Document:

Lockbox Processing Agreement

 Exhibit 10.4 
 SERIES 2012-3 LOCKBOX PROCESSING AGREEMENT 
 Dated as of June 6, 2012

 Regulus Group II LLC (“Processor”), AmeriCredit Financial Services, Inc. (“AmeriCredit”)
and Wells Fargo Bank, National Association, as Trustee (the “Trustee”), agree as follows: 
 1. Servicing
Arrangements. AmeriCredit, as Servicer (the “Servicer”), AFS SenSub Corp., as Seller (“Seller”), AmeriCredit Automobile Receivables Trust 2012-3 (the “Trust”) and the Trustee entered into a Sale
and Servicing Agreement dated as of June 6, 2012 (as amended, supplemented and otherwise modified from time to time, the “Sale and Servicing Agreement”), relating to the Receivables (as such term is defined in the Sale and
Servicing Agreement), pursuant to which the Receivables were sold, transferred, assigned, or otherwise conveyed to the Trust. The Sale and Servicing Agreement contemplates the engagement of a processor for lockbox services, and the Indenture
contemplates that the Lockbox Account (as defined herein) will be assigned and pledged to the Trust Collateral Agent. The Sale and Servicing Agreement does not include specific terms for the provision of data processing services of remittance items.
Such terms are set forth in this Lockbox Processing Agreement (the “Agreement”). For avoidance of doubt, Processor is not a depository institution. All capitalized terms used herein and not otherwise defined herein shall have the
meanings specified in the Sale and Servicing Agreement. 
 2. Remittance Processing Services. In order to provide a means
of collection of the Receivables which will allow the Trustee to receive the proceeds of the Receivables and related security without AmeriCredit or its Affiliates having access to the funds, the parties hereto agree for the benefit of the Trustee
that the processing services (the “Service(s)”) of Processor will be used for the collection and the deposit of remittances related to the Receivables and related security. 

3. Customer Remittances. Obligors of the Receivables will be directed by AmeriCredit to forward their remittances to Processor at
a post office address (the “Lockbox”) assigned by Processor. Processor, acting for the exclusive benefit of the Trustee, shall have unrestricted and exclusive access to the mail directed to this address. AmeriCredit agrees to notify
Processor thirty (30) days in advance of any change in Obligor remittance statements and/or mailing schedule. 
 4.
Collection of Mail. Processor will collect mail from the Lockbox at regular intervals each business day, but not less than two times daily. 
 5. Endorsement of Items. Processor will process, on behalf of AmeriCredit, checks and other deposited items that appear to be for deposit to the credit of AmeriCredit or its Affiliates in
accordance with Processor’s Lockbox Processing Agreement and Instructions, or other applicable agreement and related service terms (individually and collectively, the “Processor Documentation”), as appropriate. 

  

 6. Credit of Funds to Account. 

(a) Processor will process the checks and other deposited items and credit the total amount to the account described below (the
“Lockbox Account”). The Lockbox Account will be established at JPMorgan Chase Bank, N.A. (ABA No.: 122100024) as account number 464643308. The Lockbox Account will be maintained and all banking functions will be provided by JPMorgan
Chase Bank, N.A. 
 (b) Unless otherwise directed by the Trustee, AmeriCredit agrees that all collected funds on deposit in the
Lockbox Account shall be transferred from the Lockbox Account within two Business Days by wire transfer in immediately available funds to the following account: Wells Fargo Bank, National Association, Account No. 0001038377 f/b/o 48060201; ABA
No. 121000248 (the “Collection Account”). 
 7. Processor Documentation. This Agreement
supplements, rather than replaces, the Processor Documentation, terms and conditions, and other standard documentation in effect from time to time with respect to the Lockbox or the services provided by Processor in connection therewith. The
Processor Documentation will continue to apply to the Lockbox and such services, and the respective rights, powers, duties, obligations, liabilities and responsibilities of the parties thereto and hereto, to the extent not expressly conflicting with
the provisions of this Agreement (however, in the event of any such conflict, the provisions of this Agreement shall control). Prior to issuing any instructions, the Trustee shall provide Processor with such documentation as Processor may reasonably
request to establish the identity and authority of the individuals issuing instructions on behalf of the Trustee. The Trustee may request the Processor to provide other services with respect to the Lockbox; however, if such services are not
authorized or otherwise covered under the Processor Documentation, Processor’s decision to provide any such services shall be made in its sole discretion (including without limitation being subject to AmeriCredit and/or the Trustee executing
the Processor Documentation or other documentation as Processor may require in connection therewith). 
 8. Processor’s
General Duties. Notwithstanding anything to the contrary in this Agreement: (i) Processor shall have only the duties and responsibilities with respect to the matters set forth herein as is expressly set forth in writing herein and shall not
be deemed to be an agent, bailee or fiduciary for any party hereto; (ii) Processor shall be fully protected in acting or refraining from acting in good faith without investigation on any notice, instruction or request purportedly furnished to
it by AmeriCredit or the Trustee in accordance with the terms hereof, in which case the parties hereto agree that Processor has no duty to make any further inquiry whatsoever; (iii) it is hereby acknowledged and agreed that Processor has no
knowledge of (and is not required to know) the terms and provisions of the Sale and Servicing Agreement referred to in Section 1 above or any other related documentation or whether any actions by the Trustee, AmeriCredit or any other person or
entity are permitted or a breach thereunder or consistent or inconsistent therewith; and (iv) Processor shall not be liable to any party hereto or any other person for any action or failure to act under or in connection with this Agreement
except to the extent such conduct constitutes its own willful misconduct or gross negligence. 
 9. Processing of Items.
The provision of services shall be governed by the Processor Documentation or other applicable agreements and related service terms, as may be amended from time to time, subject to the prior written consent to any such amendments of a material
nature by the Trustee and AmeriCredit, which consents shall not be unreasonably withheld, conditioned or delayed. 

  
 2 

 10. Trust Correspondence. Any envelopes collected from the Lockbox which contain
correspondence and other documents (including, but not limited to, certificates of title, tax receipts, insurance policy endorsements and any other documents or communications of or relating to the Receivables) will be sent to the Servicer at its
current address. Any enclosed payment(s), coupon(s) or check(s) will be processed and deposited by Processor in accordance with the provisions of the Agreement. 
 11. Confidentiality. Processor agrees that all information concerning the Obligors of the Receivables which comes into Processor’s possession pursuant to this Agreement, other than that which
is already known by Processor or to the general public, will be treated in a confidential manner. 
 12. Fees. Unless
otherwise agreed by Processor, AmeriCredit shall pay Processor the fees set forth for this Service in Processor’s most current Price List as in effect from time to time, plus additional fees for the performance of services beyond the terms of
this Agreement, or resulting from increased expenses incurred by the failure of AmeriCredit to furnish within a reasonable period of time following a request by Processor, data in a form acceptable to Processor. Processor shall look first to
AmeriCredit for payment of such fees. If AmeriCredit fails to pay Processor within thirty (30) days of receipt of invoice but in any event no later than forty-five (45) days from the date of the invoice, Processor will notify the Trustee
in writing as soon as practicable and provide to the Trustee a copy of such unpaid invoice. Subject to rights to terminate this Agreement pursuant to Section 17, Processor will continue to perform its services under this Agreement and the
amount reflected in such invoice will be paid to Processor by the Trustee out of funds in the Collection Account on the next Distribution Date (as defined below), which follows by at least three Business Days the date of giving such notice to the
Trustee. Any fees unpaid after such date will be considered unpaid fees. “Distribution Date” means the fifteenth day of the following calendar month, or, if such day is not a Business Day, the immediately following Business Day.

 13. Processor’s Liability for Nonperformance. In performing the Services, Processor will exercise ordinary care
and act in good faith. Processor shall be deemed to have exercised ordinary care if its action or failure to act is in conformity with general information technology processing standards. Processor’s liability relating to its or its
employees’, officers’ or agents’ performance or failure to perform hereunder, or for any other action or inaction of Processor, or its employees, officers or agents, shall be limited exclusively to the lesser of (i) any direct
losses which are caused by the failure of Processor, its employees, officers or agents to exercise reasonable care and/or act in good faith, and (ii) the face amount of any item, check, payment or other funds lost or mishandled by the action or
inaction of Processor. Under no circumstances will Processor be liable for any general, indirect, special, incidental, punitive or consequential damages or for damages caused, in whole or in part, by the action or inaction of AmeriCredit or the
Trustee, whether or not such action or inaction constitutes negligence. Processor will not be liable for any damage, loss, liability or delay caused by accidents, strikes, fire, flood, war, riot, equipment breakdown, electrical or mechanical
failure, acts of God or any cause which is reasonably unavoidable or beyond its reasonable control. AmeriCredit agrees that the fees charged by Processor for the performance of this Service shall be deemed to have been

  
 3 

 
established in contemplation of these limitations on Processor’s liability. In addition, AmeriCredit agrees to indemnify and hold Processor harmless from all liability on the part of
Processor under this Section 13 except such liability as is attributable to the gross negligence of Processor. 
 14.
Indemnification by AmeriCredit. AmeriCredit agrees to indemnify, defend and hold Processor harmless from and against any and all damage, loss, cost, expense or liability of any kind, including, without limitation, reasonable attorneys’
fees and court costs, which results, directly or indirectly, in whole or in part, from any negligence and willful misconduct or infidelity of AmeriCredit or any agent or employee of AmeriCredit, incurred in connection with this Agreement or the
Lockbox or any interpleader proceeding relating thereto or from Processor acting upon information furnished by AmeriCredit under this Agreement. AmeriCredit will remain liable for all indemnification under this Section 14 after its removal
and/or resignation as Servicer. 
 15. Other Agreements. Processor shall not be bound by any agreement between any of the
other parties hereto irrespective of whether Processor has knowledge of the existence of any such agreement or the terms and provisions thereof. 
 16. Records. This Agreement and the performance by Processor of the Services hereunder shall not relieve Processor of any obligation imposed by law or contract regarding the maintenance of records.

 17. Amendment and Termination. This Agreement may only be amended in writing signed by all parties to this Agreement.
AmeriCredit or Trustee may immediately terminate this Agreement for cause, provided, however, that a similar agreement has been executed with a successor processor reasonably acceptable to the Trustee or the Trustee has consented to such
termination. The Trustee may immediately terminate this Agreement and shall do so upon written notice to the other parties hereto. Otherwise, any party may terminate this Agreement on sixty (60) days’ prior written notice to the others;
provided, however, that AmeriCredit shall promptly notify the Trustee of receipt of any such notice and shall arrange for alternative lockbox processing services satisfactory to the Trustee prior to the termination of the Services. Upon any
termination of the Agreement, (a) Processor will close the Lockbox and (b) Processor will process all mail addressed to the Lockbox in the manner instructed by AmeriCredit in accordance with the Processor Documentation for a period of at
least ninety (90) days after the termination date, unless arranged otherwise between AmeriCredit and Processor. After any termination, Processor’s fees with respect to the Services it performs during such period shall be consistent with
such fees at the time of such termination. 
 18. Successor Servicer. Each of Processor and the Trustee agrees that if
the Servicer has been terminated or resigns as Servicer, this Agreement shall not thereupon terminate and the successor servicer appointed pursuant to the Sale and Servicing Agreement shall succeed, except as otherwise provided herein, to all
rights, benefits, duties and obligations of the Servicer hereunder. Prior to the termination or resignation of the Trustee or the Servicer, the Trustee or the Servicer, respectively, shall provide notice to Processor in accordance with the terms and
conditions to which each of the Trustee or the Servicer, respectively, is itself entitled upon termination or resignation. 

  
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 19. Successor Processor. Any company or national banking association into which
Processor may be merged or converted or with which it may be consolidated, or any company or national banking association resulting from any merger, conversion or consolidation to which it shall be a party or any company or national association to
which Processor may sell or transfer all or substantially all of its business (provided any such company or national banking association shall be a company organized under the laws of any state of the United States or a national banking association
and shall be eligible to perform all of the duties imposed upon it by this Agreement) shall be the successor to Processor hereunder without the execution or filing of any document or any further act by any of the parties to this Agreement; provided,
however, that Processor notify the Trustee and AmeriCredit of any such merger, conversion or consolidation within 30 days of its occurrence. 
 20. Governing Law. This Agreement shall be governed by the laws of the State of Texas. All parties hereby waive all rights to a trial by jury in any action or proceeding relating to Lockbox or this
Agreement. 
 21. Notices. All written notices required by this Agreement shall be delivered or mailed to the other
parties at the addresses set forth below or to such other address as a party may specify in writing. 
  

			
	Processor:            	 	Regulus Group II LLC
		 	 4855 Peachtree Industrial Blvd
 Suite 245
 Norcross, Georgia 30092
 Attention: General Counsel

		
	AmeriCredit:	 	 AmeriCredit Financial Services, Inc.
 801 Cherry Street, Suite 3500
 Fort Worth, Texas 76102

Attention: Chief Financial Officer

		
	Trustee:	 	 Wells Fargo Bank, National Association

		 	 Sixth Street and Marquette Avenue
 MAC N9311-161
 Minneapolis, Minnesota 55479
 Attention: AmeriCredit Automobile Receivables Trust 2012-3

 22. Bankruptcy. Processor hereby covenants and agrees that, prior to the date which is one year
and one day after the payment in full of the Notes and all amounts owed under the Indenture and the Sale and Servicing Agreement, Processor will not institute against or join with any other person in instituting against the Trust or the Seller, any
proceeding or file any petition against the Trust or the Seller under any bankruptcy, insolvency or similar law for the relief or aid of debtors (including, without limitation, Title 11 of the United States Code or any amendment thereto), seeking
the dissolution, liquidation, arrangement, reorganization or similar relief of the Trust or the Seller or the appointment of a receiver, trustee, custodian or liquidator of the Trust or the Seller, or issue any writ, order, judgment warrant of
attachment, execution or similar process against a substantial part of the property, assets or business of the Trust or the Seller. This covenant shall survive the termination of this Agreement. 

  
 5 

									
	PROCESSOR:	 		 	AMERICREDIT:
			
	REGULUS GROUP II LLC	 		 	 AMERICREDIT FINANCIAL SERVICES, INC.

