholding notice to the Holders of the Trust Debt Securities of continuing default (except
in the payment of the principal of (other than any mandatory sinking fund payment) or premium, if any, or interest on any Trust Debt Securities) if the Trustee considers it in the interest of the Holders of the Trust Debt Securities to do so.

  
 6.06    Limitation on Suits.

  
 Except as provided in Section 6.07 hereof, no holder of
Trust Debt Securities or holder of Preferred Trust Securities of the Trust which is the Holder of that series of Trust Debt Securities may pursue any remedy with respect to this Indenture or the Trust Debt Securities unless: 
  
 (1) the Holders of Trust Debt Securities or the holders of
such Preferred Trust Securities give to the Trustee written notice stating that an Event of Default with respect to the corresponding Trust Debt Securities is continuing; 
  
 (2) the Holders of at least 25% in aggregate principal amount of the Trust Debt Securities of that series or
the holders of at least 25% in aggregate liquidation amount of such Preferred Trust Securities make a written request to the Trustee to pursue a remedy; 
  
 (3) the Holders of Trust Debt Securities or the holders of such Preferred Trust Securities provide to the Trustee reasonable security and
indemnity satisfactory to the Trustee against any loss, liability or expense; 
  
 (4) the Trustee does not comply with the request within 60 days after receipt of the notice, the request and the offer of security and indemnity; and 
  
 (5) during such 60 day period, the Holders of a majority in aggregate principal amount of the Trust Debt
Securities of that series or the holders of a majority in aggregate liquidation amount of such Preferred Trust Securities do not give the Trustee a direction inconsistent with the request. 
  
 A Holder of Trust Debt Securities or a holder of Preferred Trust Securities
may not use this Indenture to prejudice the rights of another Holder or a holder of Preferred Trust Securities or to obtain a preference or priority over another Holder or holder of Preferred Trust Securities. 
  
 6.07    Rights of Holders to Receive Payment.

  
 Notwithstanding any other provision of this Indenture, the
right of any Holder to receive payment of the principal of and premium (if any) or interest on the Trust Debt Securities held by such Holder, on or after the respective due dates expressed in the Trust Debt Securities (in the case of interest, as
the same may be extended pursuant to Section 4.01(b) hereof) or any Redemption Date, is absolute and unconditional and such right and the right to bring suit for the enforcement of any such payment on or after such respective dates shall not be
impaired or affected adversely without the consent of such Holder. If the Trust Debt Securities of a series are then held by a Trust, each holder of Preferred Trust Securities of such Trust shall have the right to bring suit for the enforcement of
any payment due in respect of Trust Debt Securities of such 

  

 27 

 
series based on a principal amount thereof equal to the aggregate liquidation amount of the Preferred Trust Securities of such holder. 
  
 6.08    Collection Suit by the Trustee.

  
 If an Event of Default described in Section 6.01(1) hereof
occurs and is continuing, the Trustee may recover judgment in its own name and as trustee of an express trust against the Company or any obligor on the Trust Debt Securities for the whole amount owing with respect to the Trust Debt Securities and
the amounts provided for in Section 7.07 hereof. 
  
 6.09    The Trustee May File Proofs of Claim. 
  
 In case of the pendency of any receivership, insolvency, liquidation, bankruptcy, reorganization, arrangement, adjustment, composition or other judicial proceeding relative to the Company or its properties or assets,
the Trustee shall be entitled and empowered, by intervention in such proceeding or otherwise: 
  
 (1)    to file and prove a claim for the whole amount of the principal of and premium, if any, and interest on the
Trust Debt Securities and to file such 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 of the Holders allowed in such judicial proceeding; and 
  
 (2)    to collect and receive any moneys or other property payable or deliverable on any such claims and to distribute
the same; and any Custodian in any such judicial proceeding is hereby authorized by each Holder to make such 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 the
Trustee any amount due it for the reasonable compensation, expenses, disbursements and advances of the Trustee, its agents and counsel, and any other amounts due the Trustee under Section 7.07 hereof. 
  
 Nothing herein contained shall be deemed to authorize the Trustee to
authorize or consent to or accept or adopt on behalf of any Holder any plan of reorganization, arrangement, adjustment or composition affecting the Trust Debt Securities or the rights of any Holder thereof, or to authorize the Trustee to vote in
respect of the claim of any Holder in any such proceeding. 
  
 6.10    Priorities. 
  
 If the
Trustee collects any money pursuant to this Article 6, it shall, subject to Article 10 hereof, pay out the money in the following order: 
  

	 First:
	  	to the Trustee for amounts due under Section 7.07 hereof;
	 	  	 
	 Second:
	  	to Holders of Trust Debt Securities of the particular series in respect of which or for the benefit of which such money has been collected for amounts due and unpaid on such Trust
Debt Securities for the principal amount, Redemption Price or interest, if any, as the case may be, ratably, without preference or

  

 28 

	 	  	priority of any kind, according to such amounts due and payable on such Trust Debt Securities; and
	 	  	 
	 Third:
	  	the balance, if any, to the Company.

  
 Except as otherwise
set forth in the Trust Debt Securities, the Trustee may fix a Record Date and payment date for any payment to Holders pursuant to this Section 6.10. 
  
 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 (other than the Trustee) 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 Company, the Trustee, a
suit by a Holder of Trust Debt Securities or holder of Preferred Trust Securities pursuant to Section 6.07 hereof or a suit by Holders of Trust Debt Securities of more than 10% in aggregate principal amount of the Trust Debt Securities of any series
or, if a series of Trust Debt Securities is held by a Trust, the holders of more than 10% in aggregate liquidation amount of the Preferred Trust Securities of that Trust. 
  
 6.12    Waiver of Stay; Extension or Usury Laws. 
  
 The Company covenants (to the extent that it may lawfully do so) that it will
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 or any usury or other law wherever enacted, now or at any time hereafter in force, that would prohibit or forgive
the Company from paying all or any portion of the principal of or premium, if any, or interest on the Trust Debt Securities as contemplated herein or affect the covenants or the performance by the Company of its obligations under 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 covenants that it will not hinder, delay or impede the execution of any power herein granted to the Trustee, but will suffer
and permit the execution of every such power as though no such law had been enacted. 
  
 ARTICLE VII 
 THE TRUSTEE 
  
 7.01    Duties of the Trustee. 
  
 (a)    If an Event of Default occurs and is continuing with respect to the Trust Debt Securities of any
series, the Trustee shall exercise the rights and powers vested in it by this Indenture with respect to that series and use the same degree of care and skill in its exercise as a prudent man would exercise or use under the circumstances in the
conduct of his own affairs. 
  
 (b)    Except
during the continuance of an Event of Default with respect to the Trust Debt Securities of any series, (i) the Trustee need perform only those duties with respect to that series that are specifically set forth in this Indenture or the TIA and no
implied covenants or 

  

 29 

 
obligations shall be read into the 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 or opinions furnished to the Trustee and conforming to the requirements of this Indenture. However, in the case of any certificates or opinions
which by any provision hereof are specifically required to be furnished to the Trustee, the Trustee shall examine the certificates and opinions to determine whether or not they conform to the requirements of this Indenture. 
  
 (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 Section 7.01(c) does not limit the effect of Section 7.01(b) hereof; 
  
 (ii)    the Trustee shall not be liable
for any error of judgment made in good faith by a Responsible 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 hereof. 
  
 (d)    Every provision of this Indenture that in any way relates to the Trustee is subject to Section 7.01(a), (b), (c) and (e) and
Section 7.02 hereof. 
  
 (e)    The Trustee
may refuse to perform any duty or exercise any right or power or extend or risk its own funds or otherwise incur any financial liability unless it receives security and indemnity reasonably satisfactory to it against any loss, liability or expense
(including reasonable counsel fees). 
  
 (f)    Money held by the Trustee in trust hereunder need not be segregated from other funds except to the extent required by law. Except as otherwise provided in Section 3.05 and Section 8.01 hereof, the Trustee shall
not be liable for interest on any money held by it hereunder. 
  
 7.02    Rights of the Trustee. 
  
 (a)    The Trustee may conclusively rely on any document (whether in original or facsimile form) reasonably 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 Officer’s Certificate and, if appropriate, an Opinion of Counsel. The Trustee shall not be liable for any action it takes or omits to take in
good faith in reliance on such Officer’s Certificate and Opinion of Counsel. 
  
 (c)    The Trustee may act through agents and shall not be responsible for the misconduct or negligence of any agent appointed with due care. 
  

 30 

 (d)    The Trustee shall not be liable for any action it takes or omits to take in
good faith which it reasonably believes to be authorized or within its rights or powers. 
  
