Indenture, dated as of July 5, 2012



 Exhibit 4.1 
 GEVO, INC. 
 SENIOR DEBT SECURITIES 

INDENTURE 

Dated as of July 5, 2012 
 WELLS FARGO BANK, NATIONAL ASSOCIATION 
 as Trustee 







 TABLE OF CONTENTS 

 

					
	 	  	Page	 
		
	 ARTICLE 1 DEFINITIONS
	  	 	1	  
		
	 SECTION 1.01 DEFINITIONS OF TERMS.
	  	 	1	  
		
	 ARTICLE 2 ISSUE, DESCRIPTION, TERMS, EXECUTION, REGISTRATION AND EXCHANGE OF SECURITIES
	  	 	4	  
		
	 SECTION 2.01 DESIGNATION AND TERMS OF
SECURITIES.
	  	 	4	  
	 SECTION 2.02 FORM OF SECURITIES AND
TRUSTEE’S CERTIFICATE.
	  	 	5	  
	 SECTION 2.03 DENOMINATIONS: PROVISIONS FOR
PAYMENT.
	  	 	6	  
	 SECTION 2.04 EXECUTION AND AUTHENTICATIONS.
	  	 	7	  
	 SECTION 2.05 REGISTRATION OF TRANSFER AND
EXCHANGE.
	  	 	7	  
	 SECTION 2.06 TEMPORARY SECURITIES.
	  	 	8	  
	 SECTION 2.07 MUTILATED, DESTROYED, LOST OR
STOLEN SECURITIES.
	  	 	8	  
	 SECTION 2.08 CANCELLATION.
	  	 	9	  
	 SECTION 2.09 BENEFITS OF INDENTURE.
	  	 	9	  
	 SECTION 2.10 AUTHENTICATING AGENT.
	  	 	9	  
	 SECTION 2.11 GLOBAL SECURITIES.
	  	 	10	  
		
	 ARTICLE 3 REDEMPTION OF SECURITIES AND SINKING FUND PROVISIONS
	  	 	10	  
		
	 SECTION 3.01 REDEMPTION.
	  	 	10	  
	 SECTION 3.02 NOTICE OF REDEMPTION.
	  	 	11	  
	 SECTION 3.03 PAYMENT UPON REDEMPTION.
	  	 	11	  
	 SECTION 3.04 SINKING FUND.
	  	 	12	  
	 SECTION 3.05 SATISFACTION OF SINKING FUND
PAYMENTS WITH SECURITIES.
	  	 	12	  
	 SECTION 3.06 REDEMPTION OF SECURITIES FOR
SINKING FUND.
	  	 	12	  
		
	 ARTICLE 4 COVENANTS
	  	 	12	  
		
	 SECTION 4.01 PAYMENT OF PRINCIPAL, PREMIUM
AND INTEREST.
	  	 	12	  
	 SECTION 4.02 MAINTENANCE OF OFFICE OR
AGENCY.
	  	 	13	  
	 SECTION 4.03 PAYING AGENTS.
	  	 	13	  
	 SECTION 4.04 APPOINTMENT TO FILL VACANCY
IN OFFICE OF TRUSTEE.
	  	 	14	  
	 SECTION 4.05 COMPLIANCE WITH CONSOLIDATION
PROVISIONS.
	  	 	14	  
		
	 ARTICLE 5 SECURITYHOLDERS’ LISTS AND REPORTS BY THE COMPANY AND THE TRUSTEE
	  	 	14	  
		
	 SECTION 5.01 COMPANY TO FURNISH TRUSTEE
NAMES AND ADDRESSES OF SECURITYHOLDERS.
	  	 	14	  
	 SECTION 5.02 PRESERVATION OF INFORMATION;
COMMUNICATIONS WITH SECURITYHOLDERS.
	  	 	14	  
	 SECTION 5.03 REPORTS BY THE COMPANY.
	  	 	15	  
	 SECTION 5.04 REPORTS BY THE TRUSTEE.
	  	 	15	  
		
	 ARTICLE 6 REMEDIES OF THE TRUSTEE AND SECURITYHOLDERS ON EVENT OF DEFAULT
	  	 	15	  
		
	 SECTION 6.01 EVENTS OF DEFAULT.
	  	 	15	  
	 SECTION 6.02 COLLECTION OF INDEBTEDNESS AND
SUITS FOR ENFORCEMENT BY TRUSTEE.
	  	 	17	  
	 SECTION 6.03 APPLICATION OF MONEYS
COLLECTED.
	  	 	18	  
	 SECTION 6.04 LIMITATION ON SUITS.
	  	 	18	  
	 SECTION 6.05 RIGHTS AND REMEDIES CUMULATIVE;
DELAY OR OMISSION NOT WAIVER.
	  	 	19	  
	 SECTION 6.06 CONTROL BY SECURITYHOLDERS.
	  	 	19	  
	 SECTION 6.07 UNDERTAKING TO PAY COSTS.
	  	 	19	  
		
	 ARTICLE 7 CONCERNING THE TRUSTEE
	  	 	20	  
		
	 SECTION 7.01 CERTAIN DUTIES AND RESPONSIBILITIES
OF TRUSTEE.
	  	 	20	  
	 SECTION 7.02 CERTAIN RIGHTS OF
TRUSTEE.
	  	 	20	  
	 SECTION 7.03 TRUSTEE NOT RESPONSIBLE FOR
RECITALS OR ISSUANCE OR SECURITIES.
	  	 	22	  
	 SECTION 7.04 MAY HOLD SECURITIES.
	  	 	22	  


  
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 TABLE OF CONTENTS 

(continued) 
  


					
	 	  	Page	 
		
	 SECTION 7.05 MONEYS HELD IN TRUST.
	  	 	22	  
	 SECTION 7.06 COMPENSATION AND REIMBURSEMENT.
	  	 	22	  
	 SECTION 7.07 RELIANCE ON OFFICERS’
CERTIFICATE.
	  	 	23	  
	 SECTION 7.08 DISQUALIFICATION; CONFLICTING INTERESTS.
	  	 	23	  
	 SECTION 7.09 CORPORATE TRUSTEE REQUIRED;
ELIGIBILITY.
	  	 	23	  
	 SECTION 7.10 RESIGNATION AND REMOVAL; APPOINTMENT
OF SUCCESSOR.
	  	 	23	  
	 SECTION 7.11 ACCEPTANCE OF APPOINTMENT BY
SUCCESSOR.
	  	 	24	  
	 SECTION 7.12 MERGER, CONVERSION, CONSOLIDATION OR
SUCCESSION TO BUSINESS.
	  	 	25	  
	 SECTION 7.13 PREFERENTIAL COLLECTION OF CLAIMS
AGAINST THE COMPANY.
	  	 	25	  
	 SECTION 7.14 NOTICE OF DEFAULT
	  	 	25	  
		
	 ARTICLE 8 CONCERNING THE SECURITYHOLDERS
	  	 	26	  
		
	 SECTION 8.01 EVIDENCE OF ACTION BY
SECURITYHOLDERS.
	  	 	26	  
	 SECTION 8.02 PROOF OF EXECUTION BY
SECURITYHOLDERS.
	  	 	26	  
	 SECTION 8.03 WHO MAY BE DEEMED
OWNERS.
	  	 	26	  
	 SECTION 8.04 CERTAIN SECURITIES OWNED BY
COMPANY DISREGARDED.
	  	 	27	  
	 SECTION 8.05 ACTIONS BINDING ON FUTURE
SECURITYHOLDERS.
	  	 	27	  
		
	 ARTICLE 9 SUPPLEMENTAL INDENTURES
	  	 	27	  
		
	 SECTION 9.01 SUPPLEMENTAL INDENTURES WITHOUT THE
CONSENT OF SECURITYHOLDERS.
	  	 	27	  
	 SECTION 9.02 SUPPLEMENTAL INDENTURES WITH CONSENT
OF SECURITYHOLDERS.
	  	 	28	  
	 SECTION 9.03 EFFECT OF SUPPLEMENTAL
INDENTURES.
	  	 	29	  
	 SECTION 9.04 SECURITIES AFFECTED BY SUPPLEMENTAL
INDENTURES.
	  	 	29	  
	 SECTION 9.05 EXECUTION OF SUPPLEMENTAL
INDENTURES.
	  	 	29	  
		
	 ARTICLE 10 SUCCESSOR ENTITY
	  	 	30	  
		
	 SECTION 10.01 COMPANY MAY CONSOLIDATE,
ETC.
	  	 	30	  
	 SECTION 10.02 SUCCESSOR ENTITY SUBSTITUTED.
	  	 	30	  
	 SECTION 10.03 EVIDENCE OF CONSOLIDATION, ETC.
TO TRUSTEE.
	  	 	30	  
		
	 ARTICLE 11 SATISFACTION AND DISCHARGE
	  	 	31	  
		
	 SECTION 11.01 SATISFACTION AND DISCHARGE OF
INDENTURE.
	  	 	31	  
	 SECTION 11.02 DISCHARGE OF OBLIGATIONS.
	  	 	31	  
	 SECTION 11.03 DEPOSITED MONEYS TO BE
HELD IN TRUST.
	  	 	31	  
	 SECTION 11.04 PAYMENT OF MONEYS HELD BY
PAYING AGENTS.
	  	 	31	  
	 SECTION 11.05 REPAYMENT TO COMPANY.
	  	 	32	  
		
	 ARTICLE 12 IMMUNITY OF INCORPORATORS, STOCKHOLDERS, OFFICERS AND DIRECTORS
	  	 	32	  
		
	 SECTION 12.01 NO RECOURSE.
	  	 	32	  
		
	 ARTICLE 13 MISCELLANEOUS PROVISIONS
	  	 	32	  
		
	 SECTION 13.01 EFFECT ON SUCCESSORS AND
ASSIGNS.
	  	 	32	  
	 SECTION 13.02 ACTIONS BY SUCCESSOR.
	  	 	32	  
	 SECTION 13.03 SURRENDER OF COMPANY
POWERS.
	  	 	33	  
	 SECTION 13.04 NOTICES.
	  	 	33	  
	 SECTION 13.05 GOVERNING LAW.
	  	 	33	  
	 SECTION 13.06 TREATMENT OF SECURITIES AS
DEBT.
	  	 	33	  
	 SECTION 13.07 CERTIFICATES AND OPINIONS AS
TO CONDITIONS PRECEDENT.
	  	 	33	  
	 SECTION 13.08 PAYMENTS ON BUSINESS
DAYS.
	  	 	33	  
	 SECTION 13.09 CONFLICT WITH TRUST INDENTURE
ACT.
	  	 	34	  
	 SECTION 13.10 COUNTERPARTS.
	  	 	34	  
	 SECTION 13.11 SEPARABILITY.
	  	 	34	  


  
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 TABLE OF CONTENTS 

(continued) 
  


					
	 	  	Page	 
		
	 SECTION 13.12 COMPLIANCE CERTIFICATES.
	  	 	34	  
	 SECTION 13.13 U.S.A. PATRIOT ACT.
	  	 	34	  
	 SECTION 13.14 FORCE MAJEURE.
	  	 	34	  


  
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 INDENTURE 
 INDENTURE, dated as of July 5, 2012, between GEVO, INC., a Delaware corporation (the “Company”), and WELLS FARGO BANK, NATIONAL ASSOCIATION, as trustee (the
“Trustee”): 
 WHEREAS, for its lawful corporate purposes, the Company has duly authorized the execution and
delivery of this Indenture to provide for the issuance of debt securities (hereinafter referred to as the “Securities”), in an unlimited aggregate principal amount to be issued from time to time in one or more series as in this Indenture
provided, as registered Securities without coupons, to be authenticated by the certificate of the Trustee; 
 WHEREAS, to
provide the terms and conditions upon which the Securities are to be authenticated, issued and delivered, the Company has duly authorized the execution of this Indenture; and 
 WHEREAS, all things necessary to make this Indenture a valid agreement of the Company, in accordance with its terms, have been done. 

NOW, THEREFORE, in consideration of the premises and the purchase of the Securities by the holders thereof, it is mutually
covenanted and agreed as follows for the equal and ratable benefit of the holders of Securities: 
 ARTICLE 1 

DEFINITIONS 
 Section 1.01 Definitions of Terms. 
 The terms defined in this Section
(except as in this Indenture or any indenture supplemental hereto otherwise expressly provided or unless the context otherwise requires) for all purposes of this Indenture and of any indenture supplemental hereto shall have the respective meanings
specified in this Section and shall include the plural as well as the singular. All other terms used in this Indenture that are defined in the Trust Indenture Act of 1939, as amended, or that are by reference in such Act defined in the
Securities Act of 1933, as amended (except as herein or any indenture supplemental hereto otherwise expressly provided or unless the context otherwise requires), shall have the meanings assigned to such terms in said Trust Indenture Act and in
said Securities Act as in force at the date of the execution of this instrument. 
 “Authenticating
Agent” means an authenticating agent with respect to all or any of the series of Securities appointed by the Trustee pursuant to Section 2.10. 
 “Bankruptcy Law” means Title 11, U.S. 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 duly authorized committee of such Board.

 “Board Resolution” means a copy of a resolution certified by the Secretary or an Assistant Secretary
of the Company to have been duly adopted by the Board of Directors and to be in full force and effect on the date of such certification. 
 “Business Day” means, with respect to any series of Securities, any day other than a day on which federal or state banking institutions in the Borough of Manhattan, the City of New
York, or in the city of the Corporate Trust Office of the Trustee, are authorized or obligated by law, executive order or regulation to close. 
 “Certificate” means a certificate signed by any Officer. The Certificate need not comply with the provisions of Section 13.07. 

“Company” means Gevo, Inc., a corporation duly organized and existing under the laws of the State of Delaware,
and, subject to the provisions of Article Ten, shall also include its successors and assigns. 

  
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 “Corporate Trust Office” means the office of the Trustee at which,
at any particular time, its corporate trust business shall be principally administered, which office at the date hereof is located at 707 Wilshire Blvd., 17th Flr., MAC# E2818-176, Los Angeles, CA 90017, Attn: Administrator for Gevo, Inc. with
respect to presentation of notes or for registration of transfer or exchange of notes, 608 2nd Ave., S. Minneapolis, MN 55479, Attn: Bondholder Communications. 
 “Custodian” means any receiver, trustee, assignee, liquidator or similar official under any Bankruptcy Law. 

“Default” means any event, act or condition that with notice or lapse of time, or both, would constitute an Event
of Default. 
 “Depositary” means, with respect to Securities of any series for which the Company shall
determine that such Securities will be issued as a Global Security, The Depository Trust Company, New York, New York, another clearing agency, or any successor registered as a clearing agency under the Securities and Exchange Act of 1934, as
amended (the “Exchange Act”), or other applicable statute or regulation, which, in each case, shall be designated by the Company pursuant to either Section 2.01 or 2.11. 

“Defaulted Interest” has the meaning set forth in Section 2.03. 

“Event of Default” means, with respect to Securities of a particular series, any event specified in
Section 6.01, continued for the period of time, if any, therein designated. 
 “Global Security”
means, with respect to any series of Securities, a Security executed by the Company and delivered by the Trustee to the Depositary or pursuant to the Depositary’s instruction, all in accordance with the Indenture, which shall be registered in
the name of the Depositary or its nominee. 
 “Governmental Obligations” means securities that are
(a) direct obligations of the United States of America for the payment of which its full faith and credit is pledged or (b) obligations of a Person controlled or supervised by and acting as an agency or instrumentality of the United States
of America, the payment of which is unconditionally guaranteed as a full faith and credit obligation by the United States of America that, in either case, are not callable or redeemable at the option of the issuer thereof at any time prior to the
stated maturity of the Securities, and shall also include a depositary receipt issued by a bank or trust company as custodian with respect to any such Governmental Obligation or a specific payment of principal of or interest on any such Governmental
Obligation held by such custodian for the account of the holder of such depositary receipt; provided, however, that (except as required by law) such custodian is not authorized to make any deduction from the amount payable to the holder of such
depositary receipt from any amount received by the custodian in respect of the Governmental Obligation or the specific payment of principal of or interest on the Governmental Obligation evidenced by such depositary receipt. 