					
	By:	 	 	 		 	By:	 	 
		 	 Name:
 Title:
	 		 		 	 Name:

Title:

 TRUSTEE: 

WELLS FARGO BANK, 
 NATIONAL ASSOCIATION,

 as Trustee 
  

			
	
		
	By:	 	 
		 	 Name:

Title:

 [Series 2012-3 Lockbox Processing Agreement] 

  
 6EX-4.A

 Exhibit 4(a) 

 
  

 
 INDENTURE OF TRUST

 (2012 Series A) 
 BETWEEN 
 THE INDUSTRIAL DEVELOPMENT AUTHORITY 

OF THE COUNTY OF PIMA 
 AND 
 U.S. BANK TRUST NATIONAL ASSOCIATION 

Dated as of June 1, 2012 
 Authorizing 
 Industrial Development Revenue Bonds, 

2012 Series A 
 (Tucson Electric Power Company Project) 
  

 
  

  
 TABLE OF CONTENTS* 

 

									
	 	 	 	  	  	  	Page	 
	 ARTICLE I          DEFINITIONS
	  	 	2	  
				
		 	Section 1.01	  	 Definitions
	  	 	2	  
		
	 ARTICLE II         THE BONDS
	  	 	6	  
				
		 	Section 2.01	  	 Creation of Bonds
	  	 	6	  
		 	Section 2.02	  	 Form of Bonds
	  	 	7	  
		 	Section 2.03	  	 Execution of Bonds
	  	 	7	  
		 	Section 2.04	  	 Authentication of Bonds
	  	 	7	  
		 	Section 2.05	  	 Bonds Not General Obligations
	  	 	8	  
		 	Section 2.06	  	 Prerequisites to Authentication of Bonds
	  	 	8	  
		 	Section 2.07	  	 Lost or Destroyed Bonds or Bonds Canceled in Error
	  	 	8	  
		 	Section 2.08	  	 Transfer, Registration and Exchange of Bonds
	  	 	9	  
		 	Section 2.09	  	 Other Obligations
	  	 	10	  
		 	Section 2.10	  	 Temporary Bonds
	  	 	10	  
		 	Section 2.11	  	 Cancellation of Bonds
	  	 	10	  
		 	Section 2.12	  	 Payment of Principal and Interest
	  	 	10	  
		 	Section 2.13	  	 Applicability of Book-Entry Provisions
	  	 	11	  
		
	 ARTICLE III       REDEMPTION OF BONDS
	  	 	11	  
				
		 	Section 3.01	  	 Redemption Provisions
	  	 	11	  
		 	Section 3.02	  	 Selection of Bonds to be Redeemed
	  	 	11	  
		 	Section 3.03	  	 Procedure for Redemption
	  	 	12	  
		 	Section 3.04	  	 Payment of Redemption Price
	  	 	12	  
		 	Section 3.05	  	 No Partial Redemption After Default
	  	 	13	  
		
	 ARTICLE IV       THE BOND FUND
	  	 	13	  
				
		 	Section 4.01	  	 Creation of Bond Fund
	  	 	13	  
		 	Section 4.02	  	 Liens
	  	 	13	  
		 	Section 4.03	  	 Deposits into Bond Fund
	  	 	13	  
		 	Section 4.04	  	 Use of Moneys in Bond Fund
	  	 	13	  
		 	Section 4.05	  	 Custody of Bond Fund; Withdrawal of Moneys
	  	 	13	  
		 	Section 4.06	  	 Bonds Not Presented for Payment
	  	 	13	  
		 	Section 4.07	  	 Moneys Held in Trust
	  	 	14	  
		
	 ARTICLE V         DISPOSITION OF
PROCEEDS
	  	 	14	  
				
		 	Section 5.01	  	 Disposition of Proceeds
	  	 	14	  
		
	 ARTICLE VI       INVESTMENTS
	  	 	14	  
				
		 	Section 6.01	  	 Investments
	  	 	14	  
		
	 ARTICLE VII     GENERAL COVENANTS
	  	 	15	  
				
		 	Section 7.01	  	 No General Obligations
	  	 	15	  
		 	Section 7.02	  	 Performance of Covenants of the Authority; Representations
	  	 	15	  
		 	Section 7.03	  	 Maintenance of Rights and Powers; Compliance with Laws
	  	 	15	  
		 	Section 7.04	  	 Enforcement of Obligations of the Company; Amendments
	  	 	15	  
		 	Section 7.05	  	 Further Instruments
	  	 	15	  
		 	Section 7.06	  	 No Disposition of Trust Estate
	  	 	15	  

 

	*	This table of contents is not a part of the Indenture, and is for convenience only. The captions herein are of no legal effect and do not vary the meaning or legal
effect of any part of the Indenture. 

  
 (i)

									
		 	 Section 7.07
	  	Financing Statements	  	 	15	  
		 	 Section 7.08
	  	Tax Covenants; Rebate Fund	  	 	16	  
		
	 ARTICLE VIII    DEFEASANCE
	  	 	16	  
				
		 	 Section 8.01
	  	Defeasance	  	 	16	  
		
	 ARTICLE IX       DEFAULTS AND REMEDIES
	  	 	17	  
				
		 	 Section 9.01
	  	Events of Default	  	 	17	  
		 	 Section 9.02
	  	Remedies	  	 	18	  
		 	 Section 9.03
	  	Restoration to Former Position	  	 	18	  
		 	 Section 9.04
	  	Owners’ Right to Direct Proceedings	  	 	18	  
		 	 Section 9.05
	  	Limitation on Owners’ Right to Institute Proceedings	  	 	19	  
		 	 Section 9.06
	  	No Impairment of Right to Enforce Payment	  	 	19	  
		 	 Section 9.07
	  	Proceedings by Trustee without Possession of Bonds	  	 	19	  
		 	 Section 9.08
	  	No Remedy Exclusive	  	 	19	  
		 	 Section 9.09
	  	No Waiver of Remedies	  	 	19	  
		 	 Section 9.10
	  	Application of Moneys	  	 	19	  
		 	 Section 9.11
	  	Severability of Remedies	  	 	20	  
		
	 ARTICLE X         TRUSTEE
	  	 	20	  
				
		 	 Section 10.01
	  	Acceptance of Trusts	  	 	20	  
		 	 Section 10.02
	  	No Responsibility for Recitals	  	 	20	  
		 	 Section 10.03
	  	Limitations on Liability	  	 	20	  
		 	 Section 10.04
	  	Compensation, Expenses and Advances	  	 	21	  
		 	 Section 10.05
	  	Notice of Events of Default	  	 	21	  
		 	 Section 10.06
	  	Action by Trustee	  	 	21	  
		 	 Section 10.07
	  	Good Faith Reliance	  	 	21	  
		 	 Section 10.08
	  	Dealings in Bonds and with the Authority and the Company	  	 	21	  
		 	 Section 10.09
	  	Allowance of Interest	  	 	22	  
		 	 Section 10.10
	  	Construction of Indenture	  	 	22	  
		 	 Section 10.11
	  	Resignation of Trustee	  	 	22	  
		 	 Section 10.12
	  	Removal of Trustee	  	 	22	  
		 	 Section 10.13
	  	Appointment of Successor Trustee	  	 	22	  
		 	 Section 10.14
	  	Qualifications of Successor Trustee	  	 	23	  
		 	 Section 10.15
	  	Judicial Appointment of Successor Trustee	  	 	23	  
		 	 Section 10.16
	  	Acceptance of Trusts by Successor Trustee	  	 	23	  
		 	 Section 10.17
	  	Successor by Merger or Consolidation	  	 	23	  
		 	 Section 10.18
	  	Standard of Care	  	 	23	  
		 	 Section 10.19
	  	Notice to Owners of Bonds of Event of Default	  	 	23	  
		 	 Section 10.20
	  	Intervention in Litigation of the Authority	  	 	23	  
		 	 Section 10.21
	  	Notices of Trustee	  	 	24	  
		
	 ARTICLE XI       EXECUTION OF INSTRUMENTS BY OWNERS OF BONDS
AND PROOF OF OWNERSHIP OF BONDS
	  	 	24	  
				
		 	 Section 11.01
	  	Execution of Instruments; Proof of Ownership	  	 	24	  
		
	 ARTICLE XII     MODIFICATION OF THIS INDENTURE AND THE LOAN
AGREEMENT
	  	 	24	  
				
		 	 Section 12.01
	  	Limitations	  	 	24	  
		 	 Section 12.02
	  	Supplemental Indentures without Owner Consent	  	 	24	  
		 	 Section 12.03
	  	Supplemental Indentures with Consent of Owners	  	 	25	  
		 	 Section 12.04
	  	Effect of Supplemental Indenture	  	 	26	  
		 	 Section 12.05
	  	Consent of the Company	  	 	26	  
		 	 Section 12.06
	  	Amendment of Loan Agreement without Consent of Owners	  	 	26	  
		 	 Section 12.07
	  	Amendment of Loan Agreement with Consent of Owners	  	 	26	  
		 	 Section 12.08
	  	Company as Owner	  	 	27	  

  
 (ii)

									
	 ARTICLE XIII    MISCELLANEOUS
	  	 	27	  
				
		 	 Section 13.01
	  	Successors of the Authority	  	 	27	  
		 	 Section 13.02
	  	Parties in Interest	  	 	27	  
		 	 Section 13.03
	  	Severability	  	 	27	  
		 	 Section 13.04
	  	No Personal Liability of Authority Officials	  	 	27	  
		 	 Section 13.05
	  	Bonds Owned by the Authority or the Company	  	 	27	  
		 	 Section 13.06
	  	Counterparts	  	 	28	  
		 	 Section 13.07
	  	Governing Law	  	 	28	  
		 	 Section 13.08
	  	Notices	  	 	28	  
		 	 Section 13.09
	  	Holidays	  	 	28	  
		 	 Section 13.10
	  	Statutory Notice Regarding Cancellation of Contracts	  	 	28	  
	 Exhibit A - Form of 2012 Series A Bond
	  	 	A-1	  
	 Exhibit B - Form of Endorsement of Transfer
	  	 	B-1	  
	 Exhibit C - Form of Certificate of Authentication
	  	 	C-1	  

  
 (iii)

 INDENTURE OF TRUST 

THIS INDENTURE OF TRUST (2012 Series A), dated as of June 1, 2012 (this “Indenture”), between THE INDUSTRIAL DEVELOPMENT
AUTHORITY OF THE COUNTY OF PIMA, an Arizona nonprofit corporation designated by law as a political subdivision of the State of Arizona (hereinafter called the “Authority”), and U.S. Bank Trust National Association, a national banking
association, as trustee (hereinafter called the “Trustee”), 
 W I T N E S S E T H : 

WHEREAS, the Authority is authorized and empowered under Title 35, Chapter 5, Arizona Revised Statutes, as amended (the
“Act”), to issue its bonds in accordance with the Act and to make secured or unsecured loans for the purpose of financing or refinancing the acquisition, construction, improvement or equipping of projects consisting of land, any building
or other improvement, and all real and personal properties, including machinery and equipment, whether or not now in existence or under construction, whether located within or without the State of Arizona or Pima County, which shall be suitable for,
among other things, facilities for the furnishing of electric energy and to charge and collect interest on such loans and pledge the proceeds of loan agreements as security for the payment of the principal of and interest on any bonds, or designated
issues of bonds, issued by the Authority and any agreements made in connection therewith, whenever the Board of Directors of the Authority finds such loans to further advance the interest of the Authority or the public and in the public interest;
and 
 WHEREAS, there has heretofore been issued and sold on behalf of Tucson Electric Power Company, an Arizona corporation
(the “Company”) (a) $83,700,000 aggregate principal amount of The Industrial Development Authority of the County of Apache Pollution Control Revenue Bonds, 1998 Series A (Tucson Electric Power Company Project) $6,890,000 aggregate
principal amount of which remain outstanding (the “1998 Series A Bonds”), (b) $99,800,000 aggregate principal amount of The Industrial Development Authority of the County of Apache Pollution Control Revenue Bonds, 1998 Series B
(Tucson Electric Power Company Project) $8,215,000 aggregate principal amount of which remain outstanding (the “1998 Series B Bonds”), and (c) $16,500,000 aggregate principal amount of The Industrial Development Authority of the
County of Apache Industrial Development Revenue Bonds, 1998 Series C (Tucson Electric Power Company Project) $1,360,000 aggregate principal amount of which remain outstanding (the “1998 Series C Bonds,” and, together with the 1998 Series A
Bonds and the 1998 Series B Bonds, the “1998 Bonds”); and 
 WHEREAS, the proceeds of the 1998 Bonds were loaned to
the Company to refinance a portion of the costs of certain facilities, including certain electric transmission and/or distribution facilities (hereinafter collectively referred to as the “Facilities”) located within Pima County and Cochise
County, Arizona, as more fully described in Exhibit A to the Loan Agreement, dated as of June 1, 2012 (the “Loan Agreement”), between the Authority and the Company; and 

WHEREAS, the Authority proposes to issue and sell $16,465,000 aggregate principal amount of The Industrial Development Authority of the
County of Pima Industrial Development Revenue Bonds, 2012 Series A (Tucson Electric Power Company Project) (the “Bonds”) for the purpose of refinancing the above-described Facilities; and 

WHEREAS, the proceeds of the Bonds will be applied to redeem the 1998 Bonds. 

NOW, THEREFORE, for and in consideration of these premises and the mutual covenants herein contained, of the acceptance by the Trustee of
the trusts hereby created, of the purchase and acceptance of the Bonds by the Owners (as hereinafter defined) thereof, and for other good and valuable consideration the receipt and sufficiency of which are hereby acknowledged, in order to secure the
payment of the principal of and interest on the Bonds at any time Outstanding (as hereinafter defined) under this Indenture according to their tenor and effect and the performance and observance by the Authority of all the covenants and conditions
expressed or implied herein and contained in the Bonds, the Authority does hereby grant, bargain, sell, convey, mortgage, pledge and assign, and grant a security interest in, the Trust Estate (as hereinafter defined) to the Trustee, its successors
in trust and their assigns forever; 

 TO HAVE AND TO HOLD all the same with all privileges and appurtenances hereby conveyed and
assigned, or agreed or intended so to be, to the Trustee, its successors in trust and their assigns forever; 
 IN TRUST
NEVERTHELESS, upon the terms and trusts herein set forth, first, for the equal and proportionate benefit and security of all Owners of the Bonds issued under and secured by this Indenture without preference, priority or distinction as to the lien of
any Bonds over any other Bonds; 
 PROVIDED, HOWEVER, that if, after the right, title and interest of the Trustee in and to the
Trust Estate shall have ceased, terminated and become void in accordance with Article VIII hereof, the principal of and interest on the Bonds shall have been paid to the Owners thereof, or shall have been paid to the Company pursuant to
Section 4.06 hereof, then and in that case these presents and the estate and rights hereby granted shall cease, terminate and be void, and thereupon the Trustee shall cancel and discharge this Indenture and execute and deliver to the Authority
and the Company such instruments in writing as shall be requisite to evidence the discharge hereof; otherwise this Indenture is to be and remain in full force and effect. 
 THIS INDENTURE OF TRUST FURTHER WITNESSETH, and it is expressly declared, that all Bonds issued and secured hereunder are to be issued, authenticated and delivered, and the Trust Estate and the other
estate and rights hereby granted are to be dealt with and disposed of, under, upon and subject to the terms, conditions, stipulations, covenants, agreements, trusts, uses and purposes as hereinafter expressed, and the Authority has agreed and
covenanted, and does hereby agree and covenant, with the Trustee and with the respective Owners, from time to time, of the Bonds, as follows: 
 ARTICLE I 
 DEFINITIONS 

Section 1.01 Definitions. The terms defined in this Article I shall, for all purposes of this Indenture, have the meanings
herein specified, unless the context clearly requires otherwise: 
 Act: 

“Act” shall mean Title 35, Chapter 5, Arizona Revised Statutes, and all acts supplemental thereto or amendatory thereof.