 (e)    The Trustee may consult with counsel of its selection and the advice of such counsel or any Opinion of Counsel shall be full and complete authorization and protection in respect of any
action taken, suffered or omitted 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 reasonable security and indemnity satisfactory to it against the costs, expenses and liabilities (including reasonable counsel fees) which might be incurred by it in compliance with such request
or direction. 
  
 (g)    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 inquiry or 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 to examine the books, records and premises of the Company, personally or by agent or attorney at the sole cost of the Company upon ten Business Days advance written notice and during regular business hours and shall incur no liability or
additional liability of any kind by reason of such inquiry or investigation. 
  
 (h)    The Trustee may execute any of the trusts or powers hereunder or perform any duties hereunder either directly or by or through agents or attorneys and the Trustee shall not be responsible
for any misconduct or negligence on the part of any agent or attorney appointed with due care by it hereunder. 
  
 (i)    The Trustee shall not be deemed to have notice of any Default or Event of Default unless a Responsible Officer of the Trustee
has actual knowledge thereof or unless written notice of any event which is in fact such a default is received by the Trustee at the Corporate Trust Office of the Trustee, and such notice references the Securities and this Indenture. 
  
 (j)    The rights, privileges, protections, immunities
and benefits given to the Trustee, including, without limitation, its right to be indemnified, are extended to, and shall be enforceable by, the Trustee in each of its capacities hereunder, and each agent, custodian and other Person employed to act
hereunder. 
  
 (k)    The Trustee may request
that the Company deliver an Officers’ Certificate setting forth the names of individuals and/or titles of officers authorized at such time to take specified actions pursuant to this Indenture, which Officers’ Certificate may be signed by
any person authorized to sign an Officers’ Certificate, including any person specified as so authorized in any such certificate previously delivered and not superseded. 
  

 31 

 7.03    Individual Rights of the Trustee. 
  
 The Trustee in its individual or any other capacity may become the owner or
pledgee of Trust Debt Securities and may otherwise deal with the Company or its Affiliates with the same rights it would have if it were not Trustee. Any Paying Agent, Registrar or co-registrar may do the same with like rights. However, the Trustee
must comply with Sections 7.10 and 7.11 hereof. 
  
 7.04    The Trustee’s Disclaimer. 
  
 The recitals contained herein and in the Trust Debt Securities, except the Trustee’s certificates of authentication, shall be taken as the statements of the Company, and the Trustee assumes no responsibility for
their correctness. The Trustee makes no representation as to the validity or sufficiency of this Indenture or of the Trust Debt Securities. The Trustee shall not be accountable for the use or application by the Company of the Trust Debt Securities
or the proceeds thereof. 
  
 7.05    Notice
of Defaults. 
  
 If a Default occurs and is continuing with
respect to the Trust Debt Securities of any series and if it is known to the Trustee, the Trustee shall mail to each Holder of a Trust Debt Security of that series notice of the Default within 90 days after it becomes known to the Trustee unless
such Default shall have been cured or waived. Except in the case of a Default described in Section 6.01(1) hereof, the Trustee may withhold such notice if and so long as a committee of its Trust Officers in good faith determines that the withholding
of such notice is in the interests of the Holders of the Trust Debt Securities of that series. The Trustee shall not be charged with knowledge of any Default (except in the case of a Default under Section 6.01(1) hereof) unless a Responsible Officer
assigned to the Corporate Trust Department of the Trustee shall have actual knowledge of the Default. The second sentence of this Section 7.05 shall be in lieu of the proviso to TIA Section 315(b). Said proviso is hereby expressly excluded from this
Indenture, as permitted by the TIA. 
  
 7.06    Reports by Trustee to Holders. 
  
 Within 60 days after each May 15, beginning with the May 15 next following the date of this Indenture, the Trustee shall mail to each Holder, and such other holders that have submitted their names to the Trustee for
such purpose, a brief report dated as of such May 15 in accordance with and to the extent required under TIA Section 313. 
  
 A copy of each report at the time of its mailing to Holders shall be filed with the Company, the SEC and any securities exchange on which the Trust Debt
Securities are listed. The Company agrees to promptly notify the Trustee whenever the Trust Debt Securities become listed on any securities exchange and of any listing thereof. 
  
 7.07    Compensation and Indemnity. 
  
 The Company agrees: 
  

 32 

 (1)    to pay to the Trustee from time to time such compensation as shall be agreed
in writing between the Company and the Trustee for all services rendered by it hereunder (which compensation shall not be limited by any provision of law in regard to the compensation of a trustee of an express trust); 
  
 (2)    to reimburse the Trustee upon its request for
reasonable expenses, disbursements and advances incurred or made by the Trustee in accordance with any provision of this Indenture (including the reasonable compensation and the expenses, and advances of its agents and counsel, provided that prior
to any Event of Default, the Trustee shall only have one counsel), including all reasonable expenses and advances incurred or made by the Trustee in connection with any Event of Default or any membership on any creditors’ committee, except any
such expense or advance as may be caused by its own negligence or willful misconduct; and 
  
 (3)    to indemnify the Trustee, its officers, directors and shareholders, for, and to hold it harmless against, any and all loss, claim, damage, liability or expense, including taxes (other than
taxes based upon the income of the Trustee), incurred without negligence or willful misconduct on its part, arising out of or in connection with the acceptance or administration of this Trust, including the costs and expenses of defending itself
against any claim (whether asserted by the Company, any Holder or any other person) or liability in connection with the exercise or performance of any of its powers or duties hereunder. 
  
 Before, after or during an Event of Default with respect to the Trust Debt Securities of a series, the Trustee shall have a
claim and lien prior to the Trust Debt Securities of that series as to all property and funds held by it hereunder for any amount owing it for its fees and expenses or any predecessor Trustee pursuant to this Section 7.07, except with respect to
funds held by the Trustee or any Paying Agent in trust for the payment of principal of or premium, if any, or interest on particular Trust Debt Securities pursuant to Section 2.06 or Section 8.01 hereof. 
  
 The Company’s obligations pursuant to this Section 7.07 are not subject
to Article 10 of this Indenture and shall survive the discharge of this Indenture and the removal or resignation of the Trustee. When the Trustee renders services or incurs expenses after the occurrence of a Default specified in Section 6.01 hereof,
the compensation for services and expenses are intended to constitute expenses of administration under any Bankruptcy Law. 
  
 7.08    Replacement of Trustee. 
  
 The Trustee may resign at any time, by so notifying the Company in writing at least 30 days prior to the date of the proposed resignation; provided,
however, no such resignation shall be effective until a successor Trustee has accepted its appointment pursuant to this Section 7.08. The Holders of at least a majority in aggregate principal amount of the Trust Debt Securities at the time
outstanding may remove the Trustee by so notifying the Trustee in writing and may appoint a successor Trustee, which shall be subject to the consent of the Company unless an Event of Default has occurred and is continuing. The Trustee shall resign
if: 
  
 (1)    the Trustee
fails to comply with Section 7.10 hereof; 
  

 33 

 (2)    the Trustee is adjudged bankrupt or insolvent; 
  
 (3)    a receiver or public officer takes
charge of the Trustee or its property; or 
  
 (4)    the Trustee otherwise becomes incapable of acting. 
  
 If the Trustee resigns or is removed or if a vacancy exists in the office of Trustee for any reason, 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. 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 Holders. Subject to payment of all amounts owing to the Trustee under Section 7.07 hereof and subject further to its lien under Section 7.07, the retiring Trustee shall
promptly transfer all property held by it as Trustee to the successor Trustee. If a successor Trustee does not take office within one year after the retiring Trustee resigns or is removed, the retiring Trustee (at the expense of the Company), the
Company or the Holders of at least a majority in aggregate principal amount of the Trust Debt Securities at the time outstanding may petition any court of competent jurisdiction for the appointment of a successor Trustee. 
  
 If the Trustee fails to comply with Section 7.10 hereof, any Holder may
petition any court of competent jurisdiction for its removal and the appointment of a successor Trustee. 
  
 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, the resulting, surviving or transferee corporation without any further act shall be the successor Trustee. 
  
 7.10    Eligibility: Disqualification. 
  

The Trustee shall at all times satisfy the requirements of TIA Sections 310(a)(1) and 310(a)(2). The Trustee (or any Affiliate thereof which has
unconditionally guaranteed the obligations of the Trustee hereunder) shall have a combined capital and surplus of at least $50,000,000 as set forth in its most recently published annual report of condition. The Trustee shall comply with TIA Section
310(b). In determining whether the Trustee has conflicting interests as defined in TIA Section 310(b)(1), the provisions contained in the proviso to TIA Section 310(b)(1) and the Trustee’s Statement of Eligibility on Form T-1 shall be deemed
incorporated herein. 
  