“herein”, “hereof” and “hereunder”, and other words of similar
import, refer to this Indenture as a whole and not to any particular Article, Section or other subdivision. 

“Indenture” means this instrument as originally executed or as it may from time to time be supplemented or
amended by one or more indentures supplemental hereto entered into in accordance with the terms hereof. 
 “Interest
Payment Date”, when used with respect to any installment of interest on a Security of a particular series, means the date specified in such Security or in a Board Resolution or in an indenture supplemental hereto with respect to such
series as the fixed date on which an installment of interest with respect to Securities of that series is due and payable. 

“Officer” means, with respect to the Company, the chairman of the Board of Directors, a chief executive officer,
a president, a chief financial officer, a chief operating officer, any executive vice president, any senior vice president, any vice president, the treasurer or any assistant treasurer, the controller or any assistant controller or the secretary or
any assistant secretary. 

  
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 “Officers’ Certificate” means a certificate signed by any two
Officers. Each such certificate shall include the statements provided for in Section 13.07, if and to the extent required by the provisions thereof. 
 “Opinion of Counsel” means an opinion in writing subject to customary exceptions of legal counsel, who may be an employee of or counsel for the Company, that is delivered to the
Trustee in accordance with the terms hereof. Each such opinion shall include the statements provided for in Section 13.07, if and to the extent required by the provisions thereof. 

“Outstanding”, when used with reference to Securities of any series, means, subject to the provisions of
Section 8.04, as of any particular time, all Securities of that series theretofore authenticated and delivered by the Trustee under this Indenture, except (a) Securities theretofore canceled by the Trustee or any paying agent, or delivered
to the Trustee or any paying agent for cancellation or that have previously been canceled; (b) Securities or portions thereof for the payment or redemption of which moneys or Governmental Obligations in the necessary amount shall have been
deposited in trust with the Trustee or with any paying agent (other than the Company) or shall have been set aside and segregated in trust by the Company (if the Company shall act as its own paying agent); provided, however, that if such Securities
or portions of such Securities are to be redeemed prior to the maturity thereof, notice of such redemption shall have been given as in Article Three provided, or provision satisfactory to the Trustee shall have been made for giving such notice; and
(c) Securities in lieu of or in substitution for which other Securities shall have been authenticated and delivered pursuant to the terms of Section 2.07. 
 “Person” means any individual, corporation, partnership, joint venture, joint-stock company, limited liability company, association, trust, unincorporated organization, any other
entity or organization, including a government or political subdivision or an agency or instrumentality thereof. 

“Predecessor Security” of any particular Security means every previous Security evidencing all or a portion of
the same debt as that evidenced by such particular Security; and, for the purposes of this definition, any Security authenticated and delivered under Section 2.07 in lieu of a lost, destroyed or stolen Security shall be deemed to evidence the
same debt as the lost, destroyed or stolen Security. 
 “Responsible Officer” when used with respect to
the Trustee means any trust officer, any corporate trust officer including any vice president or assistant vice president of the Trustee customarily performing functions similar to those performed by the Persons who at the time shall be such
officers, respectively, or to whom any corporate trust matter is referred because of his or her knowledge of and familiarity with the particular subject. 
 “Securities” means the debt Securities authenticated and delivered under this Indenture. 
 “Securityholder” , “holder of Securities”, “registered holder”, or other similar term, means the Person or Persons in whose name or
names a particular Security shall be registered on the books of the Company kept for that purpose in accordance with the terms of this Indenture. 
 “Security Register” and “Security Registrar” shall have the meanings as set forth in Section 2.05. 

“Subsidiary” means, with respect to any Person, (i) any corporation at least a majority of whose outstanding
Voting Stock shall at the time be owned, directly or indirectly, by such Person or by one or more of its Subsidiaries or by such Person and one or more of its Subsidiaries, (ii) any general partnership, joint venture or similar entity, at least
a majority of whose outstanding partnership or similar interests shall at the time be owned by such Person, or by one or more of its Subsidiaries, or by such Person and one or more of its Subsidiaries and (iii) any limited partnership of which
such Person or any of its Subsidiaries is a general partner. 
 “Trustee” means Wells Fargo Bank,
National Association, and, subject to the provisions of Article Seven, shall also include its successors and assigns, and, if at any time there is more than one Person acting in such capacity hereunder, “Trustee” shall mean each such
Person. The term “Trustee” as used with respect to a particular series of the Securities shall mean the trustee with respect to that series. 
 “Trust Indenture Act” means the Trust Indenture Act of 1939, as amended. 

  
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 “Voting Stock”, as applied to stock of any Person, means shares,
interests, participations or other equivalents in the equity interest (however designated) in such Person having ordinary voting power for the election of a majority of the directors (or the equivalent) of such Person, other than shares, interests,
participations or other equivalents having such power only by reason of the occurrence of a contingency. 
 ARTICLE 2

 ISSUE, DESCRIPTION, TERMS, EXECUTION, REGISTRATION 

AND EXCHANGE OF SECURITIES 
 Section 2.01 Designation and Terms of Securities. 
 (a)
The aggregate principal amount of Securities that may be authenticated and delivered under this Indenture is unlimited. The Securities may be issued in one or more series up to the aggregate principal amount of Securities of that series from
time to time authorized by or pursuant to a Board Resolution or pursuant to one or more indentures supplemental hereto. Prior to the initial issuance of Securities of any series, there shall be established in or pursuant to a Board Resolution, and
set forth in an Officers’ Certificate, or established in one or more indentures supplemental hereto: 
 (1) the
title of the Securities of the series (which shall distinguish the Securities of that series from all other Securities); 

(2) any limit upon the aggregate principal amount of the Securities of that series that may be authenticated and delivered under
this Indenture (except for Securities authenticated and delivered upon registration of transfer of, or in exchange for, or in lieu of, other Securities of that series); 
 (3) the date or dates on which the principal of the Securities of the series is payable, any original issue discount that may apply to the Securities of that series upon their issuance, the
principal amount due at maturity, and the place(s) of payment; 
 (4) the rate or rates at which the Securities of the
series shall bear interest or the manner of calculation of such rate or rates, if any; 
 (5) the date or dates from
which such interest shall accrue, the Interest Payment Dates on which such interest will be payable or the manner of determination of such Interest Payment Dates, the place(s) of payment, and the record date for the determination of holders to whom
interest is payable on any such Interest Payment Dates or the manner of determination of such record dates; 
 (6) the
right, if any, to extend the interest payment periods and the duration of such extension; 
 (7) the period or periods
within which, the price or prices at which and the terms and conditions upon which Securities of the series may be redeemed, in whole or in part, at the option of the Company; 
 (8) the obligation, if any, of the Company to redeem or purchase Securities of the series pursuant to any sinking fund, mandatory redemption, or analogous provisions (including payments made in
cash in satisfaction of future sinking fund obligations) or at the option of a holder thereof and the period or periods within which, the price or prices at which, and the terms and conditions upon which, Securities of the series shall be redeemed
or purchased, in whole or in part, pursuant to such obligation; 
 (9) the form of the Securities of the series including
the form of the Certificate of Authentication for such series; 
 (10) if other than denominations of one thousand
U.S. dollars ($1,000) or any integral multiple thereof, the denominations in which the Securities of the series shall be issuable; 

  
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 (11) any and all other terms (including terms, to the extent applicable, relating to
any auction or remarketing of the Securities of that series and any security for the obligations of the Company with respect to such Securities) with respect to such series (which terms shall not be inconsistent with the terms of this Indenture, as
amended by any supplemental indenture) including any terms which may be required by or advisable under United States laws or regulations or advisable in connection with the marketing of Securities of that series; 

(12) whether the Securities are issuable as a Global Security and, in such case, the terms and the identity of the Depositary for
such series; 
 (13) whether the Securities will be convertible into or exchangeable for shares of common stock or other
securities of the Company or any other Person and, if so, the terms and conditions upon which such Securities will be so convertible or exchangeable, including the conversion or exchange price, as applicable, or how it will be calculated and may be
adjusted, any mandatory or optional (at the Company’s option or the holders’ option) conversion or exchange features, and the applicable conversion or exchange period; 

(14) if other than the principal amount thereof, the portion of the principal amount of Securities of the series which shall be
payable upon declaration of acceleration of the maturity thereof pursuant to Section 6.01; 
 (15) any additional or
different Events of Default or restrictive covenants (which may include, among other restrictions, restrictions on the Company’s ability or the ability of the Company’s Subsidiaries to: incur additional indebtedness; issue additional
securities; create liens; pay dividends or make distributions in respect of their capital stock; redeem capital stock; place restrictions on such Subsidiaries placing restrictions on their ability to pay dividends, make distributions or transfer
assets; make investments or other restricted payments; sell or otherwise dispose of assets; enter into sale-leaseback transactions; engage in transactions with stockholders and affiliates; issue or sell stock of their Subsidiaries; or effect a
consolidation or merger) or financial covenants (which may include, among other financial covenants, financial covenants that require the Company and its Subsidiaries to maintain specified interest coverage, fixed charge, cash flow-based or
asset-based ratios) provided for with respect to the Securities of the series; 
 (16) if other than dollars, the coin or
currency in which the Securities of the series are denominated (including, but not limited to, foreign currency); 
 (17)
the terms and conditions, if any, upon which the Company shall pay amounts in addition to the stated interest, premium, if any and principal amounts of the Securities of the series to any Securityholder that is not a “United States
person” for federal tax purposes; and 
 (18) any restrictions on transfer, sale or assignment of the Securities of
the series. 
 All Securities of any one series shall be substantially identical except as to denomination and except as may
otherwise be provided in or pursuant to any such Board Resolution or in any indentures supplemental hereto. 
 If any of the
terms of the series are established by action taken pursuant to a Board Resolution of the Company, a copy of an appropriate record of such action shall be certified by the secretary or an assistant secretary of the Company and delivered to the
Trustee at or prior to the delivery of the Officers’ Certificate of the Company setting forth the terms of the series. 

Securities of any particular series may be issued at various times, with different dates on which the principal or any installment of
principal is payable, with different rates of interest, if any, or different methods by which rates of interest may be determined, with different dates on which such interest may be payable and with different redemption dates. 

Section 2.02 Form of Securities and Trustee’s Certificate. 

The Securities of any series and the Trustee’s certificate of authentication to be borne by such Securities shall be substantially
of the tenor and purport as set forth in one or more indentures supplemental hereto or as 

  
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provided in a Board Resolution, and set forth in an Officers’ Certificate, and they may have such 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 Securities of that series may be listed, or to conform to usage. 
 Section 2.03 Denominations: Provisions for Payment. 
 The
Securities shall be issuable as registered Securities and in the denominations of one thousand U.S. dollars ($1,000) or any integral multiple thereof, subject to Section 2.01(a)(10). The Securities of a particular series shall bear
interest payable on the dates and at the rate specified with respect to that series. Subject to Section 2.01(a)(16), the principal of and the interest on the Securities of any series, as well as any premium thereon in case of redemption thereof
prior to maturity, shall be payable in the coin or currency of the United States of America that at the time is legal tender for public and private debt, at the office or agency of the Company maintained for that purpose in Minneapolis, MN. Each
Security shall be dated the date of its authentication. Interest on the Securities shall be computed on the basis of a 360-day year composed of twelve 30-day months. 
 The interest installment on any Security that is payable, and is punctually paid or duly provided for, on any Interest Payment Date for Securities of that series shall be paid to the Person in whose name
said Security (or one or more Predecessor Securities) is registered at the close of business on the regular record date for such interest installment. In the event that any Security of a particular series or portion thereof is called for redemption
and the redemption date is subsequent to a regular record date with respect to any Interest Payment Date and prior to such Interest Payment Date, interest on such Security will be paid upon presentation and surrender of such Security as provided in
Section 3.03. 
 Any interest on any Security that is payable, but is not punctually paid or duly provided for, on any
Interest Payment Date for Securities of the same series (herein called “Defaulted Interest”) shall forthwith cease to be payable to the registered holder on the relevant regular record date by virtue of having been such holder; and such
Defaulted Interest shall be paid by the Company, at its election, as provided in clause (1) or clause (2) below: 
 (1) The Company may make payment of any Defaulted Interest on Securities to the Persons in whose names such Securities (or their respective Predecessor 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 notify the Trustee in writing of the amount of Defaulted Interest proposed to be paid on each such Security
and the date of the proposed payment, and at the same time the Company shall deposit with the Trustee an amount of money equal to the aggregate amount proposed to be paid in respect of such Defaulted Interest or shall make arrangements satisfactory
to the Trustee for such deposit prior to the date of the proposed payment, such money when deposited to be held in trust for the benefit of the Persons entitled to such Defaulted Interest as in this clause provided. Thereupon the Trustee shall fix a
special record date for the payment of such Defaulted Interest which shall not be more than 15 nor less than 10 days prior to the date of the proposed payment and not less than 10 days after the receipt by the Trustee of the
notice of the proposed payment. The Trustee shall promptly notify the Company of such special record date and, in the name and at the expense of the Company, shall cause notice of the proposed payment of such Defaulted Interest and the special
record date therefor to be mailed, first class postage prepaid, or electronic facsimile in the case of book entry, to each Securityholder at his or her address as it appears in the Security Register (as hereinafter defined), not less
than 10 days prior to such special record date. Notice of the proposed payment of such Defaulted Interest and the special record date therefor having been mailed as aforesaid, such Defaulted Interest shall be paid to the Persons in whose
names such Securities (or their respective Predecessor Securities) are registered on such special record date and shall be no longer payable pursuant to the following clause (2). 

(2) The Company may make payment of any Defaulted Interest on any Securities in any other lawful manner not inconsistent with the
requirements of any securities exchange on which such Securities may be listed, and upon such notice as may be required by such exchange, if, after written notice given by the Company to the Trustee of the proposed payment pursuant to this clause,
such manner of payment shall be deemed practicable by the Trustee. 

  
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 Unless otherwise set forth in a Board Resolution or one or more indentures supplemental
hereto establishing the terms of any series of Securities pursuant to Section 2.01 hereof, the term “regular record date” as used in this Section with respect to a series of Securities and any Interest Payment Date for such series
shall mean either the fifteenth day of the month immediately preceding the month in which an Interest Payment Date established for such series pursuant to Section 2.01 hereof shall occur, if such Interest Payment Date is the first day of a
month, or the first day of the month in which an Interest Payment Date established for such series pursuant to Section 2.01 hereof shall occur, if such Interest Payment Date is the fifteenth day of a month, whether or not such date is a
Business Day. 
 Subject to the foregoing provisions of this Section, each Security of a series delivered under this Indenture
upon transfer of or in exchange for or in lieu of any other Security of such series shall carry the rights to interest accrued and unpaid, and to accrue, that were carried by such other Security. 

Section 2.04 Execution and Authentications. 
 The Securities shall be signed on behalf of the Company by one of its Officers. Signatures may be in the form of a manual or facsimile signature. 

The Company may use the facsimile signature of any Person who shall have been an Officer, notwithstanding the fact that at the time the
Securities shall be authenticated and delivered or disposed of such Person shall have ceased to be such an officer of the Company. The seal of the Company may be in the form of a facsimile of such seal and may be impressed, affixed, imprinted or
otherwise reproduced on the Securities. The Securities may contain such notations, legends or endorsements required by law, stock exchange rule or usage. Each Security shall be dated the date of its authentication by the Trustee. 