 Authority: 

“Authority” shall mean The Industrial Development Authority of the County of Pima, an Arizona nonprofit corporation designated
by law as a political subdivision of the State of Arizona incorporated for and with the approval of Pima County, Arizona, pursuant to the provisions of the Constitution of the State of Arizona and the Act, its successors and their assigns.

 Administration Expenses: 
 “Administration Expenses” shall mean the reasonable expenses incurred by the Authority with respect to the Loan Agreement, this Indenture and any transaction or event contemplated by the Loan
Agreement or this Indenture, including the compensation and reimbursement of expenses and advances payable to the Trustee and a pro rata share of the Authority’s annual operating expenses in accordance with the provisions of
Section 4.02(c) of The Industrial Development Authority of the County of Pima Procedural Pamphlet II, as more fully described in the Tax Agreement. 
 Authorized Company Representative: 
 “Authorized Company
Representative” shall mean each person at the time designated to act on behalf of the Company by written certificate furnished to the Authority and the Trustee containing the specimen signature of such person and signed on behalf of the Company
by its President, any Vice President or its Treasurer, together with its Secretary or any Assistant Secretary. 

  
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 Bond Counsel: 
 “Bond Counsel” shall mean any firm or firms of nationally recognized bond counsel experienced in matters pertaining to the validity of, and exclusion from gross income for federal tax purposes
of interest on bonds issued by states and political subdivisions, selected by the Company and acceptable to the Authority. 
 Bond Fund:

 “Bond Fund” shall mean the fund created by Section 4.01 hereof. 

Bonds: 
 “Bond”
or “Bonds” shall mean The Industrial Development Authority of the County of Pima Industrial Development Revenue Bonds, 2012 Series A (Tucson Electric Power Company Project) of the Authority issued under this Indenture. 

Code: 
 “Code”
shall mean the Internal Revenue Code of 1986, as amended from time to time. Each reference to a section of the Code herein shall be deemed to include the United States Treasury Regulations proposed or in effect thereunder and applicable to the
Bonds or the use of proceeds thereof, unless the context clearly requires otherwise. References to any particular Code section shall, in the event of a successor to the Code, be deemed to be a reference to the successor to such Code section.

 Company: 

“Company” shall mean Tucson Electric Power Company, a corporation organized and existing under the laws of the State of Arizona,
its successors and their assigns, including, without limitation, any successor obligor under Section 6.01 or 7.01 of the Loan Agreement to the extent of the obligations assumed thereunder. 

Depositary: 

“Depositary” shall mean The Depository Trust Company or any successor thereto as a securities repository for the Bonds.

 Facilities: 

“Facilities” shall have the meaning specified in the fifth Whereas clause of this Indenture. 

Government Obligations: 

“Government Obligations” shall mean: 
 (a) direct obligations of, or obligations the principal of and interest on which are unconditionally guaranteed by, the United States of America entitled to the benefit of the full faith and credit
thereof; and 
 (b) certificates, depositary receipts or other instruments which evidence a direct ownership interest in
obligations described in clause (a) above or in any specific interest or principal payments due in respect thereof; provided, however, that the custodian of such obligations or specific interest or principal payments shall be a bank or trust
company organized under the laws of the United States of America or of any state or territory thereof or of the District of Columbia, with a combined capital stock surplus and undivided profits of at least $50,000,000; and provided, further, that
except as may be otherwise required by law, such custodian shall be obligated to pay to the holders of such certificates, depositary receipts or other instruments the full amount received by such custodian in respect of such obligations or specific
payments and shall not be permitted to make any deduction therefrom. 

  
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 Indenture: 
 “Indenture” shall mean this Indenture of Trust, dated as of June 1, 2012, between the Authority and the Trustee, and any and all modifications, alterations, amendments and supplements
thereto. 
 Investment Securities: 
 “Investment Securities” shall mean any of the following obligations or securities on which neither the Company nor any of its subsidiaries is the obligor: (a) Government Obligations;
(b) interest bearing deposit accounts (which may be represented by certificates of deposit) in national, state or foreign banks having a combined capital and surplus of not less than $100,000,000; (c) bankers’ acceptances drawn on and
accepted by commercial banks having a combined capital and surplus of not less than $100,000,000; (d) (i) direct obligations of, (ii) obligations the principal of and interest on which are unconditionally guaranteed by, and
(iii) any other obligations the interest on which is exempt from federal income taxation issued by, any state of the United States of America, the District of Columbia or the Commonwealth of Puerto Rico, or any political subdivision, agency,
authority or other instrumentality of any of the foregoing, which, in any case, are rated by a nationally recognized rating agency in any of its three highest rating categories; (e) obligations of any agency or instrumentality of the United
States of America; (f) commercial or finance company paper which is rated by a nationally recognized rating agency in any of its three highest rating categories; (g) corporate debt securities issued by corporations having debt securities
rated by a nationally recognized rating agency in any of its three highest rating categories; (h) repurchase agreements with banking or financial institutions having a combined capital and surplus of not less than $100,000,000 with respect to
any of the foregoing obligations or securities; (i) shares or interests in registered investment companies whose assets consist of obligations or securities which are described in any other clause of this sentence; and (j) any other
obligations which may lawfully be purchased by the Trustee. The commercial banks and banking institutions referred to above may include the entity acting as Trustee hereunder if such entity shall otherwise satisfy the requirements set forth above.

 Loan Agreement: 
 “Loan Agreement” shall mean the Loan Agreement, dated as of June 1, 2012, between the Authority and the Company relating to the Bonds, and any and all modifications, alterations, amendments
and supplements thereto. 
 Loan Payments: 
 “Loan Payments” shall mean the payments required to be made by the Company pursuant to Section 5.01 of the Loan Agreement. 
 1954 Code: 
 “1954 Code” shall mean the Internal Revenue Code of
1954, as amended. 
 1998 Bonds: 
 “1998 Bonds” shall mean the 1998 Series A Bonds, the 1998 Series B Bonds and the 1998 Series C Bonds. 
 1998 Series A Bonds: 
 “1998 Series A Bonds” shall mean the
$83,700,000 aggregate principal amount of The Industrial Development Authority of the County of Apache Pollution Control Revenue Bonds, 1998 Series A (Tucson Electric Power Company Project). 

  
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 1998 Series B Bonds: 
 “1998 Series B Bonds” shall mean the $99,800,000 aggregate principal amount of The Industrial Development Authority of the County of Apache Pollution Control Revenue Bonds, 1998 Series B (Tucson
Electric Power Company Project). 
 1998 Series C Bonds: 
 “1998 Series C Bonds” shall mean the $16,500,000 aggregate principal amount of The Industrial Development Authority of the County of Apache Industrial Development Revenue Bonds, 1998 Series C
(Tucson Electric Power Company Project). 
 Notice by Mail or Electronic Means: 

“Notice by Mail or Electronic Means” or “notice” of any action or condition “by Mail or Electronic Means”
shall mean a written notice meeting the requirements of this Indenture mailed by first-class mail to the Owners of specified registered Bonds at the addresses shown in the registration books maintained pursuant to Section 2.08 hereof or notice
delivered by electronic means including, without limitation, email in PDF format. 
 Outstanding: 

“Outstanding”, when used in reference to the Bonds, shall mean, as at any particular date, the aggregate of all Bonds
authenticated and delivered under this Indenture except: 
 (a) those canceled by the Trustee at or prior to such date or
delivered to or acquired by the Trustee at or prior to such date for cancellation; 
 (b) those deemed to be paid in accordance
with Article VIII hereof; and 
 (c) those paid pursuant to Section 2.07 and those in lieu of or in exchange or
substitution for which other Bonds shall have been authenticated and delivered pursuant to this Indenture, unless proof satisfactory to the Trustee and the Company is presented that such Bonds are held by a bona fide holder in due course.

 Owner: 

“Owner” shall mean the person in whose name any Bond is registered upon the registration books maintained pursuant to
Section 2.08 hereof. The Company may be an Owner. 
 Person: 

“Person” means (i) any corporation, limited liability company, partnership, joint venture, association, joint-stock
company, business trust, or unincorporated organization, in each case formed or organized under the laws of the United States of America, any state thereof or the District of Columbia, or (ii) the United States of America or any state thereof,
or any political subdivision of either thereof, or any agency, authority or other instrumentality of any of the foregoing. 
 Rebate Fund:

 “Rebate Fund” shall mean the fund created by Section 7.08 hereof. 

Receipts and Revenues of the Authority from the Loan Agreement: 
 “Receipts and Revenues of the Authority from the Loan Agreement” shall mean all moneys paid or payable to the Trustee for the account of the Authority by the Company in respect of the Loan
Payments and payments pursuant to Section 9.01 of the Loan Agreement and all receipts of the Trustee which, under the provisions of this Indenture, reduce the amount of such payments. 

  
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 Record Date: 
 “Record Date” shall mean the close of business on the fifteenth (15th) day of the calendar month immediately preceding each regularly scheduled interest payment date. 

Supplemental Indenture: 

“Supplemental Indenture” shall mean any indenture of the Authority modifying, altering, amending, supplementing or confirming
this Indenture for any purpose, in accordance with the terms hereof. 
 Supplemental Loan Agreement: 

“Supplemental Loan Agreement” shall mean any agreement between the Authority and the Company modifying, altering, amending or
supplementing the Loan Agreement, in accordance with the terms thereof and hereof. 
 Tax Agreement: 

“Tax Agreement” shall mean that tax certificate and agreement, dated the date of the initial authentication and delivery of the
Bonds, between the Authority and the Company, relating to the requirements of the Code, and any and all modifications, alterations, amendments and supplements thereto. 
 Trust Estate: 
 “Trust Estate” shall mean at any particular time
all right, title and interest of the Authority in and to the Loan Agreement (except its rights under Sections 5.03, 5.04, 6.03 and 8.05 thereof and any rights of the Authority to receive notices, certificates, requests, requisitions and other
communications thereunder), including without limitation, the Receipts and Revenues of the Authority from the Loan Agreement, the Bond Fund and all moneys and Investment Securities from time to time on deposit therein (excluding, however, any moneys
or Investment Securities held in the Rebate Fund), any and all other moneys and obligations (other than Bonds) which at such time are deposited or are required to be deposited with, or are held or are required to be held by or on behalf of, the
Trustee in trust under any of the provisions of this Indenture and all other rights, titles and interests which at such time are subject to the lien of this Indenture; provided, however, that in no event shall there be included in the Trust Estate
(a) moneys or obligations deposited with or held by the Trustee in the Rebate Fund pursuant to Section 7.08 hereof or (b) moneys or obligations deposited with or paid to the Trustee for the redemption or payment of Bonds which are
deemed to have been paid in accordance with Article VIII hereof or moneys held pursuant to Section 4.06 hereof. 
 Trustee; Principal
Office thereof: 
 “Trustee” shall mean U.S. Bank Trust National Association, as trustee under this Indenture, its
successors in trust and their assigns. “Principal Office” of the Trustee shall mean the designated corporate trust office of the Trustee, which office at the date of acceptance by the Trustee of the duties and obligations imposed on the
Trustee by this Indenture is located at the address specified in Section 13.08 hereof. 
 ARTICLE II 

THE BONDS 

Section 2.01 Creation of Bonds. There is hereby authorized and created under this Indenture, for the purpose of providing
moneys to redeem, or provide for the redemption of the 1998 Bonds, an issue of Bonds, entitled to the benefit, protection and security of this Indenture, in the aggregate principal amount of $16,465,000. Each of the Bonds shall be designated by the
title “The Industrial Development Authority of the County of Pima Industrial Development Revenue Bond, 2012 Series A (Tucson Electric Power Company Project)”. The Bonds shall mature, subject to prior redemption upon the terms and
conditions hereinafter set forth, on June 1, 2030 and shall bear interest from the date thereof until payment of the principal or redemption price thereof shall have been made or provided for in accordance with the provisions hereof, whether at
maturity, upon redemption or otherwise, at the rate of four and a half per centum (4.50%) per annum, with interest thereon payable semi-annually on each June 1 and December 1, commencing December 1, 2012. Interest shall be
calculated on the basis of a 360-day year consisting of twelve 30-day months. 

  
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 Section 2.02 Form of Bonds. Bonds shall be authenticated and delivered hereunder
solely as fully registered bonds without coupons in the denomination of $5,000 or integral multiples thereof. Bonds shall be numbered as determined by the Trustee. Bonds authenticated prior to the first interest payment date shall be dated their
date of original issuance. Bonds authenticated on or subsequent to the first interest payment date shall be dated the interest payment date next preceding the date of authentication thereof, unless such date of authentication shall be an interest
payment date to which interest on the Bonds has been paid in full or duly provided for, in which case they shall be dated such date of authentication; provided, however, that if, as shown by the records of the Trustee, interest on the Bonds shall be
in default, Bonds issued in exchange for Bonds surrendered for transfer or exchange shall be dated the date to which interest has been paid in full on the Bonds surrendered. 
 Principal of the Bonds shall be payable to the Owners of such Bonds upon presentation and surrender of such Bonds at the Principal Office of the Trustee. Interest on the Bonds shall be paid by check drawn
upon the Trustee and mailed to the Owners of such Bonds as of the close of business on the Record Date with respect to each interest payment date at the registered addresses of such Owners as they shall appear as of the close of business on such
Record Date on the registration books maintained pursuant to Section 2.08 hereof notwithstanding the cancellation of any such Bond upon any exchange or registration of transfer subsequent to such Record Date, except that if and to the extent
that there should be a default on the payment of interest on any Bond, such defaulted interest shall be paid to the Owners in whose name such Bond (or any Bond or Bonds issued upon any exchange or registration of transfer thereof) is registered as
of the close of business on a date selected by the Trustee in its discretion, but not more than fifteen (15) days or less than ten (10) days prior to the date of payment of such defaulted interest; notwithstanding the foregoing, upon
request to the Trustee by an Owner of not less than $1,000,000 in aggregate principal amount of Bonds, interest on such Bonds and, after presentation and surrender of such Bonds, the principal thereof shall be paid to such Owner by wire transfer to
the account maintained within the continental United States specified by such Owner or, if such Owner maintains an account with the entity acting as Trustee, by deposit into such account. Payment as aforesaid shall be made in such coin or currency
of the United States of America as, at the respective times of payment, shall be legal tender for the payment of public and private debts. 
 The Bonds and the form for registration of transfer and the form of certificate of authentication to be printed on the Bonds are to be in substantially the forms thereof set forth in Exhibits A, B and C
hereto, respectively, with necessary or appropriate variations, omissions and insertions as permitted or required by this Indenture. 
 Section 2.03 Execution of Bonds. The Bonds shall be executed on behalf of the Authority by the President or a Vice President of the Authority and shall be attested by the Secretary or an
Assistant Secretary of the Authority. Each of the foregoing officers may execute or cause to be executed the Bonds with a facsimile signature in lieu of a manual signature on the Bonds. 