 7.11    Preferential Collection of Claims Against the Company. 
  
 If and when the Trustee shall be or become a creditor of the Company, the Trustee shall be subject to the provisions of the TIA regarding the collection
of claims against the Company. 
  

 34 

 ARTICLE VIII 
 SATISFACTION AND DISCHARGE OF INDENTURE; 
 DEFEASANCE OF CERTAIN OBLIGATIONS; UNCLAIMED MONEYS

  
 8.01    Satisfaction and Discharge
of Indenture. 
  
 The Company shall be deemed to have paid and
discharged the entire indebtedness on any series of the Trust Debt Securities outstanding on the date the Company has irrevocably deposited or caused to be irrevocably deposited with the Trustee or any Paying Agent as trust funds in trust,
specifically pledged as security for, and dedicated solely to, the benefit of the Holders of the Trust Debt Securities of such series (1) cash (which may be held in an interest bearing account insured by the Federal Deposit Insurance Corporation) in
an amount, or (2) U.S. Government Obligations, maturing as to principal and interest at such times and in such amounts as will ensure the availability of cash, or (3) a combination thereof, sufficient to pay the principal of and premium, if any, and
interest on all Trust Debt Securities of such series then outstanding on the scheduled due dates therefor, provided that the following conditions shall have been met: 
  
 (A)    no Default or Event of Default with respect to the Trust Debt Securities of such
series has occurred and is continuing on the date of such deposit or occurs as a result of such deposit; 
  
 (B)    the Company has delivered to the Trustee an Officer’s Certificate certifying that there does not exist (i)
a default in the payment of all or any portion of any Senior Indebtedness or (ii) any other default affecting Senior Indebtedness permitting its acceleration as the result of which the maturity of Senior Indebtedness has been accelerated;

  
 (C)    the Company has
delivered to the Trustee (i) either a private Internal Revenue Service ruling or an Opinion of Counsel to the effect that, based on a change in law occurring after the execution of this Indenture, the Holders of the Trust Debt Securities of such
series will not recognize income, gain or loss for federal income tax purposes as a result of such deposit, defeasance and discharge and will be subject to federal income tax on the same amount and in the manner and at the same times as would have
been the case if such deposit, defeasance and discharge had not occurred, and an Opinion of Counsel to the effect that (A) the deposit shall not result in the Company, the Trustee or, if the Trust Debt Securities of such series are held by a Trust,
such Trust being deemed to be an “investment company” under the Investment Company Act of 1940, as amended, and (B) such deposit creates a valid trust in which the Holders of the Trust Debt Securities of such series have the sole
beneficial interest or that the Holders of the Trust Debt Securities of such series have a nonavoidable first priority security interest in such trust; and 
  
 (D)    the Company has delivered to the Trustee an Officer’s Certificate and an Opinion of Counsel, each stating
that all conditions precedent relating to the defeasance contemplated by this provision have been complied with. 
  

 35 

 Upon such deposit, provisions of this Indenture with respect to such series of Trust Debt Securities
shall no longer be in effect (except as to (1) the rights of registration of transfer and exchange of Trust Debt Securities of such series, (2) the replacement of apparently mutilated, defaced, destroyed, lost or stolen Trust Debt Securities of such
series, (3) the rights of the Holders of the Trust Debt Securities of such series to receive payments of the principal thereof and premium, if any, and interest thereon, (4) the rights of the Holders of the Trust Debt Securities of such series as
beneficiaries hereof with respect to the property so deposited with the Trustee payable to all or any of them, (5) the obligation of the Company to maintain an office or agency for payments on and registration of transfer of the Trust Debt
Securities of such series, (6) the rights, obligations and immunities of the Trustee hereunder, and (7) the obligations of the Company to the Trustee for compensation and indemnity under Section 7.07 hereof), and the Trustee shall, at the request
and expense of the Company, execute proper instruments acknowledging the same. 
  
 8.02    Application by Trustee of Funds Deposited for Payment of Trust Debt Securities. 
  
 Subject to Section 8.04 hereof, all moneys deposited with the Trustee pursuant to Section 8.01 hereof shall be held in trust and applied by it to the
payment, either directly or through any Paying Agent (including the Company acting as its own Paying Agent), to the Holders of the Trust Debt Securities of the series for the payment or redemption of which such moneys have been deposited with the
Trustee, of all sums due and to become due thereon for principal and interest; but such money need not be segregated from other funds except to the extent required by law. 
  
 8.03    Repayment of Moneys Held by Paying Agent. 
  
 In connection with the satisfaction and discharge of this Indenture, all
moneys then held by any Paying Agent under this Indenture shall, upon demand of the Company, be repaid to it or paid to the Trustee, and thereupon such Paying Agent shall be released from all further liability with respect to such moneys.

  
 8.04    Return of Moneys Held by the
Trustee and Paying Agent Unclaimed for Three Years. 
  
 Any
moneys deposited with or paid to the Trustee or any Paying Agent for the payment of the principal of and premium, if any, or interest on the Trust Debt Securities of any series and not applied but remaining unclaimed for three years after the date
when such principal, premium, if any, or interest shall have become due and payable shall, unless otherwise required by mandatory provisions of applicable escheat or abandoned or unclaimed property law, be repaid to the Company by the Trustee or
such Paying Agent, and the Holders of such Trust Debt Securities shall, unless otherwise required by mandatory provisions of applicable escheat or abandoned or unclaimed property laws, thereafter look only to the Company for any payment which such
Holder may be entitled to collect, and all liability of the Trustee or any Paying Agent with respect to such moneys shall thereupon cease. 
  

 36 

 ARTICLE IX 
 AMENDMENTS 
  
 9.01    Without Consent of Holders. 
  
 From time to time, when authorized by a resolution of the Board of Directors, the Company and the Trustee, without notice to or the consent of any Holders of the Trust Debt Securities, may amend or supplement this Indenture: 
  
 (1)    to cure any ambiguity, defect or
inconsistency; 
  
 (2)    to
comply with Article 5 hereof; 
  
 (3)    to provide for uncertificated Trust Debt Securities in addition to or in place of certificated Trust Debt Securities; 
  
 (4)    to make any other change that does not in the reasonable judgment of the Company adversely affect the rights of
any Holder; 
  
 (5)    to
comply with any requirement of the SEC in connection with the qualification of this Indenture under the TIA; or 
  
 (6)    to set forth the terms and conditions, which shall not be inconsistent with this Indenture, of any series of
Trust Debt Securities (other than the Series II Trust Debt Securities) that are to be issued hereunder and the form of Trust Debt Securities of such series. 
  
 9.02    With Consent of Holders. 
  
 The Company and the Trustee may amend this Indenture in any manner not permitted by Section 9.01 or may waive future compliance by the Company with any
provisions of this Indenture with the consent of the Holders of a majority in aggregate principal amount of the Trust Debt Securities of each series affected thereby. Such an amendment or waiver may not, without the consent of each Holder of the
Trust Debt Securities affected thereby: 
  
 (1)    reduce the principal amount of such Trust Debt Securities; 
  
 (2)    reduce the principal amount of such Trust Debt Securities the Holders of which must consent to an amendment of
this Indenture or a waiver; 
  
 (3)    change the stated maturity of the principal of or the interest on or rate of interest on such Trust Debt Securities or the manner of calculation thereof; 
  
 (4)    change adversely to the Holders
the redemption provisions of Article 3 hereof; 
  
 (5)    change the currency in respect of which the payments on such Trust Debt Securities are to be made; 
  

 37 

 (6)    make any change in Article 10 hereof that adversely affects
the rights of the Holders of the Trust Debt Securities or any change to any other Section hereof that adversely affects their rights under Article 10 hereof; or 
  

(7)    change Section 6.07 hereof; 
  
 provided that, in the case of the outstanding Trust Debt Securities of a series then held by a Trust, no such amendment shall be made that
adversely affects the holders of the Preferred Trust Securities of that Trust, and no waiver of any Event of Default with respect to the Trust Debt Securities of that series or compliance with any covenant under this Indenture shall be effective,
without the prior consent of the holders of a majority of the aggregate liquidation amount of the outstanding Preferred Trust Securities of that Trust or the holder of each such Preferred Trust Security, as applicable. 
  
 A supplemental indenture that changes or eliminates any covenant or other
provision of this Indenture that has expressly been included solely for the benefit of one or more particular series of Trust Debt Securities, or which modifies the rights of the Holders of Trust Debt Securities of such series with respect to such
covenant or other provision, shall be deemed not to affect the rights under this Indenture of the Holders of Trust Debt Securities of any other series. 
  
 It shall not be necessary for the consent of the Holders of Trust Debt Securities or holders of Preferred Trust Securities 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. 
  
 If certain Holders agree to defer or waive certain obligations of the Company hereunder with respect to Trust Debt Securities held by them, such deferral
or waiver shall not affect the rights of any other Holder to receive the payment or performance required hereunder in a timely manner. 
  