A Security shall not be valid until authenticated manually by an authorized signatory of the Trustee, or by an Authenticating Agent. Such
signature shall be conclusive evidence that the Security so authenticated has been duly authenticated and delivered hereunder and that the holder is entitled to the benefits of this Indenture. At any time and from time to time after the execution
and delivery of this Indenture, the Company may deliver Securities of any series executed by the Company to the Trustee for authentication, together with a written order of the Company for the authentication and delivery of such Securities, signed
by an Officer, and the Trustee in accordance with such written order shall authenticate and deliver such Securities. 
 In
authenticating such Securities and accepting the additional responsibilities under this Indenture in relation to such Securities, the Trustee shall be entitled to receive, and (subject to Section 7.01) shall be fully protected in relying upon,
an Opinion of Counsel stating that the form and terms thereof have been established in conformity with the provisions of this Indenture. 
 The Trustee shall not be required to authenticate such Securities if the issue of such Securities pursuant to this Indenture will affect the Trustee’s own rights, duties or immunities under the
Securities and this Indenture or otherwise in a manner that is not reasonably acceptable to the Trustee. 
 Section 2.05
Registration of Transfer and Exchange. 
 (a) Securities of any series may be exchanged upon presentation
thereof at the office or agency of the Company designated for such purpose in Minneapolis, MN, for other Securities of such series of authorized denominations, and for a like aggregate principal amount, upon payment of a sum sufficient to cover any
tax or other governmental charge in relation thereto, all as provided in this Section. In respect of any Securities so surrendered for exchange, the Company shall execute, the Trustee shall authenticate and such office or agency shall deliver in
exchange therefor the Security or Securities of the same series that the Securityholder making the exchange shall be entitled to receive, bearing numbers not contemporaneously outstanding. 

(b) The Company shall keep, or cause to be kept, at its office or agency designated for such purpose in Minneapolis, MN, or such
other location designated by the Company, a register or registers (herein referred to as the “Security Register”) in which, subject to such reasonable regulations as it may prescribe, the Company shall register


  
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the Securities and the transfers of Securities as in this Article provided and which at all reasonable times shall be open for inspection by the Trustee. The registrar for the purpose of
registering Securities and transfer of Securities as herein provided shall be appointed as authorized by Board Resolution (the “Security Registrar”). 
 Upon surrender for transfer of any Security at the office or agency of the Company designated for such purpose, the Company shall execute, the Trustee shall authenticate and such office or agency shall
deliver in the name of the transferee or transferees a new Security or Securities of the same series as the Security presented for a like aggregate principal amount. 
 All Securities presented or surrendered for exchange or registration of transfer, as provided in this Section, shall be accompanied (if so required by the Company or the Security Registrar) by a written
instrument or instruments of transfer, in form satisfactory to the Company or the Security Registrar, duly executed by the registered holder or by such holder’s duly authorized attorney in writing. 

(c) Except as provided pursuant to Section 2.01 pursuant to a Board Resolution, and set forth in an Officers’
Certificate, or established in one or more indentures supplemental to this Indenture, no service charge shall be made for any exchange or registration of transfer of Securities, or issue of new Securities in case of partial redemption of any series,
but the Company may require payment of a sum sufficient to cover any tax or other governmental charge in relation thereto, other than exchanges pursuant to Section 2.06, Section 3.03(b) and Section 9.04 not involving any
transfer. 
 (d) The Company shall not be required (i) to issue, exchange or register the transfer of any Securities
during a period beginning at the opening of business 15 days before the day of the mailing of a notice of redemption of less than all the Outstanding Securities of the same series and ending at the close of business on the day of such
mailing, nor (ii) to register the transfer of or exchange any Securities of any series or portions thereof called for redemption, other than the unredeemed portion of any such Securities being redeemed in part. The provisions of this
Section 2.05 are, with respect to any Global Security, subject to Section 2.11 hereof. 
 Section 2.06
Temporary Securities. 
 Pending the preparation of definitive Securities of any series, the Company may execute, and
the Trustee shall authenticate and deliver, temporary Securities (printed, lithographed or typewritten) of any authorized denomination. Such temporary Securities shall be substantially in the form of the definitive Securities in lieu of which they
are issued, but with such omissions, insertions and variations as may be appropriate for temporary Securities, all as may be determined by the Company. Every temporary Security of any series shall be executed by the Company and be authenticated by
the Trustee upon the same conditions and in substantially the same manner, and with like effect, as the definitive Securities of such series. Without unnecessary delay the Company will execute and will furnish definitive Securities of such series
and thereupon any or all temporary Securities of such series may be surrendered in exchange therefor (without charge to the holders), at the office or agency of the Company designated for the purpose in Minneapolis, MN, and the Trustee shall
authenticate and such office or agency shall deliver in exchange for such temporary Securities an equal aggregate principal amount of definitive Securities of such series, unless the Company advises the Trustee to the effect that definitive
Securities need not be executed and furnished until further notice from the Company. Until so exchanged, the temporary Securities of such series shall be entitled to the same benefits under this Indenture as definitive Securities of such series
authenticated and delivered hereunder. 
 Section 2.07 Mutilated, Destroyed, Lost or Stolen Securities.

 In case any temporary or definitive Security shall become mutilated or be destroyed, lost or stolen, the Company (subject
to the next succeeding sentence) shall execute, and upon the Company’s request the Trustee (subject as aforesaid) shall authenticate and deliver, a new Security of the same series, bearing a number not contemporaneously outstanding, in exchange
and substitution for the mutilated Security, or in lieu of and in substitution for the Security so destroyed, lost or stolen. In every case the applicant for a substituted Security shall furnish to the Company and the Trustee such security or
indemnity as may be required by them to save each of them harmless, and, in every case of destruction, loss or theft, the applicant shall also furnish to the Company and the Trustee evidence to their satisfaction of the destruction, loss or theft of
the applicant’s Security and of the ownership 

  
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thereof. The Trustee may authenticate any such substituted Security and deliver the same upon the written request or authorization of any officer of the Company. Upon the issuance of any
substituted Security, 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) connected
therewith. 
 In case any Security that has matured or is about to mature shall become mutilated or be destroyed, lost or
stolen, the Company may, instead of issuing a substitute Security, pay or authorize the payment of the same (without surrender thereof except in the case of a mutilated Security) if the applicant for such payment shall furnish to the Company and the
Trustee such security or indemnity as they may require to save them harmless, and, in case of destruction, loss or theft, evidence to the satisfaction of the Company and the Trustee of the destruction, loss or theft of such Security and of the
ownership thereof. 
 Every replacement Security issued pursuant to the provisions of this Section shall constitute an
additional contractual obligation of the Company whether or not the mutilated, destroyed, lost or stolen Security shall be found at any time, or be enforceable by anyone, and shall be entitled to all the benefits of this Indenture equally and
proportionately with any and all other Securities of the same series duly issued hereunder. All Securities shall be held and owned upon the express condition that the foregoing provisions are exclusive with respect to the replacement or payment of
mutilated, destroyed, lost or stolen Securities, and shall preclude (to the extent lawful) any and all other rights or remedies, notwithstanding any law or statute existing or hereafter enacted to the contrary with respect to the replacement or
payment of negotiable instruments or other securities without their surrender. 
 Section 2.08 Cancellation.

 All Securities surrendered for the purpose of payment, redemption, exchange or registration of transfer shall, if
surrendered to the Company or any paying agent, be delivered to the Trustee for cancellation, or, if surrendered to the Trustee, shall be cancelled by it, and no Securities shall be issued in lieu thereof except as expressly required or permitted by
any of the provisions of this Indenture. On request of the Company at the time of such surrender, the Trustee shall deliver to the Company canceled Securities held by the Trustee. In the absence of such request the Trustee may dispose of canceled
Securities in accordance with its standard procedures and deliver a certificate of disposition to the Company. If the Company shall otherwise acquire any of the Securities, however, such acquisition shall not operate as a redemption or satisfaction
of the indebtedness represented by such Securities unless and until the same are delivered to the Trustee for cancellation. 

Section 2.09 Benefits of Indenture. 
 Nothing in this Indenture or in the Securities, express or implied, shall give or be construed to give to any Person, other than the parties hereto and the holders of the Securities any legal or equitable
right, remedy or claim under or in respect of this Indenture, or under any covenant, condition or provision herein contained; all such covenants, conditions and provisions being for the sole benefit of the parties hereto and of the holders of the
Securities. 
 Section 2.10 Authenticating Agent. 

So long as any of the Securities of any series remain Outstanding there may be an Authenticating Agent for any or all such series of
Securities which the Trustee shall have the right to appoint. Said Authenticating Agent shall be authorized to act on behalf of the Trustee to authenticate Securities of such series issued upon exchange, transfer or partial redemption thereof, and
Securities so authenticated shall be entitled to the benefits of this Indenture and shall be valid and obligatory for all purposes as if authenticated by the Trustee hereunder. All references in this Indenture to the authentication of Securities by
the Trustee shall be deemed to include authentication by an Authenticating Agent for such series. Each Authenticating Agent shall be acceptable to the Company and shall be a corporation that has a combined capital and surplus, as most recently
reported or determined by it, sufficient under the laws of any jurisdiction under which it is organized or in which it is doing business to conduct a trust business, and that is otherwise authorized under such laws to conduct such business and is
subject to supervision or examination by federal or state authorities. If at any time any Authenticating Agent shall cease to be eligible in accordance with these provisions, it shall resign immediately. 

  
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 Any Authenticating Agent may at any time resign by giving written notice of resignation to
the Trustee and to the Company. The Trustee may at any time (and upon request by the Company shall) terminate the agency of any Authenticating Agent by giving written notice of termination to such Authenticating Agent and to the Company. Upon
resignation, termination or cessation of eligibility of any Authenticating Agent, the Trustee may appoint an eligible successor Authenticating Agent acceptable to the Company. Any successor Authenticating Agent, upon acceptance of its appointment
hereunder, shall become vested with all the rights, powers and duties of its predecessor hereunder as if originally named as an Authenticating Agent pursuant hereto. 
 Section 2.11 Global Securities. 
 (a) If the Company
shall establish pursuant to Section 2.01 that the Securities of a particular series are to be issued as a Global Security, then the Company shall execute and the Trustee shall, in accordance with Section 2.04, authenticate and deliver, a
Global Security that (i) shall represent, and shall be denominated in an amount equal to the aggregate principal amount of, all of the Outstanding Securities of such series, (ii) shall be registered in the name of the Depositary or its
nominee, (iii) shall be delivered by the Trustee to the Depositary or pursuant to the Depositary’s instruction and (iv) shall bear a legend substantially to the following effect: “Except as otherwise provided in Section 2.11
of the Indenture, this Security may be transferred, in whole but not in part, only to another nominee of the Depositary or to a successor Depositary or to a nominee of such successor Depositary.” 

(b) Notwithstanding the provisions of Section 2.05, the Global Security of a series may be transferred, in whole but not in
part and in the manner provided in Section 2.05, only to another nominee of the Depositary for such series, or to a successor Depositary for such series selected or approved by the Company or to a nominee of such successor Depositary.

 (c) If at any time the Depositary for a series of the Securities notifies the Company that it is unwilling or unable
to continue as Depositary for such series or if at any time the Depositary for such series 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
series 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, or if an Event of Default has occurred and is continuing and the Company has received a
request from the Depositary, this Section 2.11 shall no longer be applicable to the Securities of such series and the Company will execute, and subject to Section 2.04, the Trustee will authenticate and deliver the Securities of such
series in definitive registered form without coupons, in authorized denominations, and in an aggregate principal amount equal to the principal amount of the Global Security of such series in exchange for such Global Security. In addition, the
Company may at any time determine that the Securities of any series shall no longer be represented by a Global Security and that the provisions of this Section 2.11 shall no longer apply to the Securities of such series. In such event the
Company will execute and, subject to Section 2.04, the Trustee, upon receipt of an Officers’ Certificate evidencing such determination by the Company, will authenticate and deliver the Securities of such series in definitive registered
form without coupons, in authorized denominations, and in an aggregate principal amount equal to the principal amount of the Global Security of such series in exchange for such Global Security. Upon the exchange of the Global Security for such
Securities in definitive registered form without coupons, in authorized denominations, the Global Security shall be canceled by the Trustee. Such Securities in definitive registered form issued in exchange for the Global Security pursuant to this
Section 2.11(c) 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 Securities to the Depositary for delivery to the Persons in whose names such Securities are so registered. 
 ARTICLE 3

 REDEMPTION OF SECURITIES AND SINKING FUND PROVISIONS 

Section 3.01 Redemption. 
 The Company may redeem the Securities of any series issued hereunder on and after the dates and in accordance with the terms established for such series pursuant to Section 2.01 hereof. 

  
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 Section 3.02 Notice of Redemption. 

(a) In case the Company shall desire to exercise such right to redeem all or, as the case may be, a portion of the Securities of
any series in accordance with any right the Company reserved for itself to do so pursuant to Section 2.01 hereof, the Company shall, or shall cause the Trustee to, give notice of such redemption to holders of the Securities of such series to be
redeemed by mailing, first class postage prepaid, or electronic facsimile in the case of book entry, a notice of such redemption not less than 30 days and not more than 90 days before the date fixed for redemption of that series
to such holders at their last addresses as they shall appear upon the Security Register, unless a shorter period is specified in the Securities to be redeemed. Any notice that is mailed in the manner herein provided shall be conclusively presumed to
have been duly given, whether or not the registered holder receives the notice. In any case, failure duly to give such notice to the holder of any Security of any series designated for redemption in whole or in part, or any defect in the notice,
shall not affect the validity of the proceedings for the redemption of any other Securities of such series or any other series. In the case of any redemption of Securities prior to the expiration of any restriction on such redemption provided in the
terms of such Securities or elsewhere in this Indenture, the Company shall furnish the Trustee with an Officers’ Certificate evidencing compliance with any such restriction. 

Each such notice of redemption shall specify the date fixed for redemption and the redemption price at which Securities of that series
are to be redeemed, and shall state that payment of the redemption price of such Securities to be redeemed will be made at the office or agency of the Company in Minneapolis, MN, upon presentation and surrender of such Securities, that interest
accrued to the date fixed for redemption will be paid as specified in said notice, that from and after said date interest will cease to accrue and that the redemption is for a sinking fund, if such is the case. If less than all the Securities of a
series are to be redeemed, the notice to the holders of Securities of that series to be redeemed in part shall specify the particular Securities to be so redeemed. 
 In case any Security is to be redeemed in part only, the notice that relates to such Security shall state the portion of the principal amount thereof to be redeemed, and shall state that on and after the
redemption date, upon surrender of such Security, a new Security or Securities of such series in principal amount equal to the unredeemed portion thereof will be issued. 
 (b) If less than all the Securities of a series are to be redeemed, the Company shall give the Trustee at least 45 days’ notice (unless a shorter notice shall be satisfactory to the
Trustee) in advance of the date fixed for redemption as to the aggregate principal amount of Securities of the series to be redeemed, and thereupon the Trustee shall select, by lot or in such other manner as it shall deem appropriate and fair in its
discretion and that may provide for the selection of a portion or portions (equal to one thousand U.S. dollars ($1,000) or any integral multiple thereof) of the principal amount of such Securities of a denomination larger than $1,000, the
Securities to be redeemed and shall thereafter promptly notify the Company in writing of the numbers of the Securities to be redeemed, in whole or in part. The Company may, if and whenever it shall so elect, by delivery of instructions signed on its
behalf by an Officer, instruct the Trustee or any paying agent to call all or any part of the Securities of a particular series for redemption and to give notice of redemption in the manner set forth in this Section, such notice to be in the name of
the Company or its own name as the Trustee or such paying agent may deem advisable. In any case in which notice of redemption is to be given by the Trustee or any such paying agent, the Company shall deliver or cause to be delivered to, or permit to
remain with, the Trustee or such paying agent, as the case may be, such Security Register, transfer books or other records, or suitable copies or extracts therefrom, sufficient to enable the Trustee or such paying agent to give any notice by mail
that may be required under the provisions of this Section. 
 Section 3.03 Payment Upon Redemption.