In case any officer of the Authority whose signature or a facsimile of whose signature shall appear on the Bonds shall cease to be such
officer before the authentication by the Trustee and delivery of such Bonds, such signature or such facsimile shall nevertheless be valid and sufficient for all purposes, the same as if such officer had remained in office until delivery; and any
Bond may be signed on behalf of the Authority by such persons as, at the time of execution of such Bond, shall be the proper officers of the Authority, even though at the date of such Bond or of the execution and delivery of this Indenture any such
person was not such officer. 
 Section 2.04 Authentication of Bonds. Only such Bonds as shall have endorsed thereon
a certificate of authentication substantially in the form set forth in Exhibit C hereto duly executed by the Trustee shall be entitled to any right or benefit under this Indenture. No Bond shall be valid or obligatory for any purpose unless and
until such certificate of authentication shall have been duly executed by the Trustee, and such executed certificate of authentication of the Trustee upon any such Bonds shall be conclusive evidence that such Bond has been authenticated and
delivered under this Indenture. The Trustee’s certificate of authentication on any Bond shall be deemed to have been executed by it if signed with an authorized signature of the Trustee, but it shall not be necessary that the same person sign
the certificate of authentication on all of the Bonds issued hereunder. This Section 2.04 is subject to the provisions of Section 10.17 hereof. 

  
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 Section 2.05 Bonds Not General Obligations. Neither Pima County, Arizona nor the
State of Arizona shall in any event be liable for the payment of the principal of or premium, if any, or interest on the Bonds, and neither the Bonds nor the premium, if any, or the interest thereon, shall be construed to constitute an indebtedness
of Pima County, Arizona or the State of Arizona within the meaning of any constitutional or statutory provisions whatsoever. The Bonds and the premium, if any, and the interest thereon shall be limited obligations of the Authority payable solely
from the Receipts and Revenues of the Authority from the Loan Agreement and the other moneys pledged therefor under this Indenture, and such fact shall be plainly stated on each Bond. 

Section 2.06 Prerequisites to Authentication of Bonds. The Authority shall execute and deliver to the Trustee and the Trustee
shall authenticate the Bonds and deliver said Bonds to the initial purchasers thereof as may be directed hereinafter in this Section 2.06. 
 Prior to the delivery on original issuance by the Trustee of any authenticated Bonds there shall be or have been delivered to the Trustee: 

(a) a duly certified copy of a resolution of the Board of Directors of the Authority authorizing the execution and delivery of this
Indenture and the Loan Agreement and the issuance of the Bonds; 
 (b) an original duly executed counterpart or a duly certified
copy of the Loan Agreement; 
 (c) a request and authorization to the Trustee on behalf of the Authority, signed by any duly
authorized officer of the Authority, to authenticate and deliver the Bonds in the aggregate principal amount determined by this Indenture to the purchaser or purchasers therein identified upon payment to the Trustee, but for the account of the
Authority, of a sum specified in such request and authorization; and 
 (d) a written statement on behalf of the Company,
executed by the President, any Vice President or the Treasurer, (i) approving the issuance and delivery of the Bonds and (ii) consenting to each and every provision of this Indenture. 

Section 2.07 Lost or Destroyed Bonds or Bonds Canceled in Error. If any Bond, whether in temporary or definitive form, is
lost (whether by reason of theft or otherwise), destroyed (whether by mutilation, damage, in whole or in part, or otherwise) or canceled in error, the Authority may execute and the Trustee may authenticate a new Bond of like date and denomination
and bearing a number not contemporaneously outstanding; provided that (a) in the case of any mutilated Bond, such mutilated Bond shall first be surrendered to the Trustee and (b) in the case of any lost Bond or Bond destroyed in whole,
there shall be first furnished to the Authority, the Trustee and the Company evidence of such loss or destruction. In every case, the applicant for a substitute Bond shall furnish the Authority, the Trustee and the Company such security or indemnity
as may be required by any of them. In the event any lost or destroyed Bond or a Bond canceled in error shall have matured or is about to mature, or has been called for redemption, instead of issuing a substitute Bond the Trustee shall, if directed
in writing by the Authority or the Company, pay the same without surrender thereof if there shall be first furnished to the Authority, the Trustee and the Company evidence of such loss, destruction or cancellation, together with indemnity,
satisfactory to them. Upon the issuance of any substitute Bond, the Authority and the Trustee may require the payment of a sum sufficient to cover any tax or other governmental charge that may be imposed in relation thereto. The Trustee may charge
the Owner of any such Bond with the Trustee’s reasonable fees and expenses in connection with any transaction described in this Section 2.07. 

  
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 Every substitute Bond issued pursuant to the provisions of this Section 2.07 by virtue
of the fact that any Bond is lost, destroyed or canceled in error shall constitute an additional contractual obligation of the Authority, whether or not the Bond so lost, destroyed or canceled shall be at any time enforceable, and shall be entitled
to all the benefits of this Indenture equally and proportionately with any and all other Bonds duly issued hereunder. All Bonds shall be held and owned upon the express condition that, to the extent permitted by law, the foregoing provisions are
exclusive with respect to the replacement or payment of lost, destroyed or improperly canceled Bonds, notwithstanding any law or statute now existing or hereafter enacted. 
 Section 2.08 Transfer, Registration and Exchange of Bonds. The Trustee shall maintain and keep, at its Principal Office, books for the registration and registration of transfer of Bonds,
which, at all reasonable times, shall be open for inspection by the Authority and the Company; and, upon presentation for such purpose of any Bond entitled to registration or registration of transfer at the Principal Office of the Trustee, the
Trustee shall register or register the transfer in such books, under such reasonable regulations as the Trustee may prescribe. The Trustee shall make all necessary provisions to permit the exchange or registration of transfer of Bonds at its
Principal Office. 
 The transfer of any Bond shall be registered upon the registration books of the Trustee at the written
request of the Owner thereof or his attorney duly authorized in writing, upon surrender thereof at the Principal Office of the Trustee, together with a written instrument of transfer satisfactory to the Trustee duly executed by the Owner or his duly
authorized attorney. Upon the registration of transfer of any such Bond or Bonds, the Authority shall issue in the name of the transferee, in authorized denominations, a new Bond or Bonds in the same aggregate principal amount as the surrendered
Bond or Bonds. 
 The Authority and the Trustee may deem and treat the Owner of any Bond as the absolute owner of such Bond,
whether such Bond shall be overdue or not, for the purpose of receiving payment of, or on account of, the principal of and, except as provided in Section 2.02 hereof, interest on, such Bond and for all other purposes, and neither the Authority
nor the Trustee shall be affected by any notice to the contrary. All such payments so made to any such Owner or upon his order shall be valid and effective to satisfy and discharge the liability upon such Bond to the extent of the sum or sums so
paid. 
 Bonds, upon surrender thereof at the Principal Office of the Trustee may, at the option of the Owner thereof, be
exchanged for an equal aggregate principal amount of Bonds of any authorized denomination. 
 In all cases in which the
privilege of exchanging Bonds or registering the transfer of Bonds is exercised, the Authority shall execute and the Trustee shall authenticate and deliver Bonds in accordance with the provisions of this Indenture. For every such exchange or
registration of transfer of Bonds, whether temporary or definitive, the Authority or the Trustee may make a charge sufficient to reimburse it for any tax or other governmental charge required to be paid with respect to such exchange or registration
of transfer, which sum or sums shall be paid by the person requesting such exchange or registration of transfer as a condition precedent to the exercise of the privilege of making such exchange or registration of transfer. The Trustee shall not be
obligated (a) to make any such exchange or registration of transfer of Bonds during the fifteen (15) days next preceding the date on which notice of any proposed redemption of Bonds is given or (b) to make any exchange or registration
of transfer of any Bonds called for redemption. 
 The Bonds are to be initially registered in the name of Cede & Co.,
as nominee for the Depositary. Such Bonds shall not be transferable or exchangeable, nor shall any purported transfer be registered, except as follows: 
 (a) such Bonds may be transferred in whole, and appropriate registration of transfer effected, if such transfer is by such nominee to the Depositary, or by the Depositary to another nominee thereof, or by
any nominee of the Depositary to any other nominee thereof, or by the Depositary or any nominee thereof to any successor securities depositary or any nominee thereof; and 
 (b) such Bond may be exchanged for definitive Bonds registered in the respective names of the beneficial holders thereof, and thereafter shall be transferable without restriction, if: 

(i) the Depositary shall have notified the Company and the Trustee that it is unwilling or unable to continue to act as securities
depositary with respect to such Bonds and the Trustee shall not have been notified by the Company within ninety (90) days of the identity of a successor securities depositary with respect to such Bonds; 

  
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 (ii) the Company shall have delivered to the Trustee a written instrument to the effect
that such Bonds shall be so exchangeable on and after a date specified therein; or 
 (iii) (1) an Event of Default shall have
occurred and be continuing, (2) the Trustee shall have given notice of such Event of Default pursuant to Section 10.19 hereof and (3) there shall have been delivered to the Authority, the Company and the Trustee an opinion of counsel
to the effect that the interests of the beneficial owners of such Bonds in respect thereof will be materially impaired unless such owners become owners of definitive Bonds. 
 The Bonds delivered to the Depositary may contain a legend reflecting the foregoing restrictions on registration of transfer and exchange. 

Section 2.09 Other Obligations. The Authority expressly reserves the right to issue, to the extent permitted by law, but
shall not be obligated to issue, obligations under another indenture or indentures to provide additional funds to pay the cost of construction of the Facilities or to refund all or any principal amount of the Bonds, or any combination thereof.

 Section 2.10 Temporary Bonds. Pending the preparation of definitive Bonds, the Authority may execute and the
Trustee shall authenticate and deliver temporary Bonds. Temporary Bonds shall be issuable as registered Bonds without coupons, of any authorized denomination, and substantially in the form of the definitive Bonds but with such omissions, insertions
and variations as may be appropriate for temporary Bonds, all as may be determined by the Authority. Temporary Bonds may contain such reference to any provisions of this Indenture as may be appropriate. Every temporary Bond shall be executed by the
Authority and be authenticated by the Trustee upon the same conditions and in substantially the same manner, and with like effect, as the definitive Bonds. As promptly as practicable the Authority shall execute and shall furnish definitive Bonds and
thereupon temporary Bonds may be surrendered in exchange therefor without charge at the Principal Office of the Trustee, and the Trustee shall authenticate and deliver in exchange for such temporary Bonds a like aggregate principal amount of
definitive Bonds of authorized denominations. Until so exchanged the temporary Bonds shall be entitled to the same benefits under this Indenture as definitive Bonds. 
 Section 2.11 Cancellation of Bonds. All Bonds which shall have been surrendered to the Trustee for payment or redemption, and all Bonds which shall have been surrendered to the Trustee for
exchange or registration of transfer, shall be delivered to the Trustee for cancellation. All Bonds delivered to or acquired by the Trustee for cancellation shall be canceled and disposed of by the Trustee in accordance with its customary
procedures. The Trustee shall furnish to the Authority and the Company counterparts of certificates evidencing such cancellation and disposition and specifying such Bonds by number. 

Section 2.12 Payment of Principal and Interest. For the payment of interest on the Bonds, the Authority shall cause to be
deposited in the Bond Fund, on each interest payment date, solely out of the Receipts and Revenues of the Authority from the Loan Agreement and other moneys pledged therefor, an amount sufficient to pay the interest to become due on such interest
payment date. The obligation of the Authority to cause any such deposit to be made hereunder shall be reduced by the amount of moneys in the Bond Fund available on such interest payment date for the payment of interest on the Bonds. 

For the payment of the principal of the Bonds upon maturity, the Authority shall cause to be deposited in the Bond Fund, on the stated or
accelerated date of maturity, solely out of the Receipts and Revenues of the Authority from the Loan Agreement and other moneys pledged therefor, an amount sufficient to pay the principal of the Bonds. The obligation of the Authority to cause any
such deposit to be made hereunder shall be reduced by the amount of moneys in the Bond Fund available on the maturity date for the payment of the principal of the Bonds. 

  
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 Section 2.13 Applicability of Book-Entry Provisions. Anything in this Indenture
to the contrary notwithstanding, (a) the provisions of the Blanket Issuer Letter of Representations, dated February 17, 1998, between the Authority and The Depository Trust Company relating to the manner of and procedures for payment
and redemption of Bonds and related matters shall apply so long as such Depositary shall be the Owner of all Outstanding Bonds and (b) the Authority and the Trustee may enter into a similar agreement, on terms satisfactory to the Company, with
any subsequent Depositary and the provisions thereof shall apply so long as such Depositary shall be the Owner of all Outstanding Bonds. 
 ARTICLE III 
 REDEMPTION OF BONDS 

Section 3.01 Redemption Provisions. (a) The Bonds shall be subject to redemption by the Authority, at the direction of
the Company, on any date on or after June 1, 2022 in whole at any time or in part from time to time, at 100% of the principal amount thereof plus accrued interest, if any, to the redemption date. 

(b) The Bonds shall be subject to redemption by the Authority, at the direction of the Company, in whole at any time at 100% of the
principal amount thereof plus accrued interest, if any, to the redemption date, if: 
 (i) the Company shall have determined
that the continued operation of the Facilities is impracticable, uneconomical or undesirable for any reason; 
 (ii) all or
substantially all of the Facilities shall have been condemned or taken by eminent domain; or 
 (iii) the operation of the
Facilities shall have been enjoined or shall have otherwise been prohibited by, or shall conflict with, any order, decree, rule or regulation of any court or of any federal, state or local regulatory body, administrative agency or other governmental
body. 
 (c) The Bonds shall be subject to mandatory redemption by the Authority, at 100% of the principal amount thereof plus
accrued interest to the redemption date, on the 180th day (or such earlier date as may be designated by the Company) after a final determination by a court of competent jurisdiction or an administrative agency, to the effect that, as a result of a
failure by the Company to perform or observe any covenant, agreement or representation contained in the Loan Agreement, the interest payable on the Bonds is included for federal income tax purposes in the gross income of the owners thereof, other
than any owner of a Bond who is a “substantial user” of the Facilities or a “related person” within the meaning of Section 103(b)(13) of the 1954 Code. No determination by any court or administrative agency shall be
considered final for the purposes of this Section 3.01(c) unless the Company shall have been given timely notice of the proceeding which resulted in such determination and an opportunity to participate in such proceeding, either directly or
through an owner of a Bond, and until the conclusion of any appellate review sought by any party to such proceeding or the expiration of the time for seeking such review. The Bonds shall be redeemed either in whole or in part in such principal
amount that, in the opinion of Bond Counsel, the interest payable on the Bonds, including the Bonds remaining outstanding after such redemption, would not be included in the gross income of any owner thereof, other than an owner of a Bond who is a
“substantial user” of the Facilities or a “related person” within the meaning of Section 103(b)(13) of the 1954 Code. 
 Section 3.02 Selection of Bonds to be Redeemed. If less than all the Bonds shall be called for redemption under any provision of this Indenture permitting such partial redemption, the
particular Bonds or portions of Bonds to be redeemed shall be selected by the Trustee, in such manner as the Trustee in its discretion may deem proper, in the aggregate principal amount designated to the Trustee by the Company or otherwise as
required by this Indenture; provided, however, that if, as indicated in a certificate of an Authorized Company Representative delivered to the Trustee, the Company shall have offered to purchase all Bonds then Outstanding and less than all such
Bonds have been tendered to the Company for such purchase, the Trustee, at the direction of an Authorized Company Representative, shall select for redemption all such Bonds which shall not have been so tendered; and provided, further, that the
portion of any Bond to be redeemed shall be in the principal amount of $5,000 or some integral multiple thereof and that, in selecting Bonds for redemption, the Trustee shall treat each Bond as representing that number of Bonds which is obtained by
dividing the principal amount of such Bond by $5,000. If it is determined that one or more, but not all, of the $5,000 units of principal amount represented by any such Bond is to be called for redemption, then, upon notice of intention to redeem
such $5,000 unit or units, the Owner of such Bond shall forthwith surrender such Bond to the Trustee for (y) payment to such Owner of the redemption price (including the redemption premium, if any, and accrued interest to the date fixed for
redemption) of the $5,000 unit or units of principal amount called for redemption and (z) delivery to such Owner of a new Bond or Bonds in the aggregate principal amount of the unredeemed balance of the principal amount of any such Bond. Bonds
representing the unredeemed balance of the principal amount of any such Bond shall be delivered to the Owner thereof, without charge therefor. If the Owner of any such Bond of a denomination greater than $5,000 shall fail to present such Bond to the
Trustee for payment and exchange as aforesaid, such Bond shall, nevertheless, become due and payable on the date fixed for redemption to the extent of the $5,000 unit or units of principal amount called for redemption (and to that extent only).