 After an amendment or waiver under this Section 9.02 becomes effective, the Company shall mail to each Holder a notice briefly describing the amendment or
waiver. Any failure of the Company to mail such notices, or any defect therein, shall not, however, in any way impair or affect the validity of such amendment or waiver. 
  
 9.03    Compliance with Trust Indenture Act. 
  
 Every supplemental indenture executed pursuant to this Article 9 shall comply
with the TIA. 
  
 9.04    Revocation and
Effect of Consents; Waivers and Actions. 
  
 Until an
amendment, waiver or other action by Holders becomes effective, a consent to it or any other action by a Holder of a Trust Debt Security hereunder is a continuing consent by the Holder and every subsequent Holder of that Trust Debt Security or
portion of the Trust Debt Security that evidences the same obligation as the consenting Holder’s Trust Debt Security, even if notation of the consent, waiver or action is not made on such Trust Debt Security. However, any such Holder or
subsequent Holder may revoke the consent, waiver or action as to such Holder’s Trust Debt Security or portion of the Trust Debt Security if the Trustee receives the 

  

 38 

 
notice of revocation before the consent of the requisite aggregate principal amount of such Trust Debt Securities then outstanding has been obtained and not
revoked. After an amendment, waiver or action becomes effective, it shall bind every Holder of the Trust Debt Securities of the related series, except as provided in Section 9.02 hereof. 
  
 The Company may, but shall not be obligated to, fix a Record Date for the purpose of determining the Persons entitled to
consent to any amendment or waiver. If a Record Date is fixed, then, notwithstanding the first two sentences of the immediately preceding paragraph, only Holders of Trust Debt Securities or holders of Preferred Trust Securities, as applicable, on
such Record Date or their duly designated proxies, and only those Persons, shall be entitled to consent to such amendment, supplement or waiver or to revoke any consent previously given, whether or not such Persons continue to be such after such
Record Date. No such consent shall be valid or effective for more than 90 days after such Record Date. 
  
 9.05    Notation on or Exchange of Trust Debt Securities. 
  
 Trust Debt Securities of the related series authenticated and made available for delivery after the execution of any
supplemental indenture pursuant to this Article 9 may, and shall, if required by the Trustee, bear a notation in form approved by the Trustee as to any matter provided for in such supplemental indenture. If the Company shall so determine, new Trust
Debt Securities so modified as to conform, in the opinion of the Trustee and the Board of Directors, to any such supplemental indenture may be prepared and executed by the Company and authenticated and made available for delivery by the Trustee in
exchange for outstanding Trust Debt Securities. 
  
 9.06    Trustee to Execute Supplemental Indentures. 
  
 The Trustee shall execute any supplemental indenture authorized pursuant to this Article 9 if the supplemental indenture does not adversely affect the rights, duties, liabilities or immunities of the Trustee. If it
does, the Trustee may, but need not, execute it. In executing such supplemental indenture the Trustee shall be provided with, and shall be fully protected in relying upon, an Officer’s Certificate and Opinion of Counsel stating that such
supplemental indenture is authorized or permitted by this Indenture. 
  
 9.07    Effect of Supplemental Indentures. 
  
 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 Holder of Trust Debt Securities of the related series theretofore or thereafter authenticated and made available for delivery hereunder shall be bound thereby. 
  

 39 

 ARTICLE X 
 SUBORDINATION 
  
 10.01    Applicability of Article; Trust Debt Securities Subordinated to Senior Indebtedness. 
  
 (a)    The provision of this Article 10 shall be applicable to each series of Trust Debt Securities unless the Trust Debt Securities
of such series provide otherwise. 
  
 (b)    If not otherwise provided with respect to the Trust Debt Securities of such series, then notwithstanding the provisions of Section 6.10 hereof or any other provision herein or in any Trust Debt Security, the
Company and the Trustee and, by their acceptance thereof, the Holders of the Trust Debt Securities (i) covenant and agree that all payments by the Company of the principal of and premium, if any, and interest on the Trust Debt Securities (other than
Trust Debt Securities which have been discharged pursuant to Article 8) shall be subordinated in accordance with the provisions of this Article 10 to the prior payment in full, in cash or cash equivalents, of all amounts payable on, under or in
connection with Senior Indebtedness, and (ii) acknowledge that holders of Senior Indebtedness are or shall be relying on this Article 10. 
  
 10.02    Priority and Payment of Proceeds in Certain Events; Remedies Standstill. 
  
 (a)    Upon any payment or distribution of assets or
securities of the Company, as the case may be, of any kind or character, whether in cash, property or securities, upon any dissolution or winding up or total or partial liquidation or reorganization of the Company, whether voluntary or involuntary,
or in bankruptcy, insolvency, receivership or other proceedings, all amounts payable on, under or in connection with Senior Indebtedness (including any interest accruing on such Senior Indebtedness subsequent to the commencement of a bankruptcy,
insolvency or similar proceeding) shall first be paid in full in cash, or payment provided for in cash or cash equivalents, before the Holders or the Trustee on behalf of the Holders or the holders of Preferred Trust Securities shall be entitled to
receive from the Company any payment of principal of or premium, if any, or interest on the Trust Debt Securities or distribution of any assets or securities. 
  

(b)    No direct or indirect payment by or on behalf of the Company of principal of or premium, if any, or interest on the Trust
Debt Securities (other than Trust Debt Securities which have been discharged pursuant to Article 8), whether pursuant to the terms of the Trust Debt Securities or upon acceleration or otherwise, shall be made if, any the time of such payment, there
exists (i) a default in the payment of all or any portion of any Senior Indebtedness and the Trustee has received written notice thereof from the Company, from holders of Senior Indebtedness or from any trustee, representative or agent therefor, or
(ii) any other default affecting Senior Indebtedness, as a result of which the maturity of Senior Indebtedness has been accelerated and the Trustee has received written notice from the Company, from holders of Senior Indebtedness or from any
trustee, representative or agent therefor, and such default shall not have been cured or waived by or on behalf of the holders of such Senior Indebtedness. 
  
 (c)    If, notwithstanding the foregoing provisions prohibiting such payment or distribution, the Trustee or any Holder shall have
received any payment on account of the 

  

 40 

 
principal of or premium, if any, or interest on the Trust Debt Securities when such payment is prohibited by this Section 10.02 and before all amounts
payable on, under or in connection with Senior Indebtedness are paid in full in cash or cash equivalents, then and in such event (subject to the provisions of Section 10.08 hereof) such payment or distribution shall be received and held in trust for
the holders of Senior Indebtedness and, at the written direction of the trustee, representative or agent for the holders of the Senior Indebtedness, shall be paid to the holders of the Senior Indebtedness remaining unpaid to the extent necessary to
pay such Senior Indebtedness in full in cash or cash equivalents. 
  
 Upon any payment or distribution of assets or securities referred to in this Article 10, the Trustee and the Holders shall be entitled to rely upon any order or decree of a court of competent jurisdiction in which such dissolution, winding
up, liquidation or reorganization proceedings are pending, and upon a certificate of the receiver, trustee in bankruptcy, liquidating trustee, agent or other Person making any such payment or distribution, delivered to the Trustee for the purpose of
ascertaining the Persons entitled to participate in such distribution, the holders of Senior Indebtedness of the Company, the amount thereof or payable thereon, the amount or amounts paid or distributed thereon and all other facts pertinent thereto
or to this Article 10. 
  
 10.03    Payments which May Be Made Prior to Notice. 
  
 Nothing in this Article 10 or elsewhere in this Indenture shall prevent (i) the Company, except under the conditions described in Section 10.02 hereof, from making payments of principal of or premium, if any, or
interest on the Trust Debt Securities or from depositing with the Trustee any monies for such payments, or (ii) the application by the Trustee of any monies deposited with it for the purpose of making such payments of principal of or premium, if
any, or interest on the Trust Debt Securities, to the Holders entitled thereto, unless at least one Business Day prior to the date when such payment would otherwise (except for the prohibitions contained in Section 10.02 hereof) become due and
payable the Trustee shall have received the written notice provided for in Section 10.02(b)(i) or (ii) hereof. 
  
 10.04    Rights of Holders of Senior Indebtedness Not to Be Impaired. 
  
 No right of any present or future holder of any Senior Indebtedness to
enforce subordination as herein provided shall at any time or in any way be prejudiced or impaired by any act or failure to act in good faith by any such holder, or by any noncompliance by the Company with the terms and provisions and covenants
herein regardless of any knowledge thereof any such holder may have or otherwise be charged with. 
  