 (a) If the giving of notice of redemption shall have been completed as above provided, the Securities or portions
of Securities of the series to be redeemed specified in such notice shall become due and payable on the date and at the place stated in such notice at the applicable redemption price, together with interest accrued to the date fixed for redemption
and interest on such Securities or portions of Securities shall cease to accrue on and after the date fixed for redemption, unless the Company shall default in the payment of such redemption price and accrued interest with respect to any such
Security or portion thereof. On presentation and surrender of such Securities on or after the date fixed for redemption at the place of payment specified in the notice, said Securities shall be paid and


  
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redeemed at the applicable redemption price for such series, together with interest accrued thereon to the date fixed for redemption (but if the date fixed for redemption is an interest payment
date, the interest installment payable on such date shall be payable to the registered holder at the close of business on the applicable record date pursuant to Section 2.03). 

(b) Upon presentation of any Security of such series that is to be redeemed in part only, the Company shall execute and the
Trustee shall authenticate and the office or agency where the Security is presented shall deliver to the holder thereof, at the expense of the Company, a new Security of the same series of authorized denominations in principal amount equal to the
unredeemed portion of the Security so presented. 
 Section 3.04 Sinking Fund. 

The provisions of Sections 3.04, 3.05 and 3.06 shall be applicable to any sinking fund for the retirement of Securities of a
series, except as otherwise specified as contemplated by Section 2.01 for Securities of such series. 
 The minimum amount
of any sinking fund payment provided for by the terms of Securities of any series is herein referred to as a “mandatory sinking fund payment,” and any payment in excess of such minimum amount provided for by the terms of Securities of any
series is herein referred to as an “optional sinking fund payment”. If provided for by the terms of Securities of any series, the cash amount of any sinking fund payment may be subject to reduction as provided in Section 3.05. Each
sinking fund payment shall be applied to the redemption of Securities of any series as provided for by the terms of Securities of such series. 
 Section 3.05 Satisfaction of Sinking Fund Payments with Securities. 
 The Company (i) may deliver Outstanding Securities of a series and (ii) may apply as a credit Securities of a series that have been redeemed either at the election of the Company pursuant to the
terms of such Securities or through the application of permitted optional sinking fund payments pursuant to the terms of such Securities, in each case in satisfaction of all or any part of any sinking fund payment with respect to the Securities of
such series required to be made pursuant to the terms of such Securities as provided for by the terms of such series, provided that such Securities have not been previously so credited. Such Securities shall be received and credited for such purpose
by the Trustee at the redemption price specified in such Securities for redemption through operation of the sinking fund and the amount of such sinking fund payment shall be reduced accordingly. 

Section 3.06 Redemption of Securities for Sinking Fund. 

Not less than 45 days prior to each sinking fund payment date for any series of Securities (unless a shorter period shall be
satisfactory to the Trustee), the Company will deliver to the Trustee an Officers’ Certificate specifying the amount of the next ensuing sinking fund payment for that series pursuant to the terms of the series, the portion thereof, if any, that
is to be satisfied by delivering and crediting Securities of that series pursuant to Section 3.05 and the basis for such credit and will, together with such Officers’ Certificate, deliver to the Trustee any Securities to be so delivered.
Not less than 30 days before each such sinking fund payment date the Trustee shall select the Securities to be redeemed upon such sinking fund payment date in the manner specified in Section 3.02 and cause notice of the redemption
thereof to be given in the name of and at the expense of the Company in the manner provided in Section 3.02. Such notice having been duly given, the redemption of such Securities shall be made upon the terms and in the manner stated in
Section 3.03. 
 ARTICLE 4 
 COVENANTS 
 Section 4.01 Payment of Principal, Premium and
Interest. 
 The Company will duly and punctually pay or cause to be paid the principal of (and premium, if any) and
interest on the Securities of that series at the time and place and in the manner provided herein and established with respect to such Securities. Payments of principal on the Securities may be made at the time provided herein and established with
respect to such Securities by U.S. dollar check drawn on and mailed to the address of the 

  
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Securityholder entitled thereto as such address shall appear in the Security Register, or U.S. dollar wire transfer to, a U.S. dollar account (such wire transfer to be made only to a
Securityholder of an aggregate principal amount of Securities of the applicable series in excess of U.S. $2,000,000 and only if such Securityholder shall have furnished wire instructions to the Trustee no later than 15 days prior to
the relevant payment date). Payments of interest on the Securities may be made at the time provided herein and established with respect to such Securities by U.S. dollar check mailed to the address of the Securityholder entitled thereto as such
address shall appear in the Security Register, or U.S. dollar wire transfer to, a U.S. dollar account (such a wire transfer to be made only to a Securityholder of an aggregate principal amount of Securities of the applicable series in
excess of U.S. $2,000,000 and only if such Securityholder shall have furnished wire instructions in writing to the Security Registrar and the Trustee no later than 15 days prior to the relevant payment date. 

Section 4.02 Maintenance of Office or Agency. 

So long as any series of the Securities remain Outstanding, the Company agrees to maintain an office or agency in Minneapolis, MN, with
respect to each such series and at such other location or locations as may be as herein above authorized for registration of transfer and exchange, and (iii) notices and demands to or upon the Company in respect of the Securities of that series
and this Indenture may be given or served, such designation to continue with respect to such office or agency until the Company shall, by written notice signed by any officer authorized to sign an Officers’ Certificate and delivered to the
Trustee, designate some other office or agency for such purposes or any of them. If at any time the Company shall fail to maintain any such required office or agency or shall fail to furnish the Trustee with the address thereof, such presentations,
notices and demands may be made or served at the Corporate Trust Office of the Trustee, and the Company hereby appoints the Trustee as its agent to receive all such presentations, notices and demands. The Company initially appoints the Corporate
Trust Office of the Trustee located in the Borough of Manhattan, the City of New York as its paying agent with respect to the Securities. 
 Section 4.03 Paying Agents. 
 (a) If the Company shall
appoint one or more paying agents for all or any series of the Securities, other than the Trustee, the Company will cause each such paying agent to execute and deliver to the Trustee an instrument in which such agent shall agree with the Trustee,
subject to the provisions of this Section: 
 (1) that it will hold all sums held by it as such agent for the payment of
the principal of (and premium, if any) or interest on the Securities of that series (whether such sums have been paid to it by the Company or by any other obligor of such Securities) in trust for the benefit of the Persons entitled thereto;

 (2) that it will give the Trustee notice of any failure by the Company (or by any other obligor of such Securities) to
make any payment of the principal of (and premium, if any) or interest on the Securities of that series when the same shall be due and payable; 
 (3) that it will, at any time during the continuance of any failure referred to in the preceding paragraph (a)(2) above, upon the written request of the Trustee, forthwith pay to the
Trustee all sums so held in trust by such paying agent; and 
 (4) that it will perform all other duties of paying agent
as set forth in this Indenture. 
 (b) If the Company shall act as its own paying agent with respect to any series of the
Securities, it will on or before each due date of the principal of (and premium, if any) or interest on Securities of that series, set aside, segregate and hold in trust for the benefit of the Persons entitled thereto a sum sufficient to pay such
principal (and premium, if any) or interest so becoming due on Securities of that series until such sums shall be paid to such Persons or otherwise disposed of as herein provided and will promptly notify the Trustee of such action, or any failure
(by it or any other obligor on such Securities) to take such action. Whenever the Company shall have one or more paying agents for any series of Securities, it will, prior to each due date of the principal of (and premium, if any) or interest on any
Securities of that series, deposit with the paying agent a sum sufficient to pay the principal (and premium, if any) or interest so becoming due, such sum to be held in trust for the benefit of the Persons entitled to such principal, premium or
interest, and (unless such paying agent is the Trustee) the Company will promptly notify the Trustee of this action or failure so to act. 

  
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 (c) Notwithstanding anything in this Section to the contrary, (i) the agreement
to hold sums in trust as provided in this Section is subject to the provisions of Section 11.05, and (ii) the Company may at any time, for the purpose of obtaining the satisfaction and discharge of this Indenture or for any other purpose,
pay, or direct any paying agent to pay, to the Trustee all sums held in trust by the Company or such paying agent, such sums to be held by the Trustee upon the same terms and conditions as those upon which such sums were held by the Company or such
paying agent; and, upon such payment by the Company or any paying agent to the Trustee, the Company or such paying agent shall be released from all further liability with respect to such money. 

Section 4.04 Appointment to Fill Vacancy in Office of Trustee. 

The Company, whenever necessary to avoid or fill a vacancy in the office of Trustee, will appoint, in the manner provided in
Section 7.10, a Trustee, so that there shall at all times be a Trustee hereunder. 
 Section 4.05 Compliance with
Consolidation Provisions. 
 The Company will not, while any of the Securities remain Outstanding, consolidate with
or merge into any other Person, in either case where the Company is not the survivor of such transaction, or sell or convey all or substantially all of its property to any other Person unless the provisions of Article Ten hereof are complied with.

 ARTICLE 5 
 SECURITYHOLDERS’ LISTS AND REPORTS BY 
 THE COMPANY AND THE TRUSTEE

 Section 5.01 Company to Furnish Trustee Names and Addresses of Securityholders. 

The Company will furnish or cause to be furnished to the Trustee (a) within 15 days after each regular record date (as
defined in Section 2.03) a list, in such form as the Trustee may reasonably require, of the names and addresses of the holders of each series of Securities as of such regular record date, provided that the Company shall not be obligated to
furnish or cause to furnish such list at any time that the list shall not differ in any respect from the most recent list furnished to the Trustee by the Company and (b) at such other times as the Trustee may request in writing
within 30 days after the receipt by the Company of any such request, a list of similar form and content as of a date not more than 15 days prior to the time such list is furnished; provided, however, that, in either case, no such
list need be furnished for any series for which the Trustee shall be the Security Registrar. 
 Section 5.02
Preservation Of Information; Communications With Securityholders. 
 (a) The Trustee shall preserve, in as
current a form as is reasonably practicable, all information as to the names and addresses of the holders of Securities contained in the most recent list furnished to it as provided in Section 5.01 and as to the names and addresses of holders
of Securities received by the Trustee in its capacity as Security Registrar (if acting in such capacity). 
 (b) The
Trustee may destroy any list furnished to it as provided in Section 5.01 upon receipt of a new list so furnished. 
 (c)
Securityholders may communicate as provided in Section 312(b) of the Trust Indenture Act with other Securityholders with respect to their rights under this Indenture or under the Securities, and, in connection with any such
communications, the Trustee shall satisfy its obligations under Section 312(b) of the Trust Indenture Act in accordance with the provisions of Section 312(b) of the Trust Indenture Act. 

  
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 Section 5.03 Reports by the Company. 

(a) The Company covenants and agrees to provide to the Trustee (which delivery may be via electronic mail), after the Company
files the same with the Securities and Exchange Commission, copies of the annual reports and of the information, documents and other reports (or copies of such portions of any of the foregoing as the Securities and Exchange Commission may from time
to time by rules and regulations prescribe) that the Company files with the Securities and Exchange Commission pursuant to Section 13 or Section 15(d) of the Exchange Act; or, if the Company is not required to file information,
documents or reports pursuant to either of such sections, then to file with the Trustee, in accordance with the rules and regulations prescribed from time to time by the Securities and Exchange Commission, such of the supplementary and periodic
information, documents and reports that may be required pursuant to Section 13 of the Exchange Act, in respect of a security listed and registered on a national securities exchange as may be prescribed from time to time in such rules and
regulations; provided, however, the Company shall not be required to deliver to the Trustee any materials for which the Company has sought and received confidential treatment by the Securities and Exchange Commission; and provided further, so long
as such filings are available on the Securities and Exchange Commission’s Electronic Data Gathering, Analysis and Retrieval System (EDGAR) or any successor system thereto, such filings shall be deemed to have been filed with the Trustee
for purposes of this Section 5.03 without any further action required by the Company; provided, however, that the Trustee shall have no responsibility whatsoever to determine whether such filings or postings have been made. 

(b) The Company covenants and agrees to file with the Trustee and the Securities and Exchange Commission, in accordance with the
rules and regulations prescribed from to time by the Securities and Exchange Commission, such additional information, documents and reports with respect to compliance by the Company with the conditions and covenants provided for in this Indenture as
may be required from time to time by such rules and regulations. 
 (c) The Company covenants and agrees to transmit by
mail, first class postage prepaid, or reputable over-night delivery service that provides for evidence of receipt, to the Securityholders, as their names and addresses appear upon the Security Register, within 30 days after the filing
thereof with the Trustee, such summaries of any information, documents and reports required to be filed by the Company pursuant to subsections (a) and (b) of this Section as may be required by rules and regulations prescribed from
time to time by the Securities and Exchange Commission. 
 Section 5.04 Reports by the Trustee. 

(a) If required by Section 313(a) of the Trust Indenture Act, the Trustee, within sixty (60) days after each
May 1, shall transmit by mail, first class postage prepaid, to the Securityholders, as their names and addresses appear upon the Security Register, a brief report dated as of such May 1, which complies with Section 313(a) of the
Trust Indenture Act. 
 (b) The Trustee shall comply with Section 313(b) and 313(c) of the Trust
Indenture Act. 
 (c) A copy of each such report shall, at the time of such transmission to Securityholders, be filed by
the Trustee with the Company, with each securities exchange upon which any Securities are listed (if so listed) and also with the Securities and Exchange Commission. The Company agrees to notify the Trustee when any Securities become listed on any
securities exchange. 
 ARTICLE 6 
 REMEDIES OF THE TRUSTEE AND 
 SECURITYHOLDERS ON EVENT OF DEFAULT

 Section 6.01 Events of Default. 

(a) Whenever used herein with respect to Securities of a particular series, “Event of Default” means any one or more of
the following events that has occurred and is continuing: 
 (1) the Company defaults in the payment of any installment
of interest upon any of the Securities of that series, as and when the same shall become due and payable, and such default continues for a period of 90 days; provided, however, that a valid extension of an interest payment period by the
Company in accordance with the terms of any indenture supplemental hereto shall not constitute a default in the payment of interest for this purpose; 

  
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 (2) the Company defaults in the payment of the principal of (or premium, if any, on)
any of the Securities of that series as and when the same shall become due and payable whether at maturity, upon redemption, by declaration or otherwise, or in any payment required by any sinking or analogous fund established with respect to that
series; provided, however, that a valid extension of the maturity of such Securities in accordance with the terms of any indenture supplemental hereto shall not constitute a default in the payment of principal or premium, if any; 

(3) the Company fails to observe or perform any other of its covenants or agreements with respect to that series contained in this
Indenture or otherwise established with respect to that series of Securities pursuant to Section 2.01 hereof (other than a covenant or agreement that has been expressly included in this Indenture solely for the benefit of one or more series of
Securities other than such series) for a period of 90 days after the date on which written notice of such failure, requiring the same to be remedied and stating that such notice is a “Notice of Default” hereunder, shall have been
given to the Company by the Trustee, by registered or certified mail, or to the Company and the Trustee by the holders of at least 25% in principal amount of the Securities of that series at the time Outstanding; 

(4) the Company pursuant to or within the meaning of any Bankruptcy Law (i) commences a voluntary case, (ii) consents to
the entry of an order for relief against it in an involuntary case, (iii) consents to the appointment of a Custodian of it or for all or substantially all of its property or (iv) makes a general assignment for the benefit of its creditors;
or 
 (5) a court of competent jurisdiction enters an order under any Bankruptcy Law that (i) is for relief against
the Company in an involuntary case, (ii) appoints a Custodian of the Company for all or substantially all of its property or (iii) orders the liquidation of the Company, and the order or decree remains unstayed and in effect
for 90 days. 
 (b) In each and every such case (other than an Event of Default specified in
clause (4) or clause (5) above), unless the principal of all the Securities of that series shall have already become due and payable, either the Trustee or the holders of not less than 25% in aggregate principal amount of
the Securities of that series then Outstanding hereunder, by notice in writing to the Company (and to the Trustee if given by such Securityholders), may declare the principal of (and premium, if any, on) and accrued and unpaid interest on all the
Securities of that series to be due and payable immediately, and upon any such declaration the same shall become and shall be immediately due and payable. If an Event of Default specified in clause (4) or clause (5) above occurs,
the principal of and accrued and unpaid interest on all the Securities of that series shall automatically be immediately due and payable without any declaration or other act on the part of the Trustee or the holders of the Securities. 