  
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 Section 3.03 Procedure for Redemption. (a) In the event any of the Bonds
are called for redemption, the Trustee shall give notice, in the name of the Authority, of the redemption of such Bonds, which notice shall (i) specify the Bonds to be redeemed, the redemption date, the redemption price, and the place or places
where amounts due upon such redemption will be payable (which shall be the Principal Office of the Trustee) and, if less than all of the Bonds are to be redeemed, the numbers assigned to the Bonds to be redeemed, if any, and the portion of the
principal amount of any Bond to be redeemed in part, (ii) state any condition to such redemption and (iii) state that on the redemption date, and upon the satisfaction of any such condition, the Bonds or portions thereof to be redeemed
shall cease to bear interest. Such notice may set forth any additional information relating to such redemption. Such notice shall be given by Mail or Electronic Means at least thirty (30) days prior to the date fixed for redemption to the
Owners of the Bonds to be redeemed; provided, however, that failure duly to give such Notice by Mail or Electronic Means, or any defect therein, shall not affect the validity of any proceedings for the redemption of Bonds as to which there shall
have been no such failure or defect. If a notice of redemption shall be unconditional, or if the conditions of a conditional notice or redemption shall have been satisfied, then upon presentation and surrender of Bonds so called for redemption at
the place or places of payment, such Bonds shall be redeemed. The Trustee shall promptly deliver to the Company a copy of each such notice of redemption. 
 (b) With respect to any notice of redemption of Bonds in accordance with subsection (a) or (b) of Section 3.01 hereof, unless, upon the giving of such notice, such Bonds shall be deemed to
have been paid within the meaning of Article VIII hereof, such notice shall state that such redemption shall be conditional upon the receipt, by the Trustee at or prior to the opening of business on the date fixed for such redemption, of moneys
sufficient to pay the principal of and interest on such Bonds to be redeemed, and that if such moneys shall not have been so received said notice shall be of no force and effect and the Authority shall not be required to redeem such Bonds and such
failure to redeem shall not constitute an event of default hereunder. In the event that such notice of redemption contains such a condition and such moneys are not so received or any other condition specified in the notice of redemption shall not
have been met, the redemption shall not be made and the Trustee shall within a reasonable time thereafter give notice, in the manner in which the notice of redemption was given, that such moneys were not so received. 

(c) Any Bonds and portions of Bonds which have been duly selected for redemption shall cease to bear interest on the specified redemption
date provided that moneys sufficient to pay the principal of and interest on such Bonds shall be on deposit with the Trustee on the date fixed for redemption so that such Bonds will be deemed to be paid in accordance with Article VIII hereof.

 (d) Any notice of redemption delivered pursuant to Section 3.01(a) hereof may be revoked by the Company by written
notice delivered to the Trustee by the Company on or prior to the date set for redemption date. In the event that a notice of redemption is so revoked by the Company, such notice shall be of no force and effect, the redemption shall not be made,
such failure to redeem shall not constitute an Event of Default hereunder and the Trustee shall, within a reasonable time thereafter, give notice, in the manner in which the notice of redemption was given, that such notice of redemption was revoked
by the Company 
 Section 3.04 Payment of Redemption Price. For the redemption of any of the Bonds, the Authority
shall cause to be deposited in the Bond Fund, on the redemption date, solely out of the Receipts and Revenues of the Authority from the Loan Agreement, an amount sufficient to pay the principal of and interest to become due on such redemption date.
The obligation of the Authority to cause any such deposit to be made hereunder shall be reduced by the amount of moneys in the Bond Fund available on such redemption date for payment of the principal of and accrued interest on the Bonds to be
redeemed. 

  
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 Section 3.05 No Partial Redemption After Default. Anything in this Indenture to
the contrary notwithstanding, if there shall have occurred and be continuing an Event of Default defined in clause (a) or (b) of the first paragraph of Section 9.01 hereof, there shall be no redemption of less than all of the Bonds at
the time Outstanding other than a partial redemption in connection with an offer by the Company to purchase all Bonds Outstanding as contemplated in the first proviso to the first sentence of Section 3.02 hereof. 

ARTICLE IV 
 THE
BOND FUND 
 Section 4.01 Creation of Bond Fund. There is hereby created and established with the Trustee a trust
fund in the name of the Authority to be designated “The Industrial Development Authority of the County of Pima Industrial Development Revenue Bonds, 2012 Series A (Tucson Electric Power Company Project) Bond Fund”. The Trustee shall
establish and maintain within the Bond Fund such segregated subaccounts as may be requested in writing by an Authorized Company Representative. The Bond Fund, and all moneys and certificated securities therein, shall be kept in the possession of the
Trustee. 
 Section 4.02 Liens. The Authority shall not create any lien upon the Bond Fund or upon the Receipts and
Revenues of the Authority from the Loan Agreement other than the lien hereby created. 
 Section 4.03 Deposits into Bond
Fund. (a) There shall be deposited into the Bond Fund: 
 (i) all Loan Payments; and 

(ii) all other moneys received by the Trustee under and pursuant to any provision of the Loan Agreement, other than Sections 5.03, 5.04
and 8.05 thereof, or from any other source when accompanied by directions by the Company that such moneys are to be paid into the Bond Fund. 
 (b) All income or other gain from the investment of moneys in the Bond Fund shall be retained therein. 
 Section 4.04 Use of Moneys in Bond Fund. Moneys, if any, paid into the Bond Fund pursuant to clause (i) of Section 4.03(a) hereof shall be applied to the payment of interest on the
Bonds. Except as otherwise provided in Section 4.06, Section 9.01, and Section 10.04 hereof, all other moneys in the Bond Fund constituting part of the Trust Estate shall be used solely for the payment of the principal of and interest
on the Bonds as the same shall become due and payable at maturity, upon redemption or otherwise. 
 Section 4.05 Custody
of Bond Fund; Withdrawal of Moneys. The Bond Fund shall be in the custody of the Trustee but in the name of the Authority and the Authority hereby authorizes and directs the Trustee to withdraw from the Bond Fund funds constituting part of the
Trust Estate sufficient to pay the principal of and interest on the Bonds as the same shall become due and payable, and to withdraw from the Bond Fund funds sufficient to pay any other amounts payable therefrom as the same shall become due and
payable. 
 Section 4.06 Bonds Not Presented for Payment. In the event any Bonds shall not be presented for payment
when the principal thereof becomes due, either at maturity or at the date fixed for redemption thereof or otherwise, if moneys sufficient to pay such Bonds are held by the Trustee for the benefit of the Owners thereof, the Trustee shall segregate
and hold such moneys in trust, without liability for interest thereon, for the benefit of the Owners of such Bonds, who shall, except as provided in the following paragraph, thereafter be restricted exclusively to such fund or funds for the
satisfaction of any claim of whatever nature on their part under this Indenture or relating to said Bonds. 

  
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 Any moneys which the Trustee shall segregate and hold in trust for the payment of the
principal of or interest on any Bond and remaining unclaimed for one (1) year after such principal or interest has become due and payable shall be paid to the Company; provided, however, that before the Trustee shall be required to make any
such repayment, the Trustee shall, at the expense of the Company cause notice to be given by Mail or Electronic Means to the effect that such money remains unclaimed and that, after a date specified therein, which shall not be less than thirty
(30) days from the date of such notice by Mail or Electronic Means, any unclaimed balance of such moneys then remaining will be paid to the Company. After the payment of such unclaimed moneys to the Company, the Owner of such Bond shall
thereafter look only to the Company for the payment thereof, and all liability of the Authority and the Trustee with respect to such moneys shall thereupon cease. 
 Section 4.07 Moneys Held in Trust. All moneys and Investment Securities held by the Trustee in the Bond Fund, and all moneys required to be deposited with or paid to the Trustee for deposit
into the Bond Fund, and all moneys withdrawn from the Bond Fund and held by the Trustee, shall be held by the Trustee, in trust, and such moneys and Investment Securities (other than moneys held pursuant to Section 4.06 hereof and moneys or
Investment Securities held in the Rebate Fund established in furtherance of the obligations of the Company under clause (b) of Section 6.04 of the Loan Agreement), while so held or so required to be deposited or paid, shall constitute part
of the Trust Estate and be subject to the lien and security interest created hereby in favor of the Trustee, for the benefit of the Owners from time to time of the Bonds. The Company shall have no right, title or interest in the Bond Fund, except
such rights as may arise after the right, title and interest of the Trustee in and to the Trust Estate and all covenants, agreements and other obligations of the Authority under this Indenture shall have ceased, terminated and become void and shall
have been satisfied and discharged in accordance with Article VIII hereof. 
 ARTICLE V 

DISPOSITION OF PROCEEDS 
 Section 5.01 Disposition of Proceeds. The proceeds from the issuance and sale of the Bonds shall be applied as provided in Section 4.03 of the Loan Agreement. 

ARTICLE VI 

INVESTMENTS 

Section 6.01 Investments. The moneys in the Bond Fund shall, at the written direction of the Company, be invested and
reinvested in Investment Securities. Any Investment Securities may be purchased subject to options or other rights in third parties to acquire the same. In addition, the Trustee shall, at the written direction of the Company, enter into
(i) reverse repurchase agreements and option agreements with respect to any Investment Securities held by it and (ii) transactions for the purchase or sale of financial futures contracts in obligations which constitute Investment
Securities or options on financial futures contracts in obligations which constitute Investment Securities. Subject to the further provisions of this Section 6.01, such investments shall be made by the Trustee as specifically directed and
designated by the Company in a certificate of, or telephonic advice promptly confirmed by a certificate of, an Authorized Company Representative. As and when any amounts thus invested may be needed for disbursements from the Bond Fund, the Trustee
shall request the Company to designate such investments to be sold or otherwise converted into cash to the credit of the Bond Fund as shall be sufficient to meet such disbursement requirements and shall then follow any directions in respect thereto
of an Authorized Company Representative. As long as no Event of Default (as defined in Section 9.01 hereof) shall have occurred and be continuing, the Company shall have the right to designate the investments to be sold and to otherwise direct
the Trustee in the sale or conversion to cash of the investments made with the moneys in the Bond Fund, provided that the Trustee shall be entitled to conclusively assume the absence of any such Event of Default unless it has notice thereof within
the meaning of Section 10.05 hereof. 

  
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 ARTICLE VII 
 GENERAL COVENANTS 
 Section 7.01 No General Obligations. Each and
every covenant herein made, including all covenants made in the various sections of this Article VII, is predicated upon the condition that neither Pima County, Arizona nor the State of Arizona shall in any event be liable for the payment of the
principal of, or premium, if any, or interest on the Bonds or for the performance of any pledge, mortgage, obligation or agreement created by or arising out of this Indenture or the issuance of the Bonds, and further that neither the Bonds, nor the
premium, if any, or interest thereon, nor any such obligation or agreement of the Authority shall be construed to constitute an indebtedness of Pima County, Arizona or the State of Arizona within the meaning of any constitutional or statutory
provisions whatsoever. The Bonds and the interest and premium, if any, thereon shall be limited obligations of the Authority payable solely from the Receipts and Revenues of the Authority from the Loan Agreement and the other moneys pledged
therefor. 
 The Authority shall promptly cause to be paid, solely from the sources stated herein, the principal of and premium,
if any, and interest on every Bond issued under this Indenture at the place, on the dates and in the manner provided herein and in said Bonds according to the true intent and meaning thereof. 

Section 7.02 Performance of Covenants of the Authority; Representations. The Authority shall faithfully perform at all times
any and all covenants, undertakings, stipulations and provisions contained in this Indenture, in any and every Bond executed, authenticated and delivered hereunder, and in all proceedings pertaining thereto. The Authority represents that it is duly
authorized under the Constitution and laws of the State of Arizona to issue the Bonds authorized hereby, to enter into the Loan Agreement and this Indenture, and to pledge and assign to the Trustee the Trust Estate, and that the Bonds in the hands
of the Owners thereof are and will be valid and binding limited obligations of the Authority. 
 Section 7.03
Maintenance of Rights and Powers; Compliance with Laws. The Authority shall at all times use its best efforts to maintain its corporate existence or assure the assumption of its obligations under this Indenture by any public body succeeding to
its powers under the Act; and it shall at all times use its best efforts to comply with all valid acts, rules, regulations, orders and directions of any legislative, executive, administrative or judicial body known to it to be applicable to the Loan
Agreement and this Indenture. 
 Section 7.04 Enforcement of Obligations of the Company; Amendments. Upon receipt of
written notification from the Trustee, the Authority shall cooperate with the Trustee in enforcing the obligation of the Company to pay or cause to be paid all the payments and other costs and charges payable by the Company under the Loan Agreement.
The Authority shall not enter into any agreement with the Company amending the Loan Agreement without the prior written consent of the Trustee and compliance with Section 12.06 or Section 12.07 of this Indenture (a revision to Exhibit A to
the Loan Agreement not being deemed an amendment for purposes of this Section). The Authority shall not enter into any agreement with the Trustee amending this Indenture without the prior written consent of the Company and compliance with
Section 12.01 and Section 12.02 or Section 12.03 of this Indenture. 
 Section 7.05 Further Instruments.
The Authority shall, upon the reasonable request of the Trustee, from time to time execute and deliver such further instruments and take such further action as may be reasonable and as may be required to carry out the purposes of this Indenture;
provided, however, that no such instruments or actions shall pledge the credit or taxing power of the State of Arizona, Pima County, the Authority or any other political subdivision of said State. 