 The provisions of this Article 10 are intended to be for the benefit of, and shall be enforceable directly by, the holders of Senior Indebtedness.
Notwithstanding anything to the contrary in this Article 10, to the extent any Holders or the Trustee have paid over or delivered to any holder of Senior Indebtedness any payment or distribution received on account of the principal of or premium (if
any) or interest on the Trust Debt Securities to which any other holder of Senior Indebtedness shall be entitled to share in accordance with Section 10.02 hereof, no holder of Senior Indebtedness shall have a claim or right against any Holders or
the Trustee with respect to any such payment or distribution or as a result of the failure to make payments or distributions to such other holder of Senior Indebtedness. 
  

 41 

 10.05    Trustee May Take Action to Effectuate Subordination. 
  
 Each Holder of a Trust Debt Security, by his acceptance thereof, authorizes
and directs the Trustee on his behalf to take such action as may be required by the trustee, representative or agent for holders of Senior Indebtedness or by the Company to effectuate, as between the holders of Senior Indebtedness and the Holders,
the subordination as provided in this Article 10 and appoints the Trustee his attorney-in-fact for any and all such purposes. 
  
 10.06    Subrogation. 
  
 Upon the payment in full, in cash or cash equivalents, of all Senior Indebtedness, any Holder shall be subrogated to the rights of the holders of such
Senior Indebtedness to receive payments or distributions of assets of the Company made on such Senior Indebtedness until the Trust Debt Securities shall be paid in full; and for the purposes of such subrogation, no payments or distributions to
holders of such Senior Indebtedness of any cash property or securities to which such Holders of the Trust Debt Securities would be entitled except for this Article 10, and no payment pursuant to this Article 10 to holders of such Senior Indebtedness
by such Holders of the Trust Debt Securities, shall, as between the Company, its creditors other than holders of such Senior Indebtedness and such Holders of the Trust Debt Securities, be deemed to be a payment by the Company to or on account of
such Senior Indebtedness, it being understood that the provisions of this Article 10 are solely for the purpose of defining the relative rights of the holders of such Senior Indebtedness, on the one hand, and such Holders of the Trust Debt
Securities, on the other hand. 
  
 If any payment or distribution
to which Holders of Trust Debt Securities would otherwise have been entitled but for the provisions of this Article 10 shall have been applied, pursuant to this Article 10, to the payment of all Senior Indebtedness then and in such case such Holders
of the Trust Debt Securities shall be entitled to receive from the holders of such Senior Indebtedness at the time outstanding any payments or distributions received by such holders of Senior Indebtedness in excess of the amount sufficient to pay,
in cash or cash equivalents, all such Senior Indebtedness in full. 
  
 10.07    Obligations of Company Unconditional; Reinstatement. 
  
 Nothing in this Article 10 or elsewhere in this Indenture or in any Trust Debt Security is intended to or shall impair, as between the Company and Holders
of the Trust Debt Securities, the obligations of the Company, which are absolute and unconditional, to pay to such Holders the principal of and premium, if any, and interest on the Trust Debt Securities as and when the same shall become due and
payable in accordance with their terms, or is intended to or shall affect the relative rights of such Holders of the Trust Debt Securities and creditors of the Company other than the holders of the Senior Indebtedness, nor shall anything herein or
therein prevent the Trustee or any Holder of Trust Debt Securities or holder of Preferred Trust Securities, as applicable, from exercising all remedies otherwise permitted by applicable law under this Indenture, subject to the rights, if any, under
this Article 10 of the holders of such Senior Indebtedness in respect of cash, property or securities of the Company received upon the exercise of any such remedy. 
  

 42 

 The failure to make a scheduled payment of principal of or premium, if any, or interest on the Trust Debt
Securities by reason of Section 10.02 shall not be construed as preventing the occurrence of an Event of Default under Section 6.01 hereof; provided, however, that if (i) the conditions preventing the making of such payment no longer exist, and (ii)
such Holders of the Trust Debt Securities are made whole with respect to such omitted payments, the Event of Default relating thereto (including any failure to pay any accelerated amounts) shall be automatically waived, and the provisions of the
Indenture shall be reinstated as if no such Event of Default had occurred. 
  
 10.08    Trustee Entitled to Assume Payments Not Prohibited in Absence of Notice. 
  
 The Trustee or Paying Agent shall not be charged with the knowledge of the existence of any default in the payment of all or a portion of any Senior
Indebtedness or any other default affecting Senior Indebtedness, as a result of which the maturity of the Senior Indebtedness has been accelerated, unless and until the Trustee or Paying Agent shall have received written notice thereof from the
Company or one or more holders of Senior Indebtedness or from any trustee, representative or agent therefor or unless the Trustee or Paying Agent otherwise had actual knowledge thereof; and, prior to the receipt of any such written notice or actual
knowledge of a Responsible Officer in the Corporate Trust Department of the Trustee or Paying Agent, the Trustee or Paying Agent may conclusively assume that no such facts exist. 
  
 Unless at least one Business Day prior to the date when by the terms of this Indenture any monies are to be deposited by the
Company with the Trustee or any Paying Agent for any purpose (including, without limitation, the payment of the principal of or premium, if any, or interest on any Trust Debt Security), the Trustee or Paying Agent shall have received with respect to
such monies the notice provided for in Section 10.02 or a Responsible Officer in the Corporate Trust Department of the Trustee or Paying Agent shall have actual knowledge of default in the payment of all or a portion of any Senior Indebtedness or
any other default affecting Senior Indebtedness as the result of which the maturity of the Senior Indebtedness has been accelerated, the Trustee or Paying Agent shall have full power and authority to receive and apply such monies to the purpose for
which they were received. Neither of them shall be affected by any notice to the contrary, which may be received by either on or after such date. The foregoing shall not apply to the Paying Agent if the Company is acting as Paying Agent. Nothing in
this Section 10.08 shall limit the right of the holders of Senior Indebtedness to recover payments as contemplated by Section 10.02 hereof. The Trustee or Paying Agent shall be entitled to conclusively rely on the delivery to it of a written notice
by a Person representing himself or itself to be a holder of such Senior Indebtedness (or a trustee, representative or agent on behalf of such holder) to establish that such notice has been given by a holder of such Senior Indebtedness or a trustee,
representative or agent on behalf of any such holder. The Trustee shall not be deemed to have any duty to the holders (and shall be fully protected in relying upon such notice) of Senior Indebtedness. 
  
 10.09    Right of Trustee to Hold Senior Indebtedness.

  
 The Trustee and any Paying Agent shall be entitled to all
of the rights set forth in this Article 10 in respect of any Senior Indebtedness at any time held by them to the same extent as 

  

 43 

 
any other holder of such Senior Indebtedness, and nothing in this Indenture shall be construed to deprive the Trustee or any Paying Agent of any of its
rights as such holder. 
  
 10.10    Trustee
Not Fiduciary for Holders of Senior Indebtedness. 
  
 The
Trustee shall not be deemed to owe any fiduciary duty to the holders of Senior Indebtedness and, unless otherwise provided by applicable law, shall not be liable to any such holders if the Trustee shall in good faith mistakenly pay over or
distribute to Holders of Securities or to the Company or to any other person cash, property or securities to which any holders of Senior Indebtedness shall be entitled by virtue of this Article or otherwise. With respect to the holders of Senior
Indebtedness, the Trustee undertakes to perform or to observe only such of its covenants or obligations as are specifically set forth in this Article and no implied covenants or obligations with respect to holders of Senior Indebtedness shall be
read into this Indenture against the Trustee. 
  
 ARTICLE XI

 MISCELLANEOUS 
  
 11.01    Trust Indenture Act Controls. 
  

If any provision of this Indenture limits, qualifies or conflicts with the duties imposed by operation of subsection (c) of Section 318 of the TIA, the
imposed duties shall control. The provisions of Sections 310 to 317, inclusive, of the TIA that impose duties on any Person (including provisions automatically deemed included in an indenture unless the indenture provides that such provisions are
excluded) are a part of and govern this Indenture, except as, and to the extent, they are expressly excluded from this Indenture, as permitted by the TIA. 
  
 11.02    Notices. 
  
 Any notice, request or other communication required or permitted to be given hereunder shall be in writing and delivered, telecopied or mailed by
first-class mail, postage prepaid, addressed as follows: 
  
 if to
the Company: 
  
 Southwest Gas Corporation

 5241 Spring Mountain Road 
 P.O. Box 98510 
 Las Vegas, Nevada 89193-8510 
 Facsimile No.: (702) 364-8542 
 Attention: Treasurer 
  

 44 

 if to the Trustee: 
  
 BNY Midwest Trust Company 
 2 North LaSalle Street, Suite 1020 
 Chicago, Illinois 60602 
 Facsimile No. (312) 827-8542 
 Attention: Corporate Trust Department 
  
 The Company or the Trustee, by giving notice to the other, may designate additional or different addresses for subsequent notices of communications. The
Company shall notify the holder, if any, of Senior Indebtedness of any such additional or different addresses of which the Company receives notice from the Trustee. 
  