(c) At any time after the principal of (and premium, if any, on) and accrued and unpaid interest on the Securities of that series
shall have been so declared due and payable, and before any judgment or decree for the payment of the moneys due shall have been obtained or entered as hereinafter provided, the holders of a majority in aggregate principal amount of the Securities
of that series then Outstanding hereunder, by written notice to the Company and the Trustee, may rescind and annul such declaration and its consequences if: (i) the Company has paid or deposited with the Trustee a sum sufficient to pay all
matured installments of interest upon all the Securities of that series and the principal of (and premium, if any, on) any and all Securities of that series that shall have become due otherwise than by acceleration (with interest upon such principal
and premium, if any, and, to the extent that such payment is enforceable under applicable law, upon overdue installments of interest, at the rate per annum expressed in the Securities of that series to the date of such payment or deposit) and the
amount payable to the Trustee under Section 7.06, and (ii) any and all Events of Default under the Indenture with respect to such series, other than the nonpayment of principal on (and premium, if any, on) and accrued and unpaid interest
on Securities of that series that shall not have become due by their terms, shall have been remedied or waived as provided in Section 6.06. 

  
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 No such rescission and annulment shall extend to or shall affect any subsequent default or
impair any right consequent thereon. 
 (d) In case the Trustee shall have proceeded to enforce any right with respect to
Securities of that series under this Indenture and such proceedings shall have been discontinued or abandoned because of such rescission or annulment or for any other reason or shall have been determined adversely to the Trustee, then and in every
such case, subject to any determination in such proceedings, the Company and the Trustee shall be restored respectively to their former positions and rights hereunder, and all rights, remedies and powers of the Company and the Trustee shall continue
as though no such proceedings had been taken. 
 Section 6.02 Collection of Indebtedness and Suits for Enforcement by
Trustee. 
 (a) The Company covenants that (i) in case it shall default in the payment of any installment
of interest on any of the Securities of a series, or in any payment required by any sinking or analogous fund established with respect to that series as and when the same shall have become due and payable, and such default shall have continued for a
period of 90 days, or (ii) in case it shall default in the payment of the principal of (or premium, if any, on) any of the Securities of a series when the same shall have become due and payable, whether upon maturity of the Securities
of a series or upon redemption or upon declaration or otherwise then, upon demand of the Trustee, the Company will pay to the Trustee, for the benefit of the holders of the Securities of that series, the whole amount that then shall have been become
due and payable on all such Securities for principal (and premium, if any) or interest, or both, as the case may be, with interest upon the overdue principal (and premium, if any) and (to the extent that payment of such interest is enforceable under
applicable law) upon overdue installments of interest at the rate per annum expressed in the Securities of that series; and, in addition thereto, such further amount as shall be sufficient to cover the costs and expenses of collection, and the
amount payable to the Trustee under Section 7.06. 
 (b) If the Company shall fail to pay such amounts forthwith
upon such demand, the Trustee, in its own name and as trustee of an express trust, shall be entitled and empowered to institute any action or proceedings at law or in equity for the collection of the sums so due and unpaid, and may prosecute any
such action or proceeding to judgment or final decree, and may enforce any such judgment or final decree against the Company or other obligor upon the Securities of that series and collect the moneys adjudged or decreed to be payable in the manner
provided by law or equity out of the property of the Company or other obligor upon the Securities of that series, wherever situated. 
 (c) In case of any receivership, insolvency, liquidation, bankruptcy, reorganization, readjustment, arrangement, composition or judicial proceedings affecting the Company, or its creditors or
property, the Trustee shall have power to intervene in such proceedings and take any action therein that may be permitted by the court and shall (except as may be otherwise provided by law) be entitled to file such proofs of claim and other papers
and documents as may be necessary or advisable in order to have the claims of the Trustee and of the holders of Securities of such series allowed for the entire amount due and payable by the Company under the Indenture at the date of institution of
such proceedings and for any additional amount that may become due and payable by the Company after such date, and to collect and receive any moneys or other property payable or deliverable on any such claim, and to distribute the same after the
deduction of the amount payable to the Trustee under Section 7.06; and any receiver, assignee or trustee in bankruptcy or reorganization is hereby authorized by each of the holders of Securities of such series to make such payments to the
Trustee, and, in the event that the Trustee shall consent to the making of such payments directly to such Securityholders, to pay to the Trustee any amount due it under Section 7.06. 

(d) All rights of action and of asserting claims under this Indenture, or under any of the terms established with respect to
Securities of that series, may be enforced by the Trustee without the possession of any of such Securities, or the production thereof at any trial or other proceeding relative thereto, and any such suit or proceeding instituted by the Trustee shall
be brought in its own name as trustee of an express trust, and any recovery of judgment shall, after provision for payment to the Trustee of any amounts due under Section 7.06, be for the ratable benefit of the holders of the Securities of such
series. 
 In case of an Event of Default hereunder, the Trustee may in its discretion proceed to protect and enforce the rights
vested in it by this Indenture by such appropriate judicial proceedings as the Trustee shall deem most 

  
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effectual to protect and enforce any of such rights, either at law or in equity or in bankruptcy or otherwise, whether for the specific enforcement of any covenant or agreement contained in the
Indenture or in aid of the exercise of any power granted in this Indenture, or to enforce any other legal or equitable right vested in the Trustee by this Indenture or by law. 
 Nothing contained herein shall be deemed to authorize the Trustee to authorize or consent to or accept or adopt on behalf of any Securityholder any plan of reorganization, arrangement, adjustment or
composition affecting the Securities of that series or the rights of any holder thereof or to authorize the Trustee to vote in respect of the claim of any Securityholder in any such proceeding. 

Section 6.03 Application of Moneys Collected. 

Any moneys collected by the Trustee pursuant to this Article with respect to a particular series of Securities shall be applied in the
following order, at the date or dates fixed by the Trustee and, in case of the distribution of such moneys on account of principal (or premium, if any) or interest, upon presentation of the Securities of that series, and notation thereon of the
payment, if only partially paid, and upon surrender thereof if fully paid: 
 FIRST: To the payment of reasonable costs and
expenses of collection and of all amounts payable to the Trustee under Section 7.06; 
 SECOND: To the payment of the
amounts then due and unpaid upon Securities of such series for principal (and premium, if any) and interest, in respect of which or for the benefit of which such money has been collected, ratably, without preference or priority of any kind,
according to the amounts due and payable on such Securities for principal (and premium, if any) and interest, respectively; and 

THIRD: To the payment of the remainder, if any, to the Company or any other Person lawfully entitled thereto. 

Section 6.04 Limitation on Suits. 
 No holder of any Security of any series shall have any right by virtue or by availing of any provision of this Indenture to institute any suit, action or proceeding in equity or at law upon or under or
with respect to this Indenture or for the appointment of a receiver or trustee, or for any other remedy hereunder, unless (i) such holder previously shall have given to the Trustee written notice of an Event of Default and of the continuance
thereof with respect to the Securities of such series specifying such Event of Default, as hereinbefore provided; (ii) the holders of not less than 25% in aggregate principal amount of the Securities of such series then Outstanding shall
have made written request upon the Trustee to institute such action, suit or proceeding in its own name as Trustee hereunder; (iii) such holder or holders shall have offered to the Trustee such reasonable indemnity as it may require against the
costs, expenses and liabilities to be incurred therein or thereby; (iv) the Trustee for 60 days after its receipt of such notice, request and offer of indemnity, shall have failed to institute any such action, suit or proceeding and
(v) during such 60 day period, the holders of a majority in principal amount of the Securities of that series do not give the Trustee a direction inconsistent with the request. 

Notwithstanding anything contained herein to the contrary or any other provisions of this Indenture, the right of any holder of any
Security to receive payment of the principal of (and premium, if any) and interest on such Security, as therein provided, on or after the respective due dates expressed in such Security (or in the case of redemption, on the redemption date), or to
institute suit for the enforcement of any such payment on or after such respective dates or redemption date, shall not be impaired or affected without the consent of such holder and by accepting a Security hereunder it is expressly understood,
intended and covenanted by the taker and holder of every Security of such series with every other such taker and holder and the Trustee, that no one or more holders of Securities of such series shall have any right in any manner whatsoever by virtue
or by availing of any provision of this Indenture to affect, disturb or prejudice the rights of the holders of any other of such Securities, or to obtain or seek to obtain priority over or preference to any other such holder, or to enforce any right
under this Indenture, except in the manner herein provided and for the equal, ratable and common benefit of all holders of Securities of such series. For the protection and enforcement of the provisions of this Section, each and every Securityholder
and the Trustee shall be entitled to such relief as can be given either at law or in equity. 

  
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 Section 6.05 Rights and Remedies Cumulative; Delay or Omission Not Waiver.

 (a) Except as otherwise provided in Section 2.07, all powers and remedies given by this Article to the
Trustee or to the Securityholders shall, to the extent permitted by law, be deemed cumulative and not exclusive of any other powers and remedies available to the Trustee or the holders of the Securities, by judicial proceedings or otherwise, to
enforce the performance or observance of the covenants and agreements contained in this Indenture or otherwise established with respect to such Securities. 
 (b) No delay or omission of the Trustee or of any holder of any of the Securities to exercise any right or power accruing upon any Event of Default occurring and continuing as aforesaid shall
impair any such right or power, or shall be construed to be a waiver of any such default or an acquiescence therein; and, subject to the provisions of Section 6.04, every power and remedy given by this Article or by law to the Trustee or the
Securityholders may be exercised from time to time, and as often as shall be deemed expedient, by the Trustee or by the Securityholders. 
 Section 6.06 Control by Securityholders. 
 The holders of a
majority in aggregate principal amount of the Securities of any series at the time Outstanding, determined in accordance with Section 8.04, shall have the right to direct the time, method and place of conducting any proceeding for any remedy
available to the Trustee, or exercising any trust or power conferred on the Trustee with respect to such series; provided, however, that such direction shall not be in conflict with any rule of law or with this Indenture. Subject to the provisions
of Section 7.01, the Trustee shall have the right to decline to follow any such direction if the Trustee in good faith shall, by a Responsible Officer or officers of the Trustee, determine that the proceeding so directed, subject to the
Trustee’s duties under the Trust Indenture Act, would involve the Trustee in personal liability or might be unduly prejudicial to the Securityholders not involved in the proceeding. The holders of a majority in aggregate principal amount of the
Securities of any series at the time Outstanding affected thereby, determined in accordance with Section 8.04, may on behalf of the holders of all of the Securities of such series waive any past default in the performance of any of the
covenants contained herein or established pursuant to Section 2.01 with respect to such series and its consequences, except a default in the payment of the principal of, or premium, if any, or interest on, any of the Securities of that series
as and when the same shall become due by the terms of such Securities otherwise than by acceleration (unless such default has been cured and a sum sufficient to pay all matured installments of interest and principal and any premium has been
deposited with the Trustee (in accordance with Section 6.01(c)). Upon any such waiver, the default covered thereby shall be deemed to be cured for all purposes of this Indenture and the Company, the Trustee and the holders of the Securities of
such series shall be restored to their former positions and rights hereunder, respectively; but no such waiver shall extend to any subsequent or other default or impair any right consequent thereon. 

Section 6.07 Undertaking to Pay Costs. 
 All parties to this Indenture agree, and each holder of any Securities by such holder’s acceptance thereof shall be deemed to have agreed, that any court may in its discretion require, 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, the filing by any party litigant in such suit of an undertaking to pay the costs of such suit, and
that such court may in its discretion assess reasonable costs, including reasonable attorneys’ fees, against any party litigant in such suit, having due regard to the merits and good faith of the claims or defenses made by such party litigant;
but the provisions of this Section shall not apply to any suit instituted by the Trustee, to any suit instituted by any Securityholder, or group of Securityholders, holding more than 10% in aggregate principal amount of the Outstanding
Securities of any series, or to any suit instituted by any Securityholder for the enforcement of the payment of the principal of (or premium, if any) or interest on any Security of such series, on or after the respective due dates expressed in such
Security or established pursuant to this Indenture. 

  
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 ARTICLE 7 
 CONCERNING THE TRUSTEE 
 Section 7.01 Certain Duties and
Responsibilities of Trustee. 
 (a) The Trustee, prior to the occurrence of an Event of Default with respect
to the Securities of a series and after the curing of all Events of Default with respect to the Securities of that series that may have occurred, shall undertake to perform with respect to the Securities of such series such duties and only such
duties as are specifically set forth in this Indenture, and no implied covenants shall be read into this Indenture against the Trustee. In case an Event of Default with respect to the Securities of a series has occurred (that has not been cured or
waived), the Trustee shall exercise with respect to Securities of that series such of the rights and powers vested in it by this Indenture, and use the same degree of care and skill in their exercise, as a prudent man would exercise or use under the
circumstances in the conduct of his own affairs. 
 (b) No provision of this Indenture shall be construed to relieve the
Trustee from liability for its own negligent action, its own negligent failure to act, or its own willful misconduct, except that: 
 (i) prior to the occurrence of an Event of Default with respect to the Securities of a series and after the curing or waiving of all such Events of Default with respect to that series that may have
occurred: 
 (A) the duties and obligations of the Trustee shall with respect to the Securities of such series be determined
solely by the express provisions of this Indenture, and the Trustee shall not be liable with respect to the Securities of such series except for the performance of such duties and obligations as are specifically set forth in this Indenture, and no
implied covenants or obligations shall be read into this Indenture against the Trustee; and 
 (B) in the absence of bad faith
on the part of the Trustee, the Trustee may with respect to the Securities of such series conclusively rely, as to the truth of the statements and the correctness of the opinions expressed therein, upon any certificates or opinions furnished to the
Trustee and conforming to the requirements of this Indenture; but in the case of any such certificates or opinions that by any provision hereof are specifically required to be furnished to the Trustee, the Trustee shall be under a duty to examine
the same to determine whether or not they conform to the requirements of this Indenture; 
 (ii) the Trustee shall not be liable
for any error of judgment made in good faith by a Responsible Officer or Responsible Officers of the Trustee, unless it shall be proved that the Trustee was negligent in ascertaining the pertinent facts; 

(iii) the Trustee shall not be liable with respect to any action taken or omitted to be taken by it in good faith in accordance with the
direction of the holders of not less than a majority in principal amount of the Securities of any series at the time Outstanding relating to the time, method and place of conducting any proceeding for any remedy available to the Trustee, or
exercising any trust or power conferred upon the Trustee under this Indenture with respect to the Securities of that series; and 
 (iv) No provision of this Indenture shall require the Trustee to risk its own funds or otherwise incur any financial liability in the performance of any of its duties, or in the exercise of any of its
rights or powers, if it shall have reasonable grounds for believing that repayment of such funds or adequate indemnity against such risk is not reasonably assured to it. 
 (c) The Trustee will not be liable for interest on any money received by it except as the Trustee may agree in writing with the Company. Money held in trust by the Trustee need not be segregated
from other funds except to the extent required by law. 
 Section 7.02 Certain Rights of Trustee. 