Section 7.06 No Disposition of Trust Estate. Except as permitted by this Indenture, the Authority shall not sell, lease,
pledge, assign or otherwise dispose of or encumber its interest in the Trust Estate and will promptly pay or cause to be discharged or make adequate provision to discharge any lien or charge on any part thereof not permitted hereby. 

Section 7.07 Financing Statements. The Authority and the Trustee shall cooperate with the Company in causing appropriate
financing statements, naming the Trustee as pledgee of the Receipts and Revenues of the Authority from the Loan Agreement and of the other moneys pledged under the Indenture for the payment of the principal of and interest on the Bonds, and as
pledgee and assignee of the balance of the Trust Estate, and the Authority shall cooperate with the Trustee and the Company in causing appropriate continuation statements to be duly filed and recorded in the appropriate state and county offices as
required by the provisions of the Uniform Commercial Code or other similar law as adopted in the State of Arizona and any other applicable jurisdiction, as from time to time amended, in order to perfect and maintain the security interests created by
this Indenture. 

  
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 Section 7.08 Tax Covenants; Rebate Fund. (a) The Authority covenants for
the benefit of all Owners from time to time of the Bonds that it will not directly or indirectly use, or (to the extent within its control) permit the use of, the proceeds of any of the Bonds or any other funds of the Authority, or take or omit to
take any other action, if and to the extent that such use, or the taking or omission to take such action, would cause any of the Bonds to be “arbitrage bonds” within the meaning of Section 148 of the Code or otherwise subject to
federal income taxation by reason of failing to qualify under Section 103 of the 1954 Code and Title XIII of the Tax Reform Act of 1986, as applicable, and any applicable regulations promulgated thereunder. To that end the Authority covenants
to comply with all covenants set forth in the Tax Agreement, which is hereby incorporated herein by reference as though fully set forth herein. 
 (b) The Trustee shall establish and maintain a fund separate from any other fund established and maintained hereunder designated “The Industrial Development Authority of the County of Pima Industrial
Development Revenue Bonds, 2012 Series A (Tucson Electric Power Company Project) Rebate Fund” (herein called the “Rebate Fund”) in accordance with the provisions of the Tax Agreement. Within the Rebate Fund, the Trustee shall maintain
such accounts as shall be directed by the Company in order for the Authority and the Company to comply with the provisions of the Tax Agreement. Subject to the transfer provisions provided in paragraph (c) below, all money at any time deposited
in the Rebate Fund shall be held by the Trustee in trust, to the extent required to satisfy the Rebate Requirement (as defined in the Tax Agreement), for payment to the United States of America, and neither the Company, the Authority or the Owners
shall have any rights in or claim to such moneys. All amounts deposited into or on deposit in the Rebate Fund shall be governed by this Section 7.08, by Section 6.04 of the Loan Agreement and by the Tax Agreement. The Trustee shall
conclusively be deemed to have complied with such provisions if it follows the directions of the Company, including supplying all necessary information in the manner set forth in the Tax Agreement, and shall not be required to take any actions
thereunder in the absence of written directions from the Company. 
 (c) Upon receipt of the Company’s written
instructions, the Trustee shall remit part or all of the balances in the Rebate Fund to the United States of America, as so directed. In addition, if the Company so directs, the Trustee shall deposit moneys into or transfer moneys out of the Rebate
Fund from or into such accounts or funds as directed by the Company’s written directions. Any funds remaining in the Rebate Fund after all of the Bonds shall have been paid and any Rebate Requirement shall have been satisfied, or provision
therefor reasonably satisfactory to the Trustee shall have been made, shall be withdrawn and remitted to the Company. 
 (d)
Notwithstanding any provision of this Indenture, the obligation to remit the Rebate Requirement to the United States of America and to comply with all other requirements of this Section 7.08, Section 6.04 of the Loan Agreement and the Tax
Agreement shall survive the payment of the Bonds and the satisfaction and discharge of this Indenture. 
 ARTICLE VIII

 DEFEASANCE 
 Section 8.01 Defeasance. If the Authority shall pay or cause to be paid to the Owner of any Bond secured hereby the principal of and interest due and payable, and thereafter to become due and
payable, upon such Bond or any portion of such Bond in the principal amount of $5,000 or any integral multiple thereof, such Bond or portion thereof shall cease to be entitled to any lien, benefit or security under this Indenture. If the Authority
shall pay or cause to be paid to the Owners of all the Bonds secured hereby the principal of and interest due and payable, and thereafter to become due and payable, thereon, and shall pay or cause to be paid all other sums payable hereunder
including, without limitation, amounts payable pursuant to Section 10.04 hereof, then, and in that case, the right, title and interest of the Trustee in and to the Trust Estate shall thereupon cease, terminate and become void. In such event,
the Trustee shall assign, transfer and turn over to the Company the Trust Estate, including, without limitation, any surplus in the Bond Fund and any balance remaining in any other fund created under this Indenture. 

All or any portion of Outstanding Bonds or portions of Bonds in principal amounts of $5,000 or any integral multiple thereof, shall prior
to the maturity or redemption date thereof be deemed to have been paid within the meaning and with the effect expressed in this Article VIII, and the entire indebtedness of the Authority with respect thereof shall be satisfied and discharged, when

  
 16 

 (a) in the event said Bonds or portions thereof have been selected for redemption in
accordance with Section 3.02 hereof, the Trustee shall have given, or the Company shall have given to the Trustee in form satisfactory to it irrevocable instructions to give, on a date in accordance with the provisions of Section 3.03
hereof, notice of redemption of such Bonds or portions thereof, 
 (b) there shall have been deposited with the Trustee either
moneys in an amount which shall be sufficient, or Government Obligations which shall not contain provisions permitting the redemption thereof at the option of the issuer, the principal of and the interest on which, when due, and without regard to
any reinvestment thereof, will provide moneys which, together with the moneys, if any, deposited with or held by the Trustee, shall be sufficient, to pay when due the principal of and interest due and to become due on said Bonds or portions thereof
on and prior to the redemption date or maturity date thereof, as the case may be, and 
 (c) in the event said Bonds or portions
thereof do not mature and are not to be redeemed within the next succeeding sixty (60) days, the Company shall have given the Trustee in form satisfactory to it irrevocable instructions to give, as soon as practicable in the same manner as a
notice of redemption is given pursuant to Section 3.03 hereof, a notice to the Owners of said Bonds or portions thereof that the deposit required by clause (b) above has been made with the Trustee and that said Bonds or portions thereof
are deemed to have been paid in accordance with this Article VIII and stating the maturity or redemption date upon which moneys are to be available for the payment of the principal of and interest on said Bonds or portions thereof. 

Neither the Government Obligations nor moneys deposited with the Trustee pursuant to this Article VIII nor principal or interest payments
on any such Government Obligations shall be withdrawn or used for any purpose other than, and such Government Obligations, moneys and principal or interest payments shall be held in trust for, the payment of the principal of and interest on said
Bonds or portions thereof; provided, that any cash received from such principal or interest payments on such Government Obligations deposited with the Trustee, if not then needed for such purposes, shall, to the extent practicable, be invested in
Government Obligations of the type described in clause (b) of the preceding paragraph maturing at times and in amounts sufficient to pay when due the principal of and interest to become due on said Bonds or portions thereof on and prior to such
redemption date or maturity date thereof, as the case may be, and interest earned from such reinvestments shall be paid over to the Company, as received by the Trustee, free and clear of any trust, lien or pledge hereunder. If payment of less than
all the Bonds is to be provided for in the manner and with the effect provided in this Article VIII, the Trustee shall select such Bonds or portions of Bonds in the manner specified by Section 3.02 hereof for selection for redemption of less
than all Bonds in the principal amount designated to the Trustee by the Company. At or prior to the time of the deposit of any Government Obligations with the Trustee pursuant to this Section 8.01, the Company shall provide the Trustee with a
certificate of an accountant or an accounting firm as to the sufficiency of such Government Obligations to pay when due the principal of and interest due and to become due as set forth in clause (b) of the preceding paragraph. 

ARTICLE IX 

DEFAULTS AND REMEDIES 
 Section 9.01 Events of Default. Each of the following events shall constitute and is referred to in this Indenture as an “Event of Default”: 

(a) a failure to pay the principal of any of the Bonds when the same shall become due and payable at maturity, upon redemption or
otherwise; 
 (b) a failure to pay an installment of interest on any of the Bonds after such interest shall have become due and
payable for a period of thirty (30) days; 
 (c) a failure by the Authority to observe and perform any covenant, condition,
agreement or provision (other than as specified in clauses (a) and (b) of this Section 9.01) contained in the Bonds or in this Indenture on the part of the Authority to be observed or performed, which failure shall continue for a
period of sixty (60) days after written notice, specifying such failure and requesting that it be remedied, shall have been given to the Authority and the Company by the Trustee, which may give such notice in its discretion and which shall give
such notice at the written request of Owners of not less than a majority of the principal amount of the Bonds then Outstanding, unless the Trustee, or the Trustee and Owners of a principal amount of Bonds not less than the principal amount of Bonds
the Owners of which requested that such notice be given, as the case may be, shall agree in writing to an extension of such period prior to its expiration; provided, however, that the Trustee, or the Trustee and the Owners of such principal amount
of Bonds, as the case may be, shall be deemed to have agreed to an extension of such period if corrective action is initiated by the Authority, or the Company on behalf of the Authority, within such period and is being diligently pursued.

  
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 Upon the occurrence and continuance of any Event of Default described in clause (a) or
(b) of the preceding paragraph, the Trustee may, and at the written request of Owners of not less than a majority of the principal amount of Bonds then Outstanding shall, by written notice to the Authority and the Company, declare the Bonds to
be immediately due and payable, whereupon they shall, without further action, become and be immediately due and payable, anything in this Indenture or in the Bonds to the contrary notwithstanding, and the Trustee shall give notice thereof by Mail or
Electronic Means to all Owners of Outstanding Bonds. 
 The provisions of the preceding paragraph, however, are subject to the
condition that if, after the principal of the Bonds shall have been so declared to be 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 Authority
shall cause to be deposited with the Trustee a sum sufficient to pay all matured installments of interest upon all Bonds and the principal of any and all Bonds which shall have become due otherwise than by reason of such declaration (with interest
upon such principal and, to the extent permissible by law, on overdue installments of interest, at the rate per annum borne by the Bonds) and such amounts as shall be sufficient to cover reasonable compensation and reimbursement of expenses payable
to the Trustee and any predecessor Trustee, and all Events of Default hereunder other than nonpayment of the principal of Bonds which shall have become due by said declaration shall have been remedied, then, in every such case, such Event of Default
shall be deemed waived and such declaration and its consequences rescinded and annulled, and the Trustee shall promptly give written notice of such waiver, rescission and annulment to the Authority and the Company, and, if notice of the acceleration
of the Bonds shall have been given to the Owners of the Bonds, shall give notice thereof by Mail or Electronic Means to all Owners of Outstanding Bonds; but no such waiver, rescission and annulment shall extend to or affect any subsequent Event of
Default or impair any right or remedy consequent thereon. 
 Section 9.02 Remedies. Upon the occurrence and
continuance of any Event of Default, then and in every such case the Trustee in its discretion may, and upon the written request of Owners of not less than a majority in principal amount of the Bonds then Outstanding and receipt of indemnity to its
satisfaction shall, in its own name and as the Trustee of an express trust: 
 (a) by mandamus, or other suit, action or
proceeding at law or in equity, enforce all rights of the Owners of the Bonds, and require the Authority or the Company to carry out any agreements with or for the benefit of such Owners and to perform its or their duties under the Act, the Loan
Agreement and this Indenture; 
 (b) bring suit upon the Bonds; or 

(c) by action or suit in equity enjoin any acts or things which may be unlawful or in violation of the rights of the Owners of the Bonds.

 Section 9.03 Restoration to Former Position. In the event that any proceeding taken by the Trustee to enforce any
right under this Indenture shall have been discontinued or abandoned for any reason, or shall have been determined adversely to the Trustee, then the Authority, the Trustee and the Owners shall be restored, subject to any determination in such
proceeding, to their former positions and rights hereunder, respectively, and all rights, remedies and powers of the Trustee shall continue as though no such proceeding had been taken. 

Section 9.04 Owners’ Right to Direct Proceedings. Anything in this Indenture to the contrary notwithstanding, the Owners
of a majority in principal amount of the Bonds then Outstanding hereunder shall have the right, by an instrument in writing executed and delivered to the Trustee, to direct the time, method and place of conducting all remedial proceedings available
to the Trustee under this Indenture or exercising any trust or power conferred on the Trustee by this Indenture; provided, however, that such direction shall not be otherwise than in accordance with law and the provisions of this Indenture and that
the Trustee shall have the right (but not the obligation) to decline to follow any such direction if the Trustee, being advised by counsel, shall determine that the action or proceeding so directed may not lawfully be taken, or if the Trustee in
good faith shall determine that the action or proceedings so directed would involve the Trustee in personal liability or if the Trustee in good faith shall so determine that the actions or forbearances specified in or pursuant to such direction
would be unduly prejudicial to the interests of Owners not joining in the giving of said direction, it being understood that the Trustee shall have no duty to ascertain whether or not such actions or forbearances are unduly prejudicial to such
Owners. 

  
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 Section 9.05 Limitation on Owners’ Right to Institute Proceedings. No Owner
of Bonds shall have any right to institute any suit, action or proceeding in equity or at law for the execution of any trust or power hereunder, or any other remedy hereunder or on said Bonds, unless such Owner previously shall have given to the
Trustee written notice of an Event of Default as hereinabove provided and unless the Owners of not less than a majority in principal amount of the Bonds then Outstanding shall have made written request of the Trustee so to do, after the right to
institute said suit, action or proceeding shall have accrued, and shall have afforded the Trustee a reasonable opportunity to proceed to institute the same in either its or their name, and unless there also shall have been offered to the Trustee
security and indemnity satisfactory to it against the costs, expenses and liabilities to be incurred therein or thereby, and the Trustee shall not have complied with such request within a reasonable time; and such notification, request and offer of
indemnity are hereby declared in every such case, at the option of the Trustee, to be conditions precedent to the institution of said suit, action or proceeding; it being understood and intended that no one or more of the Owners of the Bonds shall
have any right in any manner whatever by his or their action to affect, disturb or prejudice the security of this Indenture, or to enforce any right hereunder or under the Bonds, except in the manner herein provided, and that all suits, actions and
proceedings at law or in equity shall be instituted, had and maintained in the manner herein provided and for the equal benefit of all Owners of the Bonds. 
 Section 9.06 No Impairment of Right to Enforce Payment. Notwithstanding any other provision in this Indenture, the right of any Owner of a Bond to receive payment of the principal of and
interest on such Bond, on or after the respective due dates expressed therein, or to institute suit for the enforcement of any such payment on or after such respective dates, shall not be impaired or affected without the consent of such Owner.