 Any notice or communication given to a Holder shall be mailed or delivered to the Holder at the Holder’s address as it
appears on the Register of the Registrar and shall be sufficiently given if mailed within the time prescribed. 
  
 Failure to mail a notice or communication to a Holder or any defect in it shall not affect its sufficiency with respect to other Holders. If a notice or
communication is mailed in the manner provided above, it is duly given, whether or not received by the addressee. 
  
 If the Company mails a notice or communication to the Holders, it shall mail a copy to the Trustee and each Registrar, Paying Agent or co-Registrar.

  
 11.03    Communication by Holders with
Other Holders. 
  
 Holders may communicate, pursuant to TIA
Section 312(b), with other Holders with respect to their rights under this Indenture or the Trust Debt Securities. The Company, the Trustee, the Registrar, the Paying Agent and anyone else shall have the protection of TIA Section 312(c). 

 
 11.04    Certificate and Opinion as to Conditions
Precedent. 
  
 Upon any request or application by the Company
to the Trustee to take any action under this Indenture, the Company shall furnish to the Trustee: 
  
 (1)    an Officer’s Certificate (complying with Section 11.05 hereof) stating that, in the opinion of such
Officer, all conditions precedent to the taking of such action have been complied with; and 
  
 (2)    if appropriate, an Opinion of Counsel (complying with Section 11.05 hereof) stating that, in the opinion of
such counsel all such conditions precedent to the taking of such action have been complied with. 
  
 11.05    Statements Required in Certificate or Opinion. 
  
 Each Officer’s Certificate and Opinion of Counsel with respect to compliance with a covenant or condition provided for
in this Indenture shall include: 
  

 45 

 (1)    a statement that each Person making such Officer’s
Certificate or Opinion of Counsel has read such covenant or condition; 
  
 (2)    a brief statement as to the nature and scope of the examination or investigation upon which the statements or opinions contained in such Officer’s Certificate or Opinion of Counsel are
based; 
  
 (3)    a statement
that, in the opinion of each such Person, such Person has made such examination or investigation as is necessary to enable such Person to express an informed opinion as to whether or not such covenant or condition has been complied with; and

  
 (4)    a statement that,
in the opinion of such Person, such covenant or condition has been complied with; provided, however, that with respect to matters of fact not involving any legal conclusion, an Opinion of Counsel may rely on an Officer’s Certificate or
certificates of public officials. 
  
 11.06    Severability Clause. 
  
 If any provision in this Indenture or in the Trust Debt Securities shall be invalid, illegal or unenforceable, the validity, legality and enforceability of the remaining provisions shall not in any way be affected or impaired thereby.

  
 11.07    Rules by Trustee,
Paying Agent and Registrar. 
  
 The Trustee may make
reasonable rules for action by or a meeting of Holders. The Registrar and Paying Agent may make reasonable rules for their functions. 
  
 11.08    Legal Holidays. 
  
 If any specified date (including a date for giving notice) is a Legal Holiday, the action to be taken on such date shall be taken on the next succeeding
day that is not a Legal Holiday, and if such action is a payment in respect of the Trust Debt Securities, unless otherwise specified pursuant to Section 2.01 hereof no principal, premium (if any) or interest installment shall accrue for the
intervening period; except that if any interest payment is due on a Legal Holiday and the next succeeding day is in the next succeeding calendar year, such payment shall be made on the Business Day immediately preceding such Legal Holiday.

  
 11.09    Governing Law. 

 
 This Indenture and the Trust Debt Securities shall be governed by and
construed in accordance with the laws of the State of New York as applied to contracts made and performed within the State of New York, without regard to its principles of conflicts of laws. 
  
 11.10    No Recourse Against Others. 

 
 No director, officer, employee or stockholder, as such, of the Company
shall have any liability for any obligations of the Company under the Trust Debt Securities or this Indenture or 

  

 46 

 
for any claim based on, in respect of or by reason of such obligations their creation. By accepting a Trust Debt Security, each Holder shall waive and
release all such liability. The waiver and release shall be part of the consideration for the issue of the Trust Debt Securities. 
  
 11.11    Successors. 
  
 All agreements of the Company in this Indenture and Trust Debt Securities shall bind its successors and assigns. All agreements of the Trustee in this
Indenture shall bind its successors and assigns. 
  
 11.12    Multiple Original Copies of this Indenture. 
  
 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. Any signed copy shall be sufficient proof of this Indenture.

  
 11.13    No Adverse Interpretation of
Other Agreements. 
  
 This Indenture may not be used to
interpret another indenture, loan or debt agreement of the Company or any subsidiary. Any such indenture, loan or debt agreement may not be used to interpret this Indenture. 
  
 11.14    Table of Contents; Headings, Etc. 
  
 The Table of Contents, Cross-Reference Table, and headings of the Articles
and Sections of this Indenture have been inserted for convenience of reference only, are not to be considered a part hereof, and shall in no way modify or restrict any of the terms or provisions hereof. 
  
 11.15    Benefits of the Indenture. 
  
 Except as otherwise expressly provided herein with respect to holders of
Senior Indebtedness and holders of Preferred Trust Securities, nothing in this Indenture or in the Trust Debt Securities, express or implied, shall give to any person, other than the parties hereto and their successors hereunder and the Holders of
the Trust Debt Securities, any benefit or any legal or equitable right, remedy or claim under this Indenture. 
  

 47 

 SIGNATURES 
  
 IN WITNESS WHEREOF, the undersigned, being duly authorized, have executed this Indenture on behalf of the respective parties hereto as of the date first
above written. 
  

	SOUTHWEST GAS CORPORATION
		
	By:	 	                                       
                                        
                 

	 	 	 Name:
                                        
                                        
 

	 	 	 Title:
                                        
                                        
    

  
  

	BNY MIDWEST TRUST COMPANY, AS TRUSTEE
		
	By:	 	                                       
                                        
                 

	 	 	 Name:
                                        
                                        
 

	 	 	 Title:
                                        
                                        
    

  

 48 

 Exhibit A 
  

SOUTHWEST GAS CORPORATION 
              % Deferrable Interest Junior Subordinated Debenture, 
 Series II 
  
 No.
             
  
 IF THE TRUST DEBT SECURITY IS TO BE A GLOBAL TRUST DEBT SECURITY, INSERT—This Trust Debt Security is a global Trust Debt Security within the meaning of the Indenture hereinafter referred to and is registered in
the name of a Depositary or a nominee of a Depositary. This Trust Debt Security is exchangeable for global Trust Debt Securities registered in the name of a person other than the Depositary or its nominee only in the limited circumstances described
in the Indenture, and no transfer of this Trust Debt Security (other than a transfer of this Trust Debt Security as a whole by the Depositary to a nominee of the Depositary or by a nominee of the Depositary to the Depositary or another nominee of
the Depositary) may be registered except in limited circumstances. Every Trust Debt Security delivered upon registration of transfer of, or in exchange for, or in lieu of, this global Trust Debt Security shall be a global Trust Debt Security,
subject to the foregoing, except in the limited circumstances described above. 
  
 Unless this certificate is presented by an authorized representative of The Depository Trust Company, a New York corporation (“DTC”), to the issuer 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 requested by an authorized representative of DTC (or to such other entity 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 ANY PERSON IS WRONGFUL inasmuch as the registered owner hereof,
Cede & Co., has an interest herein.) 
  
 Southwest Gas
Corporation, a California corporation (the “Company”, which term includes any successor company under the Indenture hereinafter referred to), for value received, hereby promises to pay to
                     or registered assigns, the principal sum of
             Dollars on             ,
            , and to pay interest on said principal sum from             ,
             or from the most recent Interest Payment Date (as defined below) to which interest has been paid or duly provided for,
             in arrears on             ,
            ,             and             ,
commencing            , 200_ (each, an “Interest Payment Date”) at a rate equal to              until the
principal hereof shall have become due and payable, and on any overdue principal and (to the extent that payment of such interest is enforceable under applicable law) on any overdue installment of interest at the same rate per annum. In the event
that any Interest Payment Date is not a Business Day, then interest will be payable on the next succeeding day which is a Business Day (and without any interest or other payment in respect of any such delay), except that, if such Business Day is in
the next succeeding calendar year, such payment shall be made on the immediately preceding Business Day, in each case with the same force and effect as if made on such date. The interest installment so payable, and punctually paid or duly provided
for, on any Interest Payment Date will, as provided in the Indenture, be paid to the 

  

 A-1 

 Person in whose name this Trust Debt Security is registered at the close of business on the Regular Record Date for such
interest installment, which shall be the              day (whether or not a Business Day) preceding the applicable Interest Payment Date, provided that if all of the Series II Trust Debt
Securities (as defined below) are then held by Southwest Gas Capital II (the “Trust”) or the Series II Trust Debt Securities are held in book-entry-only form, the Regular Record Date shall be the close of business on the Business Day next
preceding such Interest Payment Date. Any such interest installment not punctually paid or duly provided for shall forthwith cease to be payable to the Holder on such Regular Record Date, and may be paid to the Person in whose name this Trust Debt
Security is registered at the close of business on a Special Record Date to be fixed by the Trustee (as defined below) for the payment of such defaulted interest, notice whereof shall be given to the Holders of the Series II Trust Debt Securities
not less than 7 days prior to such Special Record Date, as more fully provided in the Indenture. 
  