Except as otherwise provided in Section 7.01: 
 (a) The Trustee may rely and shall be protected in acting or refraining from acting upon any resolution, certificate, statement, instrument, opinion, report, notice, request, consent, order,
approval, bond, security or other paper or document believed by it to be genuine and to have been signed or presented by the proper party or parties and the Trustee need not investigate any fact or matter stated; 

  
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 (b) Any request, direction, order or demand of the Company mentioned herein shall be
sufficiently evidenced by a Board Resolution or an instrument signed in the name of the Company by any authorized officer of the Company (unless other evidence in respect thereof is specifically prescribed herein); 

(c) The Trustee may consult with counsel and the written advice of such counsel or any Opinion of Counsel shall be full and
complete authorization and protection in respect of any action taken or suffered or omitted hereunder in good faith and in reliance thereon; 
 (d) The Trustee shall be under no obligation to exercise any of the rights or powers vested in it by this Indenture at the request, order or direction of any of the Securityholders pursuant to the
provisions of this Indenture, unless such Securityholders shall have offered to the Trustee reasonable security or indemnity against the costs, expenses and liabilities that may be incurred therein or thereby; nothing contained herein shall,
however, relieve the Trustee of the obligation, upon the occurrence of an Event of Default with respect to a series of the Securities (that has not been cured or waived), to exercise with respect to Securities of that series such of the rights and
powers vested in it by this Indenture, and to use the same degree of care and skill in their exercise, as a prudent man would exercise or use under the circumstances in the conduct of his own affairs; 

(e) Any permissive right or authority granted to the Trustee shall not be construed as a mandatory duty; 

(f) The Trustee shall not be liable for any action taken or omitted to be taken by it in good faith and believed by it to be
authorized or within the discretion or rights or powers conferred upon it by this Indenture; 
 (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, consent, order, approval, bond, security, or other papers or documents, unless requested in
writing so to do by the holders of not less than a majority in principal amount of the Outstanding Securities of the particular series affected thereby (determined as provided in Section 8.04); provided, however, that if the payment within a
reasonable time to the Trustee of the costs, expenses or liabilities likely to be incurred by it in the making of such investigation is, in the opinion of the Trustee, not reasonably assured to the Trustee by the security afforded to it by the terms
of this Indenture, the Trustee may require reasonable indemnity against such costs, expenses or liabilities as a condition to so proceeding. The reasonable expense of every such examination shall be paid by the Company or, if paid by the Trustee,
shall be repaid by the Company upon demand; 
 (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 rights, privileges, protections, immunities and benefits given to the Trustee, including, its right to be compensated,
reimbursed, and indemnified, and its right to resign, are extended to, and shall be enforceable by the Trustee, including but not limited to its capacities as Paying Agent and Security Registrar and to each agent, custodian and other Person employed
to act hereunder; 
 (j) 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 Officer’s Certificate, including any
person specified as so authorized in any such certificate previously delivered and not superseded; and 
 (k) In no event
shall the Trustee be responsible or liable for special, indirect, punitive or consequential loss or damage of any kind whatsoever (including, but not limited to, loss or profit) irrespective of whether the Trustee has been advised of the likelihood
of such loss or damage and regardless of the form of action. 

  
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 In addition, the Trustee shall not be deemed to have knowledge of any Default or Event of
Default except (1) any Event of Default occurring pursuant to Sections 6.01(a)(1) and 6.01(a)(2) or (2) any Default or Event of Default of which the Trustee shall have received written notification in the manner set
forth in this Indenture or a Responsible Officer of the Trustee shall have obtained actual knowledge. Delivery of reports, information and documents to the Trustee under Section 5.03 is for informational purposes only and the information and
the Trustee’s receipt of the foregoing shall not constitute constructive notice of any information contained therein, or determinable from information contained therein including the Company’s compliance with any of their covenants
thereunder (as to which the Trustee is entitled to rely exclusively on an Officers’ Certificate). 
 Section 7.03
Trustee Not Responsible for Recitals or Issuance or Securities. 
 (a) The recitals contained herein and in
the Securities shall be taken as the statements of the Company, and the Trustee assumes no responsibility for the correctness of the same. 
 (b) The Trustee makes no representations as to the validity or sufficiency of this Indenture or of the Securities. 
 (c) The Trustee shall not be accountable for the use or application by the Company of any of the Securities or of the proceeds of such Securities, or for the use or application of any moneys paid
over by the Trustee in accordance with any provision of this Indenture or established pursuant to Section 2.01, or for the use or application of any moneys received by any paying agent other than the Trustee. 

Section 7.04 May Hold Securities. 
 The Trustee or any paying agent or Security Registrar, in its individual or any other capacity, may become the owner or pledgee of Securities with the same rights it would have if it were not Trustee,
paying agent or Security Registrar. 
 Section 7.05 Moneys Held in Trust. 

Subject to the provisions of Section 11.05, all moneys received by the Trustee shall, until used or applied as herein provided, be
held in trust for the purposes for which they were received, but need not be segregated from other funds except to the extent required by law. The Trustee shall be under no liability for interest on any moneys received by it hereunder except such as
it may agree with the Company to pay thereon. 
 Section 7.06 Compensation and Reimbursement. 

(a) The Company covenants and agrees to pay to the Trustee, and the Trustee shall be entitled to, such reasonable compensation
(which shall not be limited by any provision of law in regard to the compensation of a trustee of an express trust) as the Company and the Trustee may from time to time agree in writing, for all services rendered by it in the execution of the trusts
hereby created and in the exercise and performance of any of the powers and duties hereunder of the Trustee, and, except as otherwise expressly provided herein, the Company will pay or reimburse the Trustee upon its request for all reasonable
expenses, disbursements and advances incurred or made by the Trustee in accordance with any of the provisions of this Indenture (including the reasonable compensation and the expenses and disbursements of its counsel and of all Persons not regularly
in its employ), except any such expense, disbursement or advance as may arise from its negligence or bad faith and except as the Company and Trustee may from time to time agree in writing. The Company also covenants to indemnify the Trustee (and its
officers, agents, directors and employees) for, and to hold it harmless against, any loss, liability or expense incurred without negligence or bad faith on the part of the Trustee and arising out of or in connection with the acceptance or
administration of this trust, including the reasonable costs and expenses of defending itself against any claim of liability in the premises. 
 (b) The obligations of the Company under this Section to compensate and indemnify the Trustee and to pay or reimburse the Trustee for reasonable expenses, disbursements and advances shall
constitute additional indebtedness hereunder. Such additional indebtedness shall be secured by a lien prior to that of the Securities upon 

  
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all property and funds held or collected by the Trustee as such, except funds held in trust for the benefit of the holders of particular Securities. The obligations of the Company will survive
the satisfaction and discharge of this Indenture or earlier resignation or removal of the Trustee. 
 Section 7.07
Reliance on Officers’ Certificate. 
 Except as otherwise provided in Section 7.01, whenever in the
administration of the provisions of this Indenture the Trustee shall deem it reasonably necessary or desirable that a matter be proved or established prior to taking or suffering or omitting to take any action hereunder, such matter (unless other
evidence in respect thereof be herein specifically prescribed) may, in the absence of negligence or bad faith on the part of the Trustee, be deemed to be conclusively proved and established by an Officers’ Certificate delivered to the Trustee
and such certificate, in the absence of negligence or bad faith on the part of the Trustee, shall be full warrant to the Trustee for any action taken, suffered or omitted to be taken by it under the provisions of this Indenture upon the faith
thereof. 
 Section 7.08 Disqualification; Conflicting Interests. 

If the Trustee has or shall acquire any “conflicting interest” within the meaning of Section 310(b) of the Trust
Indenture Act, the Trustee and the Company shall in all respects comply with the provisions of Section 310(b) of the Trust Indenture Act. 
 Section 7.09 Corporate Trustee Required; Eligibility. 
 There
shall at all times be a Trustee with respect to the Securities issued hereunder which shall at all times be a corporation organized and doing business under the laws of the United States of America or any state or territory thereof or of the
District of Columbia, or a corporation or other Person permitted to act as trustee by the Securities and Exchange Commission, authorized under such laws to exercise corporate trust powers, having a combined capital and surplus of at least fifty
million U.S. dollars ($50,000,000), and subject to supervision or examination by federal, state, territorial, or District of Columbia authority. 
 If such corporation or other Person publishes reports of condition at least annually, pursuant to law or to the requirements of the aforesaid supervising or examining authority, then for the purposes of
this Section, the combined capital and surplus of such corporation or other Person shall be deemed to be its combined capital and surplus as set forth in its most recent report of condition so published. The Company may not, nor may any Person
directly or indirectly controlling, controlled by, or under common control with the Company, serve as Trustee. In case at any time the Trustee shall cease to be eligible in accordance with the provisions of this Section, the Trustee shall resign
immediately in the manner and with the effect specified in Section 7.10. 
 Section 7.10 Resignation and Removal;
Appointment of Successor. 
 (a) The Trustee or any successor hereafter appointed may at any time resign with
respect to the Securities of one or more series by giving written notice thereof to the Company and by transmitting notice of resignation by mail, first class postage prepaid, to the Securityholders of such series, as their names and addresses
appear upon the Security Register. Upon receiving such notice of resignation, the Company shall promptly appoint a successor trustee with respect to Securities of such series by written instrument, in duplicate, executed by order of the Board of
Directors, one copy of which instrument shall be delivered to the resigning Trustee and one copy to the successor trustee. If no successor trustee shall have been so appointed and have accepted appointment within 30 days after the mailing
of such notice of resignation, the resigning Trustee may petition any court of competent jurisdiction for the appointment of a successor trustee with respect to Securities of such series, or any Securityholder of that series who has been a bona fide
holder of a Security or Securities for at least six months may on behalf of himself and all others similarly situated, petition any such court for the appointment of a successor trustee. Such court may thereupon after such notice, if any, as it may
deem proper and prescribe, appoint a successor trustee. 
 (b) In case at any time any one of the following shall occur:

 (i) the Trustee shall fail to comply with the provisions of Section 7.08 after written request therefor by the Company
or by any Securityholder who has been a bona fide holder of a Security or Securities for at least six months; or 

  
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 (ii) the Trustee shall cease to be eligible in accordance with the provisions of
Section 7.09 and shall fail to resign after written request therefor by the Company or by any such Securityholder; or 

(iii) the Trustee shall become incapable of acting, or shall be adjudged a bankrupt or insolvent, or commence a voluntary bankruptcy
proceeding, or a receiver of the Trustee or of its property shall be appointed or consented to, or any public officer shall take charge or control of the Trustee or of its property or affairs for the purpose of rehabilitation, conservation or
liquidation; then, in any such case, the Company may remove the Trustee with respect to all Securities and appoint a successor trustee by written instrument, in duplicate, executed by order of the Board of Directors, one copy of which instrument
shall be delivered to the Trustee so removed and one copy to the successor trustee, or any Securityholder who has been a bona fide holder of a Security or Securities for at least six months may, on behalf of that holder and all others similarly
situated, petition any court of competent jurisdiction for the removal of the Trustee and the appointment of a successor trustee. Such court may thereupon after such notice, if any, as it may deem proper and prescribe, remove the Trustee and appoint
a successor trustee. 
 (c) The holders of a majority in aggregate principal amount of the Securities of any series at
the time Outstanding may at any time remove the Trustee with respect to such series by so notifying the Trustee and the Company and may appoint a successor Trustee for such series with the consent of the Company. 

(d) Any resignation or removal of the Trustee and appointment of a successor trustee with respect to the Securities of a series
pursuant to any of the provisions of this Section shall become effective upon acceptance of appointment by the successor trustee as provided in Section 7.11. 
 (e) Any successor trustee appointed pursuant to this Section may be appointed with respect to the Securities of one or more series or all of such series, and at any time there shall be only one
Trustee with respect to the Securities of any particular series. 
 (f) Appointment of a successor Trustee will become
effective only upon the successor Trustee’s acceptance of appointment as provided in this Section. 
 Section 7.11
Acceptance of Appointment By Successor. 
 (a) In case of the appointment hereunder of a successor trustee
with respect to all Securities, every such successor trustee so appointed shall execute, acknowledge and deliver to the Company and to the retiring Trustee an instrument accepting such appointment, and thereupon the resignation or removal of the
retiring Trustee shall become effective and such successor trustee, without any further act, deed or conveyance, shall become vested with all the rights, powers, trusts and duties of the retiring Trustee; but, on the request of the Company or the
successor trustee, such retiring Trustee shall, upon payment of its charges, execute and deliver an instrument transferring to such successor trustee all the rights, powers, and trusts of the retiring Trustee and shall duly assign, transfer and
deliver to such successor trustee all property and money held by such retiring Trustee hereunder. 
 (b) In case of the
appointment hereunder of a successor trustee with respect to the Securities of one or more (but not all) series, the Company, the retiring Trustee and each successor trustee with respect to the Securities of one or more series shall execute and
deliver an indenture supplemental hereto wherein each successor trustee shall accept such appointment and which (i) shall contain such provisions as shall be necessary or desirable to transfer and confirm to, and to vest in, each successor
trustee all the rights, powers, trusts and duties of the retiring Trustee with respect to the Securities of that or those series to which the appointment of such successor trustee relates, (ii) shall contain such provisions as shall be deemed
necessary or desirable to confirm that all the rights, powers, trusts and duties of the retiring Trustee with respect to the Securities of that or those series as to which the retiring Trustee is not retiring shall continue to be vested in the
retiring Trustee, and (iii) shall add to or change any of the provisions of this Indenture as shall be necessary to provide for or facilitate the administration of the trusts hereunder by more than one Trustee, it being understood that nothing
herein or in such supplemental indenture shall 

  
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constitute such Trustees co-trustees of the same trust, that each such Trustee shall be trustee of a trust or trusts hereunder separate and apart from any trust or trusts hereunder administered
by any other such Trustee and that no Trustee shall be responsible for any act or failure to act on the part of any other Trustee hereunder; and upon the execution and delivery of such supplemental indenture the resignation or removal of the
retiring Trustee shall become effective to the extent provided therein, such retiring Trustee shall with respect to the Securities of that or those series to which the appointment of such successor trustee relates have no further responsibility for
the exercise of rights and powers or for the performance of the duties and obligations vested in the Trustee under this Indenture, and each such successor trustee, without any further act, deed or conveyance, shall become vested with all the rights,
powers, trusts and duties of the retiring Trustee with respect to the Securities of that or those series to which the appointment of such successor trustee relates; but, on request of the Company or any successor trustee, such retiring Trustee shall
duly assign, transfer and deliver to such successor trustee, to the extent contemplated by such supplemental indenture, the property and money held by such retiring Trustee hereunder with respect to the Securities of that or those series to which
the appointment of such successor trustee relates. 
 (c) Upon request of any such successor trustee, the Company shall
execute any and all instruments for more fully and certainly vesting in and confirming to such successor trustee all such rights, powers and trusts referred to in paragraph (a) or (b) of this Section, as the case may be. 

(d) No successor trustee shall accept its appointment unless at the time of such acceptance such successor trustee shall be
qualified and eligible under this Article. 
 (e) Upon acceptance of appointment by a successor trustee as provided in
this Section, the Company shall transmit notice of the succession of such trustee hereunder by mail, first class postage prepaid, to the Securityholders, as their names and addresses appear upon the Security Register. If the Company fails to
transmit such notice within ten days after acceptance of appointment by the successor trustee, the successor trustee shall cause such notice to be transmitted at the expense of the Company. 

Section 7.12 Merger, Conversion, Consolidation or Succession to Business. 