 Section 9.07 Proceedings by Trustee without Possession of Bonds. All rights of action under this Indenture or
under any of the Bonds secured hereby which are enforceable by the Trustee may be enforced by it without the possession of any of the Bonds, or the production thereof on the trial or other proceedings relative thereto, and any such suit, action or
proceeding instituted by the Trustee shall be brought in its name for the equal and ratable benefit of the Owners of the Bonds, subject to the provisions of this Indenture. 
 Section 9.08 No Remedy Exclusive. No remedy herein conferred upon or reserved to the Trustee or to the Owners of the Bonds is intended to be exclusive of any other remedy or remedies, and each
and every such remedy shall be cumulative, and shall be in addition to every other remedy given hereunder or under the Loan Agreement, now or hereafter existing at law or in equity or by statute. 

Section 9.09 No Waiver of Remedies. No delay or omission of the Trustee or of any Owner of a Bond to exercise any right or
power accruing upon any default shall impair any such right or power or shall be construed to be a waiver of any such default, or an acquiescence therein; and every power and remedy given by this Article IX to the Trustee and to the Owners of the
Bonds, respectively, may be exercised from time to time and as often as may be deemed expedient. 
 Section 9.10
Application of Moneys. Any moneys received by the Trustee, by any receiver or by any Owner of a Bond pursuant to any right given or action taken under the provisions of this Article IX, after payment of the costs and expenses of the proceedings
resulting in the collection of such moneys and of all amounts due to the Trustee and any predecessor Trustee under Section 10.04 hereof, shall be deposited in the Bond Fund and all moneys so deposited in the Bond Fund during the continuance of
an Event of Default (other than moneys for the payment of Bonds which had matured or otherwise become payable prior to such Event of Default or for the payment of interest due prior to such Event of Default) shall be applied as follows: 

  
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 (a) Unless the principal of all the Bonds shall have become due and payable, all such moneys
shall be applied (i) first, to the payment to the persons entitled thereto of all installments of interest then due on the Bonds, with interest on overdue installments, if lawful, at the rate per annum borne by the Bonds, in the order of
maturity of the installments of such interest and, if the amount available shall not be sufficient to pay in full any particular installment of interest, then to the payment ratably, according to the amounts due on such installment, and
(ii) second, to the payment to the persons entitled thereto of the unpaid principal of any of the Bonds which shall have become due (other than Bonds called for redemption for the payment of which money is held pursuant to the provisions of
this Indenture), with interest on such Bonds at their rate from the respective dates upon which they became due and, if the amount available shall not be sufficient to pay in full Bonds due on any particular date, together with such interest, then
to the payment ratably, according to the amount of principal and interest due on such date, in each case to the persons entitled thereto, without any discrimination or privilege. 

(b) If the principal of all the Bonds shall have become due and payable, all such moneys shall be applied to the payment of the principal
and interest then due and unpaid upon the Bonds, with interest on overdue interest and principal, as aforesaid, without preference or priority of principal over interest or of interest over principal, or of any installment of interest over any other
installment of interest, or of any Bond over any other Bond, ratably, according to the amounts due respectively for principal and interest, to the persons entitled thereto without any discrimination or privilege. 

(c) If the principal of all the Bonds shall have become due and payable, and if acceleration of the maturity of the Bonds by reason of
such Event of Default shall thereafter have been rescinded and annulled under the provisions of this Article IX, then, subject to the provisions of clause (b) of this Section 9.10 which shall be applicable in the event that the principal
of all the Bonds shall later become due and payable, the moneys shall be applied in accordance with the provisions of clause (a) of this Section 9.10. 
 Section 9.11 Severability of Remedies. It is the purpose and intention of this Article IX to provide rights and remedies to the Trustee and the Owners which may be lawfully granted under the
provisions of the Act, but should any right or remedy herein granted be held to be unlawful, the Trustee and the Owners shall be entitled, as above set forth, to every other right and remedy provided in this Indenture and by law. 

ARTICLE X 

TRUSTEE 

Section 10.01 Acceptance of Trusts. The Trustee hereby accepts and agrees to execute the trusts hereby created, but only upon
the additional terms set forth in this Article X, to all of which the Authority agrees and the respective Owners agree by their acceptance of delivery of any of the Bonds. 
 Section 10.02 No Responsibility for Recitals. The recitals, statements and representations contained in this Indenture or in the Bonds, save only the Trustee’s authentication upon the
Bonds, are not made by the Trustee, and the Trustee does not assume, and shall not have, any responsibility or obligation for the correctness of any thereof. The Trustee makes no representation as to the validity or sufficiency of this Indenture or
the Bonds. 
 Section 10.03 Limitations on Liability. The Trustee may execute any of the trusts or powers hereof and
perform the duties required of it hereunder by or through attorneys, agents, receivers, or employees, and shall be entitled to advice of counsel concerning all matters of trust and its duty hereunder, and the Trustee shall not be answerable for the
default or misconduct of any such attorney, agent, receiver, or employee selected by it with reasonable care. The Trustee shall not be answerable for the exercise of any discretion or power under this Indenture or for anything whatsoever in
connection with the trust created hereby, except only for its own negligence or willful misconduct. 
 Anything in this
Indenture to the contrary notwithstanding, the Trustee shall in no event be required to expend or risk its own funds or otherwise incur personal financial liability in the performance of any of its duties or in the exercise of any of its rights or
powers, if there shall be reasonable grounds for believing that the repayment of such funds or adequate indemnity against such liability is not reasonably assured to it. 

  
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 Section 10.04 Compensation, Expenses and Advances. The Trustee under this
Indenture shall be entitled to reasonable compensation for its services rendered hereunder (not limited by any provision of law regarding the compensation of the trustee of an express trust) and to reimbursement for its actual out-of-pocket expenses
(including counsel fees and expenses) reasonably incurred in connection therewith except as a result of its negligence or willful misconduct, including, without limitation, compensation for any services rendered, and reimbursement for any expenses
incurred, at and subsequent to the time the Bonds are deemed to have been paid in accordance with Article VIII hereof. In Section 5.03 of the Loan Agreement, the Company has agreed that it will pay to the Trustee (including any predecessor
Trustee) such compensation and reimbursement of expenses and advances, but the Company may, without creating a default hereunder, contest in good faith the reasonableness of any such services, expenses and advances. If the Company shall have failed
to make any payment to the Trustee or any predecessor Trustee under Section 5.03 of the Loan Agreement and such failure shall have resulted in an Event of Default under the Loan Agreement, the Trustee, and any predecessor Trustee, shall have,
in addition to any other rights hereunder, a claim, prior to the claim of the Owners, for the payment of its compensation and the reimbursement of its expenses and any advances made by it, as provided in this Section 10.04, upon the moneys and
obligations in the Bond Fund; provided, however, that neither the Trustee nor any predecessor Trustee shall have any such claim upon moneys or obligations deposited with or paid to the Trustee for the redemption or payment of Bonds which are deemed
to have been paid in accordance with Article VIII hereof. 
 In Section 5.04 of the Loan Agreement, the Company has agreed
to indemnify the Trustee and any predecessor Trustee to the extent provided therein. The provisions of this section shall survive the termination of this Indenture. 
 Section 10.05 Notice of Events of Default. The Trustee shall not be required to take notice, or be deemed to have notice, of any default or Event of Default under this Indenture other than an
Event of Default under clause (a) or (b) of the first paragraph of Section 9.01 hereof, unless an officer assigned by the Trustee to administer its corporate trust business has been specifically notified in writing of such default or
Event of Default by Owners of at least a majority of the principal amount of the Bonds then Outstanding. The Trustee may, however, at any time, in its discretion, require of the Authority and the Company full information and advice as to the
performance of any of the covenants, conditions and agreements contained herein. 
 Section 10.06 Action by Trustee.
The Trustee shall be under no obligation to take any action in respect of any default or Event of Default hereunder or toward the execution or enforcement of any of the trusts hereby created, or to institute, appear in or defend any suit or
other proceeding in connection therewith, unless requested in writing so to do by Owners of at least a majority in principal amount of the Bonds then Outstanding, and, if in its opinion such action may tend to involve it in expense or liability,
unless furnished, from time to time as often as it may require, with security and indemnity satisfactory to it. The foregoing provisions are intended only for the protection of the Trustee, and shall not affect any discretion or power given by any
provisions of this Indenture to the Trustee to take action in respect of any default or Event of Default without such notice or request from the Owners of the Bonds, or without such security or indemnity. 

Section 10.07 Good Faith Reliance. The Trustee shall be protected and shall incur no liability in acting or proceeding in
good faith upon any resolution, notice, telegram, e-mail, facsimile transmission, request, consent, waiver, certificate, statement, affidavit, voucher, bond, requisition or other paper or document which it shall in good faith believe to be genuine
and to have been passed or signed by the proper board, body or person or to have been prepared and furnished pursuant to any of the provisions of this Indenture or the Loan Agreement, or upon the written opinion of any attorney, engineer, accountant
or other expert believed by the Trustee to be qualified in relation to the subject matter, and the Trustee shall be under no duty to make any investigation or inquiry as to any statements contained or matters referred to in any such instrument, but
may accept and conclusively rely upon the same as conclusive evidence of the truth and accuracy of such statements. The Trustee shall not be bound to recognize any person as an Owner of a Bond or to take any action at his request unless the
ownership of such Bond is proved as contemplated in Section 11.01 hereof. 
 Section 10.08 Dealings in Bonds and
with the Authority and the Company. The Trustee, in its individual or any other capacity, may in good faith buy, sell, own, hold and deal in any of the Bonds issued hereunder, and may join in any action which any Owner of a Bond may be entitled
to take with like effect as if it did not act in any capacity hereunder. The Trustee, in its individual or any other capacity, either as principal or agent, may also engage in or be interested in any financial or other transaction with the Authority
or the Company, and may act as depositary, trustee, or agent for any committee or body of Owners of Bonds secured hereby or other obligations of the Authority as freely as if it did not act in any capacity hereunder. 

  
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 Section 10.09 Allowance of Interest. The Trustee may, but shall not be obligated
to, allow and credit interest upon any moneys which it may at any time receive under any of the provisions of this Indenture, at such rate, if any, as it customarily allows upon similar funds of similar size and under similar conditions. All
interest allowed on any such moneys shall be credited as provided in Article IV with respect to interest on investments. 

Section 10.10 Construction of Indenture. The Trustee may construe any of the provisions of this Indenture insofar as the same
may appear to be ambiguous or inconsistent with any other provision hereof, and any construction of any such provisions hereof by the Trustee in good faith shall be binding upon the Owners of the Bonds. 

Section 10.11 Resignation of Trustee. The Trustee may resign and be discharged of the trusts created by this Indenture by
executing an instrument in writing resigning such trust, and filing the same with an Authorized Officer of the Authority and with the Company, and by giving notice of such resignation by Mail or Electronic Means to all Owners of Bonds. Such
resignation shall take effect immediately upon the appointment of a successor Trustee. 
 So long as no event which is, or after
notice or lapse of time, or both, would become, an Event of Default shall have occurred and be continuing, if the Authority shall have delivered to the Trustee (i) an instrument appointing a successor Trustee, effective as of a date specified
therein and (ii) an instrument of acceptance of such appointment, effective as of such date, by such successor Trustee in accordance with Section 10.16 hereof, the Trustee shall be deemed to have resigned as contemplated in this Section,
the successor Trustee shall be deemed to have been appointed pursuant to subsection (b) of Section 10.13 hereof and such appointment shall be deemed to have been accepted as contemplated in Section 10.16 hereof, all as of such date,
and all other provisions of this Article X shall be applicable to such resignation, appointment and acceptance except to the extent inconsistent with this paragraph. The Authority shall deliver any such instrument of appointment at the direction of
the Company. 
 Section 10.12 Removal of Trustee. The Trustee may be removed at any time by filing with the Trustee
so removed, and with the Authority and the Company, an instrument or instruments in writing, appointing a successor, or an instrument or instruments in writing, consenting to the appointment by the Authority (at the direction of the Company) of a
successor and accompanied by an instrument of appointment by the Authority (at the direction of the Company) of such successor, and in any event executed by Owners of not less than a majority in principal amount of the Bonds then Outstanding, such
filing to be made by any Owner of a Bond or his duly authorized attorney. 
 Section 10.13 Appointment of Successor
Trustee. (a) In case at any time the Trustee shall be removed, or be dissolved, or if its property or affairs shall be taken under the control of any state or federal court or administrative body because of insolvency or bankruptcy, or for
any other reason, then a vacancy shall forthwith and ipso facto exist and a successor may be appointed, and in case at any time the Trustee shall resign or be deemed to have resigned, then a successor may be appointed, by filing with the
Authority and the Company an instrument in writing appointing such successor Trustee executed by Owners of not less than a majority in principal amount of Bonds then Outstanding. Copies of such instrument shall be promptly delivered by the Authority
to the predecessor Trustee, to the Trustee so appointed and the Company. 
 (b) Until a successor Trustee shall be appointed by
the Owners of the Bonds as herein authorized, the Authority, shall appoint a successor Trustee as directed by the Company. After any appointment by the Authority, it shall cause notice of such appointment to be given by Mail or Electronic Means to
all Owners of Bonds. Any new Trustee so appointed by the Authority shall immediately and without further act be superseded by a Trustee appointed by the Owners of the Bonds in the manner above provided. 

(c) No resignation or removal of the Trustee and no appointment of a successor Trustee pursuant to this Article X shall become effective
until the acceptance of appointment by the successor Trustee. 

  
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 Section 10.14 Qualifications of Successor Trustee. Every successor Trustee
(a) shall be a bank, national banking association or trust company duly organized under the laws of the United States or any state or territory thereof authorized by law to perform all the duties imposed upon it by this Indenture and
(b) shall have (or the parent holding company of which shall have) a combined capital stock, surplus and undivided profits of at least $100,000,000 if there can be located, with reasonable effort, such an institution willing and able to accept
the trust on reasonable and customary terms. 
 Section 10.15 Judicial Appointment of Successor Trustee. In case at
any time the Trustee shall resign and no appointment of a successor Trustee shall be made pursuant to the foregoing provisions of this Article X prior to the date specified in the notice of resignation as the date when such resignation is to take
effect, the retiring Trustee may forthwith apply, at the expense of the Company, to a court of competent jurisdiction for the appointment of a successor Trustee. If no appointment of a successor Trustee shall be made pursuant to the foregoing
provisions of this Article X within six (6) months after a vacancy shall have occurred in the office of Trustee, any Owner of a Bond may apply to any court of competent jurisdiction to appoint a successor Trustee. Such court may thereupon,
after such notice, if any, as it may deem proper and prescribe, appoint a successor Trustee. 
 Section 10.16 Acceptance
of Trusts by Successor Trustee. Any successor Trustee appointed hereunder shall execute, acknowledge and deliver to the Authority an instrument accepting such appointment hereunder, and thereupon such successor Trustee, without any further act,
deed or conveyance, shall become duly vested with all the estates, property, rights, powers, trusts, duties and obligations of its predecessor in the trust hereunder, with like effect as if originally named Trustee herein. Upon request of such
Trustee, such predecessor Trustee and the Authority shall execute and deliver an instrument transferring to such successor Trustee all the estates, property, rights, powers and trusts hereunder of such predecessor Trustee and, subject to the
provisions of Section 10.04 hereof, such predecessor Trustee shall pay over to the successor Trustee all moneys and other assets at the time held by it hereunder. 
 Section 10.17 Successor by Merger or Consolidation. Any corporation or association into which any Trustee hereunder may be merged or converted or with which it may be consolidated, or any
corporation or association resulting from any merger or consolidation to which any Trustee hereunder shall be a party or any corporation or association succeeding to or acquiring all or substantially all of the corporate trust business of the
Trustee, shall be the successor Trustee under this Indenture, without the execution or filing of any paper or any further act on the part of the parties hereto, anything in this Indenture to the contrary notwithstanding. 