 Payment of the principal of, premium, if any, and interest on this Trust Debt Security will be made in such coin or currency of the United States of
America as at the time of payment is legal tender for payment of public and private debts. Payments of interest on an Interest Payment Date will be made by check mailed to the Holder hereof at the address shown in the Register or, at the option of
the Holder hereof, to such other place in the United States of America as the Holder hereof shall designate to the Trustee in writing. At the request of a Holder of at least $10,000,000 aggregate principal amount of Series II Trust Debt Securities,
interest on such Trust Debt Securities will be payable by wire transfer within the continental United States in immediately available funds to the bank account number specified in writing by such Holder to the Registrar prior to the Regular Record
Date. 
  
 The principal and any premium and interest due hereon on
the Stated Maturity Date or a Redemption Date (other than an Interest Payment Date) will be paid in immediately available funds only upon surrender of this Trust Debt Security at the principal corporate office of BNY Midwest Trust Company, Paying
Agent, in Chicago, Illinois, or at such other office or agency of the Paying Agent as the Company shall designate by written notice to the Holder of this Trust Debt Security. 
  
 The indebtedness evidenced by this Trust Debt Security is, to the extent provided in the Indenture, subordinate and subject
in right of payment to the prior payment in full of all Senior Indebtedness, and this Trust Debt Security is issued subject to the provisions of the Indenture with respect thereto. The Holder of this Trust Debt Security, by accepting the same, (a)
agrees to and shall be bound by such provisions, (b) authorizes and directs the Trustee on his behalf to take such action as may be necessary or appropriate to acknowledge or effectuate the subordination so provided and (c) appoints the Trustee his
attorney-in-fact for any and all such purposes. The Holder of this Trust Debt Security, by his acceptance hereof, hereby waives all notice of the acceptance of the subordination provisions contained herein and in the Indenture by each holder of
Senior Indebtedness, whether now outstanding or hereafter incurred, and waives reliance by each such holder upon said provisions. 
  
 This Trust Debt Security is one of a duly authorized series of Trust Debt Securities of the Company (herein sometimes referred to as the “Series
             Trust Debt Securities”), specified in the Indenture, limited in aggregate principal amount to $             ,
issued under and pursuant to an Indenture dated as of             , 2003 (the “Indenture”) executed and delivered 
  

 A-2 

 between the Company and BNY Midwest Trust Company, as trustee (the “Trustee”). The Series II Trust Debt
Securities are initially being issued to the Trust, to be held on behalf of the Trust by its property trustee (the “Property Trustee”). Concurrently with the issuance of the Series II Trust Debt Securities, the Trust is issuing its trust
securities, representing undivided beneficial interests in the assets of the Trust and having an aggregate liquidation amount equal to the principal amount of the Series II Trust Debt Securities, including the Trust’s
             Preferred Trust Securities, (the “Preferred Trust Securities”). By the terms of the Indenture, Trust Debt Securities are issuable in series which may vary as to
amount, date of maturity, rate of interest and in other respects as in the Indenture provided. Reference is made to the Indenture for a description of the rights, limitations of rights, obligations, duties and immunities thereunder of the Trustee,
the Company and Holders of the Trust Debt Securities. Each term used in this Trust Debt Security which is defined in the Indenture and not defined herein shall have the meaning assigned to it in the Indenture. 
  
 At the option of the Company, the Series
             Trust Debt Securities are redeemable prior to maturity (i) at any time on or after             ,
20            , in whole or in part, and (ii) if a Special Event shall occur and be continuing, in whole (but not in part), at a price equal to
             plus accrued interest to the Redemption Date. A “Special Event” means either a “Tax Event” or an “Investment Company Event”, as the case may be.
“Tax Event” means that the Company shall have received an opinion of independent tax counsel (which may be regular counsel to the Company or an Affiliate, but not an employee thereof and which must be acceptable to the Property Trustee of
the Trust) experienced in such matters to the effect that, as a result of any amendment to, or change (including any announced prospective change) in, the laws (or any regulations thereunder) of the United States or any political subdivision or
taxing authority thereof or therein affecting taxation, or as a result of any official administrative pronouncement or judicial decision interpreting or applying such laws or regulations, which amendment or change is effective or such interpretation
or pronouncement is announced on or after the date of original issuance of Preferred Trust Securities, there is more than an insubstantial risk that (i) the Trust is, or will be within 90 days of the date of such opinion, subject to United States
Federal income tax with respect to interest received or accrued on the Trust Debt Securities, (ii) interest payable by the Company to the Trust on the Series II Trust Debt Securities is not, or within 90 days of the date thereof will not be,
deductible by the Company, in whole or in part, for United States Federal income tax purposes or (iii) the Trust is, or will be within 90 days of the date thereof, subject to more than a de minimis amount of other taxes, duties, assessments or other
governmental charges. “Investment Company Event” means that the Company shall have received an opinion of independent counsel (which may be regular counsel to the Company or an Affiliate, but not an employee thereof and which must be
acceptable to the Property Trustee of the Trust) experienced in such matters to the effect that, as a result of the occurrence of any amendment to, or change (including any announced prospective change) in, the laws (or any regulations thereunder)
of the United States or any political subdivision or securities authority thereof or therein affecting regulation of investment companies, or as a result of any official administrative pronouncement or judicial decision interpreting or applying such
laws or regulations, which amendment or change is effective or such interpretation or pronouncement is announced on or after the date of original issuance of Preferred Trust Securities, there is more than an insubstantial risk that the Trust is or
will be considered an “investment company” that is required to be registered under the Investment Company Act of 1940, as amended. 
  

 A-3 

 At least 30 days but not more than 60 days before the Redemption Date, the Trustee shall mail or cause to
be mailed a notice of redemption by first-class mail, postage prepaid, to each Holder of Series II Trust Debt Securities to be redeemed. 
  
 In the event of redemption of this Trust Debt Security in part only, a new Series II Trust Debt Security or Trust Debt Securities for the unredeemed
portion hereof will be issued in the name of the Holder hereof upon the cancellation hereof. 
  
 In case an Event of Default with respect to the Series II Trust Debt Securities occurs and is continuing, the principal of and premium, if any, and interest on the Series II Trust Debt Securities may (and, in certain
circumstances, shall) be declared, and upon such declaration shall become, due and payable, in the manner, with the effect and subject to the conditions provided in the Indenture. 
  
 The Indenture contains provisions for defeasance at any time of the entire indebtedness of this Trust Debt Security upon
compliance by the Company with certain conditions set forth therein. 
  
 Subject to certain exceptions in the Indenture which require the consent of every Holder, the Company and the Trustee may amend the Indenture or may waive future compliance by the Company with any provisions of the Indenture, with the
consent of the Holders of at least a majority in aggregate principal amount of the Trust Debt Securities of each series affected thereby, provided that if the Series II Trust Debt Securities are held by the Trust, no such amendment or waiver that
adversely affects the holders of the Preferred Trust Securities shall be effective without the prior consent of the holders of at least a majority in aggregate liquidation amount of the outstanding Preferred Trust Securities. Subject to certain
exceptions in the Indenture, without the consent of any Holder, the Company and the Trustee may amend the Indenture to cure any ambiguity, defect or inconsistency, to bind a successor to the obligations of the Indenture, to provide for
uncertificated Trust Debt Securities in addition to certificated Trust Debt Securities, to comply with any requirements of the Trust Debt Securities and the Securities and Exchange Commission in connection with the qualification of the Indenture
under the TIA, or to make any change that, in the reasonable judgment of the Company, does not adversely affect the rights of any Holder. Amendments bind all Holders and subsequent Holders. 
  
 No reference herein to the Indenture and no provision of this Trust Debt
Security or the Indenture shall alter or impair the obligation of the Company, which is absolute and unconditional, to pay the principal of and premium, if any, and interest on this Trust Debt Security at the time and place and at the rate and in
the money herein prescribed. 
  