Any corporation into which the Trustee may be merged or converted or with which it may be consolidated, or any corporation resulting from
any merger, conversion or consolidation to which the Trustee shall be a party, or any corporation succeeding to the corporate trust business of the Trustee, including the administration of the trust created by this Indenture, shall be the successor
of the Trustee hereunder, provided that such corporation shall be qualified under the provisions of Section 7.08 and eligible under the provisions of Section 7.09, without the execution or filing of any paper or any further act on the part
of any of the parties hereto, anything herein to the contrary notwithstanding. In case any Securities shall have been authenticated, but not delivered, by the Trustee then in office, any successor by merger, conversion or consolidation to such
authenticating Trustee may adopt such authentication and deliver the Securities so authenticated with the same effect as if such successor Trustee had itself authenticated such Securities. 

Section 7.13 Preferential Collection of Claims Against the Company. 

The Trustee shall comply with Section 311(a) of the Trust Indenture Act, excluding any creditor relationship described in
Section 311(b) of the Trust Indenture Act. A Trustee who has resigned or been removed shall be subject to Section 311(a) of the Trust Indenture Act to the extent included therein. 

Section 7.14 Notice of Default 
 If any Default or any Event of Default occurs and is continuing and if such Default or Event of Default is actually known to a Responsible Officer of the Trustee, the Trustee shall mail to each
Securityholder in the manner and to the extent provided in Section 313(c) of the Trust Indenture Act notice of the Default or Event of Default within 45 days after it occurs, unless such Default or Event of Default has been
cured; provided, however, that, except in the case of a default in the payment of the principal of (or premium, if any) or interest on any Security, the Trustee shall be protected in withholding such notice if and so long as the board of
directors, the executive committee or a trust committee of directors and/or Responsible Officers of the Trustee in good faith determine that the withholding of such notice is in the interest of the Securityholders. 

  
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 ARTICLE 8 
 CONCERNING THE SECURITYHOLDERS 
 Section 8.01 Evidence of Action by
Securityholders. 
 Whenever in this Indenture it is provided that the holders of a majority or specified percentage
in aggregate principal amount of the Securities of a particular series may take any action (including the making of any demand or request, the giving of any notice, consent or waiver or the taking of any other action), the fact that at the time of
taking any such action the holders of such majority or specified percentage of that series have joined therein may be evidenced by any instrument or any number of instruments of similar tenor executed by such holders of Securities of that series in
person or by agent or proxy appointed in writing. 
 If the Company shall solicit from the Securityholders of any series any
request, demand, authorization, direction, notice, consent, waiver or other action, the Company may, at its option, as evidenced by an Officers’ Certificate, fix in advance a record date for such series for the determination of Securityholders
entitled to give such request, demand, authorization, direction, notice, consent, waiver or other action, 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 action may be given before or after the record date, but only the Securityholders of record at the close of business on the record date shall be deemed to be Securityholders for the purposes of determining whether
Securityholders of the requisite proportion of Outstanding Securities of that series have authorized or agreed or consented to such request, demand, authorization, direction, notice, consent, waiver or other action, and for that purpose the
Outstanding Securities of that series shall be computed as of the record date; provided, however, that no such authorization, agreement or consent by such Securityholders on the record date shall be deemed effective unless it shall become effective
pursuant to the provisions of this Indenture not later than six months after the record date. 
 Section 8.02 Proof of
Execution by Securityholders. 
 Subject to the provisions of Section 7.01, proof of the execution of any
instrument by a Securityholder (such proof will not require notarization) or his agent or proxy and proof of the holding by any Person of any of the Securities shall be sufficient if made in the following manner: 

(a) The fact and date of the execution by any such Person of any instrument may be proved in any reasonable manner acceptable to
the Trustee. 
 (b) The ownership of Securities shall be proved by the Security Register of such Securities or by a
certificate of the Security Registrar thereof. The Trustee may require such additional proof of any matter referred to in this Section as it shall deem necessary. 
 Section 8.03 Who May be Deemed Owners. 
 Prior to the due
presentment for registration of transfer of any Security, the Company, the Trustee, any paying agent and any Security Registrar may deem and treat the Person in whose name such Security shall be registered upon the books of the Company as the
absolute owner of such Security (whether or not such Security shall be overdue and notwithstanding any notice of ownership or writing thereon made by anyone other than the Security Registrar) for the purpose of receiving payment of or on account of
the principal of, premium, if any, and (subject to Section 2.03) interest on such Security and for all other purposes; and neither the Company nor the Trustee nor any paying agent nor any Security Registrar shall be affected by any notice to
the contrary. 

  
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 Section 8.04 Certain Securities Owned by Company Disregarded. 

In determining whether the holders of the requisite aggregate principal amount of Securities of a particular series have concurred in any
direction, consent or waiver under this Indenture, the Securities of that series that are owned by the Company or any other obligor on the Securities of that series or by any Person directly or indirectly controlling or controlled by or under common
control with the Company or any other obligor on the Securities of that series shall be disregarded and deemed not to be Outstanding for the purpose of any such determination, except that for the purpose of determining whether the Trustee shall be
protected in relying on any such direction, consent or waiver, only Securities of such series that the Trustee actually knows are so owned shall be so disregarded. The Securities so owned that have been pledged in good faith may be regarded as
Outstanding for the purposes of this Section, if the pledgee shall establish to the satisfaction of the Trustee the pledgee’s right so to act with respect to such Securities and that the pledgee is not a Person directly or indirectly
controlling or controlled by or under direct or indirect common control with the Company or any such other obligor. In case of a dispute as to such right, any decision by the Trustee taken upon the advice of counsel shall be full protection to the
Trustee. 
 Section 8.05 Actions Binding on Future Securityholders. 

At any time prior to (but not after) the evidencing to the Trustee, as provided in Section 8.01, of the taking of any action by the
holders of the majority or percentage in aggregate principal amount of the Securities of a particular series specified in this Indenture in connection with such action, any holder of a Security of that series that is shown by the evidence to be
included in the Securities the holders of which have consented to such action may, by filing written notice with the Trustee, and upon proof of holding as provided in Section 8.02, revoke such action so far as concerns such Security. Except as
aforesaid any such action taken by the holder of any Security shall be conclusive and binding upon such holder and upon all future holders and owners of such Security, and of any Security issued in exchange therefor, on registration of transfer
thereof or in place thereof, irrespective of whether or not any notation in regard thereto is made upon such Security. Any action taken by the holders of the majority or percentage in aggregate principal amount of the Securities of a particular
series specified in this Indenture in connection with such action shall be conclusively binding upon the Company, the Trustee and the holders of all the Securities of that series. 

ARTICLE 9 

SUPPLEMENTAL INDENTURES 
 Section 9.01 Supplemental Indentures Without the Consent of Securityholders. 
 In addition to any supplemental indenture otherwise authorized by this Indenture, the Company and the Trustee may from time to time and at any time enter into an indenture or indentures supplemental
hereto (which shall conform to the provisions of the Trust Indenture Act as then in effect), without the consent of the Securityholders, for one or more of the following purposes: 

(a) to cure any ambiguity, defect, or inconsistency herein or in the Securities of any series; 

(b) to comply with Article Ten; 
 (c) to provide for uncertificated Securities in addition to or in place of certificated Securities; 
 (d) to add to the covenants, restrictions, conditions or provisions relating to the Company for the benefit of the holders of all or any series of Securities (and if such covenants, restrictions,
conditions or provisions are to be for the benefit of less than all series of Securities, stating that such covenants, restrictions, conditions or provisions are expressly being included solely for the benefit of such series), to make the
occurrence, or the occurrence and the continuance, of a default in any such additional covenants, restrictions, conditions or provisions an Event of Default, or to surrender any right or power herein conferred upon the Company; 

(e) to add to, delete from, or revise the conditions, limitations, and restrictions on the authorized amount, terms, or purposes
of issue, authentication, and delivery of Securities, as herein set forth; 

  
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 (f) to make any change that does not adversely affect the rights of any
Securityholder in any material respect; 
 (g) to provide for the issuance of and establish the form and terms and
conditions of the Securities of any series as provided in Section 2.01, to establish the form of any certifications required to be furnished pursuant to the terms of this Indenture or any series of Securities, or to add to the rights of the
holders of any series of Securities; 
 (h) to evidence and provide for the acceptance of appointment hereunder by a
successor trustee; or 
 (i) to comply with any requirements of the Securities and Exchange Commission or any successor
in connection with the qualification of this Indenture under the Trust Indenture Act. 
 The Trustee is hereby authorized to
join with the Company in the execution of any such supplemental indenture, and to make any further appropriate agreements and stipulations that may be therein contained, but the Trustee shall not be obligated to enter into any such supplemental
indenture that affects the Trustee’s own rights, duties or immunities under this Indenture or otherwise. 
 Any
supplemental indenture authorized by the provisions of this Section may be executed by the Company and the Trustee without the consent of the holders of any of the Securities at the time Outstanding, notwithstanding any of the provisions of
Section 9.02. 
 Section 9.02 Supplemental Indentures With Consent of Securityholders. 

With the consent (evidenced as provided in Section 8.01) of the holders of not less than a majority in aggregate principal amount of
the Securities of each series affected by such supplemental indenture or indentures at the time Outstanding, the Company, when authorized by a Board Resolution, and the Trustee may from time to time and at any time enter into an indenture or
indentures supplemental hereto (which shall conform to the provisions of the Trust Indenture Act as then in effect) for the purpose of adding any provisions to or changing in any manner or eliminating any of the provisions of this Indenture or of
any supplemental indenture or of modifying in any manner not covered by Section 9.01 the rights of the holders of the Securities of such series under this Indenture; provided, however, that no such supplemental indenture shall, without the
consent of the holders of each Security then Outstanding and affected thereby, 
 (i) extend the fixed maturity of any
Securities of any series, or reduce the principal amount thereof, or reduce the rate or extend the time of payment of interest thereon, 
 (ii) reduce any premium payable upon the redemption thereof or reduce the aforesaid percentage of Securities, the holders of which are required to consent to any such supplemental indenture; 

(iii) change any obligation to pay additional amounts; 
 (iv) reduce the amount of principal of an original issue discount security or any other Security payable upon acceleration of the maturity thereof; 

(v) change currency in which any Security or any premium or interest is payable; 

(vi) impair the right to enforce any payment on or with respect to any Security; 

(vii) adversely change the right to convert or exchange, including decreasing the conversion rate or increasing the conversion price of,
such Security (if applicable); 
 (viii) if the Securities are secured, change the terms and conditions pursuant to which the
Securities are secured in a manner adverse to the holders of the Securities; 

  
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 (ix) reduce the percentage in principal amount of outstanding Securities of any series, the
consent of whose holders is required for modification or amendment of the indenture or for waiver of compliance with certain provisions of the indenture or for waiver of certain defaults; 

(x) reduce the requirements contained in the indenture for quorum or voting; 

(xi) change any obligations of the Company to maintain an office or agency in the places and for the purposes required by the indentures;
or 
 (xii) modify any of the above provisions. 
 It shall not be necessary for the consent of the Securityholders of any series affected thereby under this Section to approve the particular form of any proposed supplemental indenture, but it shall be
sufficient if such consent shall approve the substance thereof. 
 Section 9.03 Effect of Supplemental
Indentures. 
 Upon the execution of any supplemental indenture pursuant to the provisions of this Article or of
Section 10.01, this Indenture shall, with respect to such series, be and be deemed to be modified and amended in accordance therewith and the respective rights, limitations of rights, obligations, duties and immunities under this Indenture of
the Trustee, the Company and the holders of Securities of the series affected thereby shall thereafter be determined, exercised and enforced hereunder subject in all respects to such modifications and amendments, and all the terms and conditions of
any such supplemental indenture shall be and be deemed to be part of the terms and conditions of this Indenture for any and all purposes. 
 Section 9.04 Securities Affected by Supplemental Indentures. 

Securities of any series affected by a supplemental indenture, authenticated and delivered after the execution of such supplemental
indenture pursuant to the provisions of this Article or of Section 10.01, may bear a notation in form approved by the Company, provided such form meets the requirements of any securities exchange upon which such series may be listed, as to any
matter provided for in such supplemental indenture. If the Company shall so determine, new Securities of that series so modified as to conform, in the opinion of the Board of Directors, to any modification of this Indenture contained in any such
supplemental indenture may be prepared by the Company, authenticated by the Trustee and delivered in exchange for the Securities of that series then Outstanding. 
 Section 9.05 Execution of Supplemental Indentures. 
 Upon the
request of the Company, accompanied by its Board Resolutions authorizing the execution of any such supplemental indenture, and upon the filing with the Trustee of evidence of the consent of Securityholders required to consent thereto as aforesaid,
the Trustee shall join with the Company in the execution of such supplemental indenture unless such supplemental indenture affects the Trustee’s own rights, duties or immunities under this Indenture or otherwise, in which case the Trustee may
in its discretion but shall not be obligated to enter into such supplemental indenture. The Trustee, subject to the provisions of Section 7.01, may receive an Officers’ Certificate or an Opinion of Counsel as conclusive evidence that any
supplemental indenture executed pursuant to this Article is authorized or permitted by, and conforms to, the terms of this Article and that it is proper for the Trustee under the provisions of this Article to join in the execution thereof; provided,
however, that such Officers’ Certificate or Opinion of Counsel need not be provided in connection with the execution of a supplemental indenture that establishes the terms of a series of Securities pursuant to Section 2.01 hereof.

 Promptly after the execution by the Company and the Trustee of any supplemental indenture pursuant to the provisions of this
Section, the Trustee shall transmit by mail, first class postage prepaid, a notice, setting forth in general terms the substance of such supplemental indenture, to the Securityholders of all series affected thereby as their names and addresses
appear upon the Security Register. Any failure of the Trustee to mail such notice, or any defect therein, shall not, however, in any way impair or affect the validity of any such supplemental indenture. 

  
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 ARTICLE 10 
 SUCCESSOR ENTITY 
 Section 10.01 Company May Consolidate,
Etc. 
 Except as provided pursuant to Section 2.01 pursuant to a Board Resolution, and set forth in an
Officers’ Certificate, or established in one or more indentures supplemental to this Indenture, nothing contained in this Indenture shall prevent any consolidation or merger of the Company with or into any other Person (whether or not
affiliated with the Company) or successive consolidations or mergers in which the Company or its successor or successors shall be a party or parties, or shall prevent any sale, conveyance, transfer or other disposition of the property of the Company
or its successor or successors as an entirety, or substantially as an entirety, to any other corporation (whether or not affiliated with the Company or its successor or successors) authorized to acquire and operate the same; provided, however,
(a) the Company hereby covenants and agrees that, upon any such consolidation or merger (in each case, if the Company is not the survivor of such transaction), sale, conveyance, transfer or other disposition, the due and punctual payment of the
principal of (premium, if any) and interest on all of the Securities of all series in accordance with the terms of each series, according to their tenor, and the due and punctual performance and observance of all the covenants and conditions of this
Indenture with respect to each series or established with respect to such series pursuant to Section 2.01 to be kept or performed by the Company shall be expressly assumed, by supplemental indenture (which shall conform to the provisions of the
Trust Indenture Act, as then in effect) reasonably satisfactory in form to the Trustee executed and delivered to the Trustee by the entity formed by such consolidation, or into which the Company shall have been merged, or by the entity which shall
have acquired such property and (b) in the event that the Securities of any series then Outstanding are convertible into or exchangeable for shares of common stock or other securities of the Company, such entity shall, by such supplemental
indenture, make provision so that the Securityholders of Securities of that series shall thereafter be entitled to receive upon conversion or exchange of such Securities the number of securities or property to which a holder of the number of shares
of common stock or other securities of the Company deliverable upon conversion or exchange of those Securities would have been entitled had such conversion or exchange occurred immediately prior to such consolidation, merger, sale, conveyance,
transfer or other disposition. 
 Section 10.02 Successor Entity Substituted. 