 So long as no Event of Default
with respect to the Series II Trust Debt Securities has occurred and is continuing, the Company shall have the right at any time and from time to time to extend the interest payment period of the Series II Trust Debt Securities for up to
             consecutive periods (the “Extension Period”), provided that no Extension Period shall extend beyond the Stated Maturity Date or Redemption Date of any Series II Trust
Debt Security. At the end of the Extension Period, the Company shall pay all interest then accrued and unpaid (together with interest thereon at the rate specified for the Series II Trust Debt Securities, compounded
            , to the extent that payment of such interest is enforceable under 
  

 A-4 

 
applicable law). Prior to the termination of any such Extension Period, the Company may further extend such Extension Period, provided that such Extension
Period, together with all such previous and further extensions, shall not exceed              consecutive periods and shall not extend beyond the Stated Maturity Date or Redemption Date of
any Series II Trust Debt Security. At the termination of any such Extension Period and upon the payment of all amounts then due, the Company may elect to begin a new Extension Period, subject to the foregoing restrictions. 
  
 Series II Trust Debt Securities are issuable only in registered form without
coupons in denominations of $             and any integral multiple thereof. As provided in the Indenture and subject to certain limitations therein set forth, this Trust Debt Security is
exchangeable for a like aggregate principal amount of Series II Trust Debt Securities of a different authorized denomination, as requested by the Holder surrendering the same. 
  
 As provided in the Indenture and subject to certain limitations therein set forth, this Trust Debt Security is transferable
by the Holder hereof upon surrender of this Trust Debt Security for registration of transfer at the office or agency of the Registrar accompanied by a written instrument or instruments of transfer in form satisfactory to the Registrar duly executed
by the Holder hereof or his attorney duly authorized in writing, and thereupon one or more new Series II Trust Debt Securities of authorized denominations and for the same aggregate principal amount will be issued to the designated transferee or
transferees. No service charge will be made for any such transfer, but the Company may require payment of a sum sufficient to cover any tax or other governmental charge payable in relation thereto. 
  
 Prior to presentment for registration of transfer of this Trust Debt
Security, the Company, the Trustee, any Paying Agent and any Registrar may deem and treat the Holder hereof as the absolute owner hereof (whether or not this Trust Debt Security shall be overdue and notwithstanding any notice of ownership or writing
hereon made by anyone other than the Registrar) for the purpose of receiving payment of or on account of the principal hereof and premium, if any, and interest due hereon and for all other purposes, and neither the Company nor the Trustee nor any
Paying Agent nor any Registrar shall be affected by any notice to the contrary. 
  
 No recourse shall be had for the payment of the principal of or the interest on this Trust Debt Security, or for any claim based hereon, or otherwise in respect hereof, or based on or in respect of the Indenture,
against any incorporator, shareholder, officer or director, past, present or future, as such, of the Company or of any predecessor or successor corporation, whether by virtue of any constitution, statute or rule of law, or by the enforcement of any
assessment or penalty or otherwise, all such liability being, by the acceptance hereof and as part of the consideration for the issuance hereof, expressly waived and released. 
  
 This Trust Debt Security shall not be valid until an authorized signatory of the Trustee manually signs and dates the
Trustee’s Certificate of Authentication below. 
  

 A-5 

 IN WITNESS WHEREOF, the Company has caused this Trust Debt Security to be signed manually or by facsimile
by its duly authorized officers and a facsimile of its corporate seal to be affixed hereto or imprinted hereon. 
  

	 	 	 	 	 SOUTHWEST GAS CORPORATION 

					
	[SEAL]	 	 	 	 	 	By:	 	                                      
                                        
               
	 	 	 	 	 	 	 	 	Name:
                                        
                                      
 
	 	 	 	 	 	 	 	 	 Title:                                     
                                        
      

  
  

	Attest:
		
	 	 	                                      
                                        
      
	 	 	 (Assistant) Secretary

  
  
 TRUSTEE’S CERTIFICATE OF AUTHENTICATION 
  
 This is one of the Trust Debt Securities, of the series designated, referred to in the within-mentioned Indenture. 
  

	BNY MIDWEST TRUST COMPANY, as Trustee
		
	By:	 	                                      
                                        
             
	 	 	 Authorized Signatory
  

	 Dated:
	 	                                      
                                        
             

  

 A-6 

 ASSIGNMENT FORM 
  

To assign this Trust Debt Security, fill in the form below: (I) or (we) assign and transfer this Trust Debt Security to: 
  

 (Insert assignee’s
social security or tax I.D. number) 
  

 (Print or type assignee’s name, address and zip code) 
  
 and irrevocably appoint              agent to transfer this Trust Debt Security on the books of the Register. The agent may substitute another to act for
him. 
  

	 	 	 	 	 
					
	Dated:	 	 	 	 	 	Signature:	 	 
	 	
	 	 	 	 	

	 	 	 	 	 	 	 (Sign exactly as your name appears on the other side of this Trust Debt Security)

  

	 
		
	Signature Guaranty:	 	 
	 	

	 	 	 

 Signatures must be guaranteed by an “eligible guarantor institution” meeting the requirements of the
Trustee, which requirements include membership or participation in the Security Transfer Agent Medallion Program (“STAMP:) or such other “signature guarantee program” as may be determined by the Trustee in addition to, or in
substitution for, STAMP, all in accordance with the Securities Exchange Act of 1934, as amended. 
  

 A-7EXHIBIT 10.4

NUMBER                                                                SHARES
SHARES

01007

                          CORPORATE ROADSHOW.COM, INC.
              Incorporated Under the Laws of the State of New York

                                                             See Reverse for
                                                           Certain Definitions

                                  Common Stock
                                                       CUSIP   22003E    10    0

THIS CERTIFIES THAT:

IS THE OWNER OF

FULLY PAID AND NON-ASSESSABLE SHARES OF COMMON STOCK OF $.001 PAR VALUE EACH OF

                          CORPORATE ROADSHOW.COM, INC.

transferable on the books of the Corporation in person or by attorney upon
surrender of this certificate duly endorsed or assigned. This certificate and
the shares represented hereby are subject to the laws of the State of New York,
and to the Articles of Incorporation and By-laws of the Corporation, as now or
hereafter amended. This certificate is not valid until countersigned by the
Transfer Agent.

                     WITNESS the facsimile seal of the Corporation and the
facsimile signatures of its duly authorized officers.

Dated:                                                            Countersigned:
                                          Olde Monmouth Stock Transfer Co., Inc.
                             201 Memorial Parkway, Atlantic Highlands, NJ  07716
                                                                  Transfer Agent

                                          By:
                                                            Authorized Signature
                                    CORPORATE
                                     (SEAL)
                                      1999
Secretary                                                   President

<PAGE>

           The following abbreviations, when used in the inscription on the face
of this certificate, shall be construed as though they were written out in full
according to applicable laws or regulations:

TEN COM - as tenants in common UNIF GIFT MIN ACT -........Custodian.............
TEN ENT - as tenants by the entireties              (Cust)           (Minor)
JT TEN  - as joint tenants                         under Uniform Gifts to Minors
          with right of                                    Act.......
          survivorship and not as tenants                    (State)
          in common

     Additional abbreviations may also be used though not in the above list.

   For Value Received, _________________ hereby sell, assign and transfer unto

Please insert social security or other
    identifying number of assignee

    -----------------------------

--------------------------------------------------------------------------------
  (please print or typewrite name and address, including zip code, of assignee)

--------------------------------------------------------------------------------

--------------------------------------------------------------------------------

--------------------------------------------------------------------------Shares
of the stock represented by the within Certificate, and do hereby irrevocably
constitute and appoint

------------------------------------------------------------------------Attorney
to transfer the said stock on the books of the within named Corporation with
full power of substitution in the premises.

Dated _______________________

                              -----------------------------------------------
                              NOTICE: The signature to this assignment must
                              correspond with the name as written upon the face
                              of the certificate in every particular, without
                              alteration or enlargement or any change
                              whatsoever.

THE SIGNATURE TO THE ASSIGNMENT MUST CORRESPOND TO THE NAME AS WRITTEN UPON THE
FACE OF THIS CERTIFICATE IN EVERY PARTICULAR, WITHOUT ALTERATION OR ENLARGEMENT
OR ANY CHANGE WHATSOEVER, AND MUST BE GUARANTEED BY A COMMERCIAL BANK OR TRUST
COMPANY OR A MEMBER FIRM OF A NATIONAL OR REGIONAL OR OTHER RECOGNIZED STOCK
EXCHANGE IN CONFORMANCE WITH A SIGNATURE GUARANTEE MEDALLION PROGRAM.

--------------------------------------------------------------------------------
Stock Market Information                       Columbia Financial Printing Co.,
                                              P.O. Box 210, Bethpage, NY  11714

<PAGE>

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