(a) In case of any such consolidation, merger, sale, conveyance, transfer or other disposition and upon the assumption by the
successor entity by supplemental indenture, executed and delivered to the Trustee and satisfactory in form to the Trustee, of the obligations set forth under Section 10.01 on all of the Securities of all series Outstanding, such successor
entity shall succeed to and be substituted for the Company with the same effect as if it had been named as the Company herein, and thereupon the predecessor corporation shall be relieved of all obligations and covenants under this Indenture and the
Securities. 
 (b) In case of any such consolidation, merger, sale, conveyance, transfer or other disposition, such
changes in phraseology and form (but not in substance) may be made in the Securities thereafter to be issued as may be appropriate. 
 (c) Nothing contained in this Article shall require any action by the Company in the case of a consolidation or merger of any Person into the Company where the Company is the survivor of such
transaction, or the acquisition by the Company, by purchase or otherwise, of all or any part of the property of any other Person (whether or not affiliated with the Company). 
 Section 10.03 Evidence of Consolidation, Etc. to Trustee. 
 The
Trustee, subject to the provisions of Section 7.01, may receive an Officers’ Certificate or an Opinion of Counsel as conclusive evidence that any such consolidation, merger, sale, conveyance, transfer or other disposition, and any such
assumption, comply with the provisions of this Article. 

  
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 ARTICLE 11 
 SATISFACTION AND DISCHARGE 
 Section 11.01 Satisfaction and
Discharge of Indenture. 
 If at any time: (a) the Company shall have delivered to the Trustee for cancellation
all Securities of a series theretofore authenticated and not delivered to the Trustee for cancellation (other than any Securities that shall have been destroyed, lost or stolen and that shall have been replaced or paid as provided in
Section 2.07 and Securities for whose payment money or Governmental Obligations have theretofore been deposited in trust or segregated and held in trust by the Company and thereupon repaid to the Company or discharged from such trust, as
provided in Section 11.05); or (b) all such Securities of a particular series not theretofore delivered to the Trustee for cancellation shall have become due and payable, or are by their terms to become due and payable within one year or
are to be called for redemption within one year under arrangements satisfactory to the Trustee for the giving of notice of redemption, and the Company shall deposit or cause to be deposited with the Trustee as trust funds the entire amount in moneys
or Governmental Obligations or a combination thereof, sufficient in the opinion of a nationally recognized firm of independent public accountants expressed in a written certification thereof delivered to the Trustee, to pay at maturity or upon
redemption all Securities of that series not theretofore delivered to the Trustee for cancellation, including principal (and premium, if any) and interest due or to become due to such date of maturity or date fixed for redemption, as the case may
be, and if the Company shall also pay or cause to be paid all other sums payable hereunder with respect to such series by the Company then this Indenture shall thereupon cease to be of further effect with respect to such series except for the
provisions of Sections 2.03, 2.05, 2.07, 4.01, 4.02, 4.03 and 7.10, that shall survive until the date of maturity or redemption date, as the case may be, and Sections 7.06 and 11.05, that shall survive to such date and
thereafter, and the Trustee, on demand of the Company and at the cost and expense of the Company shall execute proper instruments acknowledging satisfaction of and discharging this Indenture with respect to such series. 

Section 11.02 Discharge of Obligations. 
 If at any time all such Securities of a particular series not heretofore delivered to the Trustee for cancellation or that have not become due and payable as described in Section 11.01 shall have
been paid by the Company by depositing irrevocably with the Trustee as trust funds moneys or an amount of Governmental Obligations sufficient to pay at maturity or upon redemption all such Securities of that series not theretofore delivered to the
Trustee for cancellation, including principal (and premium, if any) and interest due or to become due to such date of maturity or date fixed for redemption, as the case may be, and if the Company shall also pay or cause to be paid all other sums
payable hereunder by the Company with respect to such series, then after the date such moneys or Governmental Obligations, as the case may be, are deposited with the Trustee the obligations of the Company under this Indenture with respect to such
series shall cease to be of further effect except for the provisions of Sections 2.03, 2.05, 2.07, 4,01, 4.02, 4,03, 7.06, 7.10 and 11.05 hereof that shall survive until such Securities shall mature and be paid. 

Thereafter, Sections 7.06 and 11.05 shall survive. 
 Section 11.03 Deposited Moneys to be Held in Trust. 
 All
moneys or Governmental Obligations deposited with the Trustee pursuant to Sections 11.01 or 11.02 shall be held in trust and shall be available for payment as due, either directly or through any paying agent (including the Company acting
as its own paying agent), to the holders of the particular series of Securities for the payment or redemption of which such moneys or Governmental Obligations have been deposited with the Trustee. 

Section 11.04 Payment of Moneys Held by Paying Agents. 

In connection with the satisfaction and discharge of this Indenture all moneys or Governmental Obligations then held by any paying agent
under the provisions of this Indenture shall, upon demand of the Company, be paid to the Trustee and thereupon such paying agent shall be released from all further liability with respect to such moneys or Governmental Obligations. 

  
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 Section 11.05 Repayment to Company. 

Any moneys or Governmental Obligations deposited with any paying agent or the Trustee, or then held by the Company, in trust for payment
of principal of or premium, if any, or interest on the Securities of a particular series that are not applied but remain unclaimed by the holders of such Securities for at least two years after the date upon which the principal of (and premium, if
any) or interest on such Securities shall have respectively become due and payable, or such other shorter period set forth in applicable escheat or abandoned or unclaimed property law, shall be repaid to the Company on May 31 of each year or
upon the Company’s request or (if then held by the Company) shall be discharged from such trust; and thereupon the paying agent and the Trustee shall be released from all further liability with respect to such moneys or Governmental
Obligations, and the holder of any of the Securities entitled to receive such payment shall thereafter, as a general creditor, look only to the Company for the payment thereof. 
 ARTICLE 12 
 IMMUNITY OF INCORPORATORS, 

STOCKHOLDERS, OFFICERS AND DIRECTORS 
 Section 12.01 No Recourse. 
 No recourse under or upon any
obligation, covenant or agreement of this Indenture, or of any Security, or for any claim based thereon or otherwise in respect thereof, shall be had against any incorporator, stockholder, officer or director, past, present or future as such, of the
Company or of any predecessor or successor corporation, either directly or through the Company or any such 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; it being expressly understood that this Indenture and the obligations issued hereunder are solely corporate obligations, and that no such personal liability whatever shall attach to, or is or shall be incurred by, the
incorporators, stockholders, officers or directors as such, of the Company or of any predecessor or successor corporation, or any of them, because of the creation of the indebtedness hereby authorized, or under or by reason of the obligations,
covenants or agreements contained in this Indenture or in any of the Securities or implied therefrom; and that any and all such personal liability of every name and nature, either at common law or in equity or by constitution or statute, of, and any
and all such rights and claims against, every such incorporator, stockholder, officer or director as such, because of the creation of the indebtedness hereby authorized, or under or by reason of the obligations, covenants or agreements contained in
this Indenture or in any of the Securities or implied therefrom, are hereby expressly waived and released as a condition of, and as a consideration for, the execution of this Indenture and the issuance of such Securities. 

ARTICLE 13 

MISCELLANEOUS PROVISIONS 
 Section 13.01 Effect on Successors and Assigns. 
 All the
covenants, stipulations, promises and agreements in this Indenture made by or on behalf of the Company shall bind its successors and assigns, whether so expressed or not. 
 Section 13.02 Actions by Successor. 
 Any act or proceeding by
any provision of this Indenture authorized or required to be done or performed by any board, committee or officer of the Company shall and may be done and performed with like force and effect by the corresponding board, committee or officer of any
corporation that shall at the time be the lawful successor of the Company. 

  
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 Section 13.03 Surrender of Company Powers. 

The Company by instrument in writing executed by authority of 2/3 (two-thirds) its Board of Directors and delivered to the Trustee
may surrender any of the powers reserved to the Company, and thereupon such power so surrendered shall terminate both as to the Company and as to any successor corporation. 
 Section 13.04 Notices. 
 Except as otherwise expressly provided
herein, any notice, request or demand that by any provision of this Indenture is required or permitted to be given, made or served by the Trustee or by the holders of Securities or by any other Person pursuant to this Indenture to or on the Company
may be given or served by being deposited in first class mail, postage prepaid, addressed (until another address is filed in writing by the Company with the Trustee), as follows: Gevo, Inc., 345 Inverness Drive South, Building C, Suite 310,
Englewood, Colorado 80112, Attn: Chief Financial Officer. Any notice, election, request or demand by the Company or any Securityholder or by any other Person pursuant to this Indenture to or upon the Trustee shall be deemed to have been
sufficiently given or made, for all purposes, if given or made in writing at the Corporate Trust Office of the Trustee. 

Section 13.05 Governing Law. 
 This Indenture and each Security shall be deemed to be a contract made under the internal laws of the State of New York, and for all purposes shall be construed in accordance with the laws of said State,
except to the extent that the Trust Indenture Act is applicable. 
 Section 13.06 Treatment of Securities as
Debt. 
 It is intended that the Securities will be treated as indebtedness and not as equity for federal income tax
purposes. The provisions of this Indenture shall be interpreted to further this intention. 
 Section 13.07 Certificates
and Opinions as to Conditions Precedent. 
 (a) Upon any application or demand by the Company to the Trustee
to take any action under any of the provisions of this Indenture, the Company shall furnish to the Trustee an Officers’ Certificate stating that all conditions precedent provided for in this Indenture (other than the certificate to be delivered
pursuant to Section 13.12) relating to the proposed action have been complied with and an Opinion of Counsel stating that in the opinion of such counsel all such conditions precedent have been complied with, except that in the case of any such
application or demand as to which the furnishing of such documents is specifically required by any provision of this Indenture relating to such particular application or demand, no additional certificate or opinion need be furnished. 

(b) Each certificate or opinion provided for in this Indenture and delivered to the Trustee with respect to compliance with a
condition or covenant in this Indenture shall include (i) a statement that the Person making such certificate or opinion has read such covenant or condition; (ii) a brief statement as to the nature and scope of the examination or
investigation upon which the statements or opinions contained in such certificate or opinion are based; (iii) a statement that, in the opinion of such Person, he has made such examination or investigation as is reasonably necessary to enable
him to express an informed opinion as to whether or not such covenant or condition has been complied with; and (iv) a statement as to whether or not, in the opinion of such Person, such condition or covenant has been complied with. 

Section 13.08 Payments on Business Days. 
 Except as provided pursuant to Section 2.01 pursuant to a Board Resolution, and set forth in an Officers’ Certificate, or established in one or more indentures supplemental to this Indenture, in
any case where the date of maturity of interest or principal of any Security or the date of redemption of any Security shall not be a Business Day, then payment of interest or principal (and premium, if any) may be made on the next succeeding
Business Day with the same force and effect as if made on the nominal date of maturity or redemption, and no interest shall accrue for the period after such nominal date. 

  
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 Section 13.09 Conflict with Trust Indenture Act. 

If and to the extent that any provision of this Indenture limits, qualifies or conflicts with the duties imposed by Sections 310
to 317, inclusive, of the Trust Indenture Act, such imposed duties shall control. 
 Section 13.10
Counterparts. 
 This Indenture may be executed in any number of counterparts, each of which shall be an original,
but such counterparts shall together constitute but one and the same instrument. 
 Section 13.11 Separability.

 In case any one or more of the provisions contained in this Indenture or in the Securities of any series shall for any
reason be held to be invalid, illegal or unenforceable in any respect, such invalidity, illegality or unenforceability shall not affect any other provisions of this Indenture or of such Securities, but this Indenture and such Securities shall be
construed as if such invalid or illegal or unenforceable provision had never been contained herein or therein. 

Section 13.12 Compliance Certificates. 
 The Company shall deliver to the Trustee, within 120 days after the end of each fiscal year during which any Securities of any series were outstanding, an officer’s certificate stating
whether or not the signers know of any Default or Event of Default that occurred during such fiscal year. Such certificate shall contain a certification from the principal executive officer, principal financial officer or principal accounting
officer of the Company that a review has been conducted of the activities of the Company and the Company’s performance under this Indenture and that the Company has complied with all conditions and covenants under this Indenture. For purposes
of this Section 13.12, such compliance shall be determined without regard to any period of grace or requirement of notice provided under this Indenture. If the officer of the Company signing such certificate has knowledge of such a Default or
Event of Default, the certificate shall describe any such Default or Event of Default and its status. 
 Section 13.13
U.S.A. Patriot Act. 
 The parties hereto acknowledge that in accordance with Section 326 of the U.S.A. Patriot
Act, the Trustee, like all financial institutions and in order to help fight the funding of terrorism and money laundering, is required to obtain, verify and record information that identifies each person or legal entity that establishes a
relationship or opens an account with the Trustee. The parties to this Indenture agree that they will provide the Trustee with such information as it may request in order for the Trustee to satisfy the requirements of the U.S.A. Patriot Act.

 Section 13.14 Force Majeure. 
 In no event shall the Trustee be responsible or liable for any failure or delay in the performance of its obligations hereunder arising out of or caused by, directly or indirectly, forces beyond its
control, including, without limitation, strikes, work stoppages, accidents, acts of war or terrorism, civil or military disturbances, nuclear or natural catastrophes or acts of God, and interruptions, loss or malfunctions of utilities,
communications or computer (software and hardware) services; it being understood that the Trustee shall be reasonable efforts which are consistent with accepted practices in the banking industry to resume performance as soon as practicable under the
circumstances. 

  
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 IN WITNESS WHEREOF, the parties hereto have caused this Indenture to be duly executed
all as of the day and year first above written. 
  

			
	GEVO, INC.
		
	By:	 	 /s/ Mark Smith

		 	Name: Mark Smith
		 	Title: Chief Financial Officer
	
	 WELLS FARGO BANK, NATIONAL ASSOCIATION
 As Trustee

		
	By:	 	 /s/ Michael Tu

		 	Name: Michael Tu
		 	Title: Assistant Vice President


 [SIGNATURE PAGE TO SENIOR DEBT SECURITIES] 







 CROSS-REFERENCE TABLE(1) 
  

					
	 Section of Trust Indenture
 Act of 1939, as Amended
	  	Section of Indenture	  	 
	310(a)	  	7.09	  	
	310(b)	  	7.08	  	
		  	7.10	  	
	310(c)	  	Inapplicable	  	
	311(a)	  	7.13	  	
	311(b)	  	7.13	  	
	311(c)	  	Inapplicable	  	
	312(a)	  	5.01	  	
		  	5.02(a)	  	
	312(b)	  	5.02(c)	  	
	312(c)	  	5.02(c)	  	
	313(a)	  	5.04(a)	  	
	313(b)	  	5.04(b)	  	
	313(c)	  	5.04(a)	  	
		  	5.04(b)	  	
	313(d)	  	5.04(c)	  	
	314(a)	  	5.03	  	
		  	13.12	  	
	314(b)	  	Inapplicable	  	
	314(c)	  	13.07(a)	  	
	314(d)	  	Inapplicable	  	
	314(e)	  	13.07(b)	  	
	314(f)	  	Inapplicable	  	
	315(a)	  	7.01(a)	  	
		  	7.01(b)	  	
	315(b)	  	7.14	  	
	315(c)	  	7.01	  	
	315(d)	  	7.01(b)	  	
	315(e)	  	6.07	  	
	316(a)	  	6.06	  	
		  	8.04	  	
	316(b)	  	6.04	  	
	316(c)	  	8.01	  	
	317(a)	  	6.02	  	
	317(b)	  	4.03	  	
	318(a)	  	13.09	  	

  

	(1)	This Cross-Reference Table does not constitute part of the Indenture and shall not have any bearing on the interpretation of any of its terms or provisions.



  
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