If, at the time any such successor to the Trustee shall succeed to the trusts created by this Indenture, any of the Bonds shall have been
authenticated but not delivered, such successor Trustee may adopt the certificate of authentication of any predecessor Trustee and deliver such Bonds so authenticated; provided, however, that the right to adopt the certificate of
authentication of any predecessor Trustee shall apply only to its successor or successors by merger, conversion or consolidation. 
 Section 10.18 Standard of Care. Notwithstanding any other provisions of this Article X, the Trustee shall, during the existence of an Event of Default of which the Trustee has actual notice,
exercise such of the rights and powers vested in it by this Indenture and use the same degree of skill and care in their exercise as a prudent person would use and exercise under the circumstances in the conduct of his own affairs. 

Section 10.19 Notice to Owners of Bonds of Event of Default. If an Event of Default occurs of which the Trustee by
Section 10.05 hereof is required to take notice and deemed to have notice, or any other Event of Default occurs of which the Trustee has been specifically notified in accordance with Section 10.05 hereof, and any such Event of Default
shall continue for at least two days after the Trustee acquires actual notice thereof, unless the Trustee shall have theretofore given a notice of acceleration pursuant to Section 9.01 hereof, the Trustee shall give Notice by Mail or Electronic
Means to all Owners of Outstanding Bonds. 
 Section 10.20 Intervention in Litigation of the Authority. In any
judicial proceeding to which the Authority is a party and which in the opinion of the Trustee and its counsel has a substantial bearing on the interests of the Owners of Bonds, the Trustee may intervene on behalf of the Owners of the Bonds and
shall, upon receipt of indemnity satisfactory to it, do so if requested in writing by Owners of at least a majority in principal amount of the Bonds then Outstanding if permitted by the court having jurisdiction in the premises. 

  
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 Section 10.21 Notices of Trustee. The Trustee shall give notice to both the
Authority and the Company whenever it is required hereby to give notice to either and, additionally, shall furnish to the Authority and the Company copies of any Notice by Mail or Electronic Means given by it pursuant to any provision hereof.

 ARTICLE XI 
 EXECUTION OF INSTRUMENTS BY OWNERS OF BONDS AND 
 PROOF OF OWNERSHIP OF BONDS

 Section 11.01 Execution of Instruments; Proof of Ownership. Any request, direction, consent or other instrument
in writing, whether or not required or permitted by this Indenture to be signed or executed by Owners of the Bonds, may be in any number of concurrent instruments of similar tenor and may be signed or executed by Owners of the Bonds or by an agent
appointed by an instrument in writing. Proof of the execution of any such instrument and of the ownership of Bonds shall be sufficient for any purpose of this Indenture and shall be conclusive in favor of the Trustee with regard to any action taken
by it under such instrument if made in the following manner: 
 (a) The fact and date of the execution by any person of any such
instrument may be proved by the certificate of any officer in any jurisdiction who, by the laws thereof, has power to take acknowledgments within such jurisdiction, to the effect that the person signing such instrument acknowledged before him the
execution thereof, or by an affidavit of a witness to such execution. 
 (b) The ownership or former ownership of Bonds shall be
proved by the registration books kept under the provisions of Section 2.08 hereof. 
 Nothing contained in this Article XI
shall be construed as limiting the Trustee to such proof, it being intended that the Trustee may accept any other evidence of matters herein stated which it may deem sufficient. Any request or consent of any Owner of a Bond shall bind every future
Owner of the same Bond or any Bond or Bonds issued in lieu thereof in respect of anything done by the Trustee or the Authority in pursuance of such request or consent. 
 ARTICLE XII 
 MODIFICATION OF THIS INDENTURE AND THE LOAN AGREEMENT 

Section 12.01 Limitations. Neither this Indenture nor the Loan Agreement shall be modified or amended in any respect
subsequent to the original issuance of the Bonds except as provided in and in accordance with and subject to the provisions of this Article XII and Section 7.04 hereof. 
 The Trustee may, but shall not be obligated to, enter into any Supplemental Indenture which affects the Trustee’s own rights, duties or immunities under this Indenture or otherwise. 

Section 12.02 Supplemental Indentures without Owner Consent. The Authority and the Trustee may, from time to time and at any
time, without the consent of or notice to the Owners of the Bonds, enter into Supplemental Indentures as follows: 
 (a) to cure
any formal defect, omission, inconsistency or ambiguity in this Indenture, provided, however, that such cure shall not materially and adversely affect the interests of the Owners of the Bonds; 

(b) to grant to or confer or impose upon the Trustee for the benefit of the Owners of the Bonds any additional rights, remedies, powers,
authority, security, liabilities or duties which may lawfully be granted, conferred or imposed; 
 (c) to add to the covenants
and agreements of, and limitations and restrictions upon, the Authority in this Indenture other covenants, agreements, limitations and restrictions to be observed by the Authority; 

  
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 (d) to confirm, as further assurance, any pledge under, and the subjection to any claim,
lien or pledge created or to be created by, this Indenture, of the Receipts and Revenues of the Authority from the Loan Agreement or of any other moneys, securities or funds; 
 (e) to authorize a different denomination or denominations of the Bonds and to make correlative amendments and modifications to this Indenture regarding exchange ability of Bonds of different
denominations, redemptions of portions of Bonds of particular denominations and similar amendments and modifications of a technical nature; 
 (f) to modify, alter, supplement or amend this Indenture in such manner as shall permit the qualification hereof under the Trust Indenture Act of 1939, as from time to time amended; 

(g) to modify, alter, supplement or amend this Indenture in such manner as shall be necessary, desirable or appropriate in order to
provide for or eliminate the registration and registration of transfer of the Bonds through a book-entry or similar method, whether or not the Bonds are evidenced by certificates; 

(h) to modify, alter, amend or supplement this Indenture in any other respect which is not materially adverse to the Owners and which
does not involve a change described in clause (i), (ii), (iii) or (iv) of Section 12.03(a) hereof; and 
 (i) to
provide any additional procedures, covenants or agreements necessary or desirable to maintain the tax-exempt status of interest on the Bonds. 
 Before the Authority and the Trustee shall enter into any Supplemental Indenture pursuant to this Section 12.02, there shall have been delivered to the Trustee an opinion of Bond Counsel stating that
such Supplemental Indenture is authorized or permitted by this Indenture and the Act, complies with their respective terms, will, upon the execution and delivery thereof, be valid and binding upon the Authority in accordance with its terms and will
not, in and of itself, adversely affect the exclusion from gross income for federal tax purposes of the interest on the Bonds. 

Section 12.03 Supplemental Indentures with Consent of Owners. (a) Except for any Supplemental Indenture entered into
pursuant to Section 12.02 hereof, subject to the terms and provisions contained in this Section 12.03 and Section 12.05 hereof and not otherwise, Owners of not less than a majority in aggregate principal amount of the Bonds then
Outstanding which would be adversely affected thereby shall have the right from time to time to consent to and approve the execution and delivery by the Authority and the Trustee of any Supplemental Indenture deemed necessary or desirable by the
Authority for the purposes of modifying, altering, amending, supplementing or rescinding, in any particular, any of the terms or provisions contained in this Indenture; provided, however, that, unless approved in writing by the Owners of all the
Bonds then Outstanding which would be adversely affected thereby, nothing herein contained shall permit, or be construed as permitting, (i) a change in the times, amounts or currency of payment of the principal of or interest on any Outstanding
Bond, a reduction in the principal amount or redemption price of any Outstanding Bond or a change in the rate of interest thereon, or any impairment of the right of any Owner to institute suit for the payment of any Bond owned by it, or
(ii) the creation of a claim or lien upon, or a pledge of, the Receipts and Revenues of the Authority from the Loan Agreement ranking prior to or on a parity with the claim, lien or pledge created by this Indenture (except as referred to in
Section 10.04 hereof), or (iii) a preference or priority of any Bond or Bonds over any other Bond or Bonds, or (iv) a reduction in the aggregate principal amount of Bonds the consent of the Owners of which is required for any such
Supplemental Indenture or which is required, under Section 12.07 hereof, for any modification, alteration, amendment or supplement to the Loan Agreement. 
 (b) If at any time the Authority shall request the Trustee to enter into any Supplemental Indenture for any of the purposes of this Section 12.03, the Trustee shall cause notice of the proposed
Supplemental Indenture to be given by Mail or Electronic Means to all Owners of Outstanding Bonds. Such notice shall be prepared by the Company and shall briefly set forth the nature of the proposed Supplemental Indenture and shall state that a copy
thereof is on file at the Principal Office of the Trustee for inspection by all Owners of Bonds. 

  
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 (c) Within two (2) years after the date of the first mailing of such notice, the
Authority and the Trustee may enter into such Supplemental Indenture in substantially the form described in such notice only if there shall have first been delivered to the Trustee (i) the required consents, in writing, of Owners of Bonds and
(ii) an opinion of Bond Counsel stating that such Supplemental Indenture is authorized or permitted by this Indenture and the Act, complies with their respective terms and, upon the execution and delivery thereof, will be valid and binding upon
the Authority in accordance with its terms and will not, in and of itself, adversely affect the exclusion from gross income for federal tax purposes of the interest on the Bonds. 

(d) If Owners of not less than the percentage of Bonds required by this Section 12.03 shall have consented to and approved the
execution and delivery thereof as herein provided, no Owner shall have any right to object to the execution and delivery of such Supplemental Indenture, or to object to any of the terms and provisions contained therein or the operation thereof, or
in any manner to question the propriety of the execution and delivery thereof, or to enjoin or restrain the Authority or the Trustee from executing and delivering the same or from taking any action pursuant to the provisions thereof. 

Section 12.04 Effect of Supplemental Indenture. Upon the execution and delivery of any Supplemental Indenture pursuant to the
provisions of this Article XII, this Indenture shall be, and be deemed to be, modified, altered, amended or supplemented in accordance therewith, and the respective rights, duties and obligations under this Indenture of the Authority, the Trustee
and Owners of all Bonds then Outstanding shall thereafter be determined, exercised and enforced under this Indenture subject in all respects to such modifications, alterations, amendments and supplements. 

Section 12.05 Consent of the Company. Anything herein to the contrary notwithstanding, any Supplemental Indenture under this
Article XII which affects any rights, powers, agreements or obligations of the Company under the Loan Agreement, or requires a revision of the Loan Agreement, shall not become effective unless and until the Company shall have consented to such
Supplemental Indenture. 
 Section 12.06 Amendment of Loan Agreement without Consent of Owners. Without the consent
of or notice to the Owners of the Bonds, the Authority may enter into any Supplemental Loan Agreement, and the Trustee may consent thereto, as may be required (a) by the provisions of the Loan Agreement and this Indenture, (b) for the
purpose of curing any formal defect, omission, inconsistency or ambiguity therein, (c) to provide any additional procedures, covenants or agreements necessary or desirable to maintain the tax-exempt status of interest on the Bonds, or
(d) in connection with any other change therein which is not materially adverse to the Owners of the Bonds. A revision of Exhibit A to the Loan Agreement shall not be deemed a Supplemental Loan Agreement for purposes of this Indenture.

 Before the Authority shall enter into, and the Trustee shall consent to, any Supplemental Loan Agreement pursuant to this
Section 12.06, there shall have been delivered to the Trustee an opinion of Bond Counsel stating that such Supplemental Loan Agreement is authorized or permitted by this Indenture and the Act, complies with their respective terms, will, upon
the execution and delivery thereof, be valid and binding upon the Authority and the Company in accordance with its terms and will not, in and of itself, adversely affect the exclusion from gross income for federal tax purposes of interest on the
Bonds. 
 Section 12.07 Amendment of Loan Agreement with Consent of Owners. Except in the case of a Supplemental
Loan Agreement referred to in Section 12.06 hereof, the Authority shall not enter into, and the Trustee shall not consent to, any Supplemental Loan Agreement without the written approval or consent of the Owners of not less than a majority in
aggregate principal amount of the Bonds then Outstanding which would be adversely affected thereby, given and procured as provided in Section 12.03 hereof; provided, however, that, unless approved in writing by the Owners of all Bonds then
Outstanding which would be adversely affected thereby, nothing herein contained shall permit, or be construed as permitting, a change in the obligations of the Company under Section 5.01 of the Loan Agreement. If at any time the Authority or
the Company shall request the consent of the Trustee to any such proposed Supplemental Loan Agreement, the Trustee shall cause notice of such proposed Supplemental Loan Agreement to be given in the same manner as provided by Section 12.03
hereof with respect to Supplemental Indentures. Such notice shall be prepared by the Company and shall briefly set forth the nature of such proposed Supplemental Loan Agreement and shall state that copies of the instrument embodying the same are on
file at the Principal Office of the Trustee for inspection by all Owners of the Bonds. The Authority may enter into, and the Trustee may consent to, any such proposed Supplemental Loan Agreement subject to the same conditions, and with the same
effect, as provided by Section 12.03 hereof with respect to Supplemental Indentures. 

  
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 Section 12.08 Company as Owner. Anything herein to the contrary notwithstanding,
for so long as the Company holds all of Outstanding Bonds, any action that may be taken by the Owners of the Bonds may be taken by the Company. 
 ARTICLE XIII 
 MISCELLANEOUS 

Section 13.01 Successors of the Authority. In the event of the dissolution of the Authority, all the covenants, stipulations,
promises and agreements in this Indenture contained, by or on behalf of, or for the benefit of, the Authority, shall bind or inure to the benefit of the successors of the Authority from time to time and any entity, officer, board, commission, agency
or instrumentality to whom or to which any power or duty of the Authority shall be transferred. 
 Section 13.02 Parties
in Interest. Except as herein otherwise specifically provided, nothing in this Indenture expressed or implied is intended or shall be construed to confer upon any person, firm or corporation other than the Authority, the Company and the Trustee
and their successors and assigns and the Owners of the Bonds any right, remedy or claim under or by reason of this Indenture, this Indenture being intended to be for the sole and exclusive benefit of the Authority, the Company and the Trustee and
their successors and assigns and the Owners of the Bonds. 
 Section 13.03 Severability. In case any one or more of
the provisions of this Indenture or of the Loan Agreement or of the Bonds shall, for any reason, be held to be illegal or invalid, such illegality or invalidity shall not affect any other provisions of this Indenture or of the Loan Agreement or of
such Bonds, and this Indenture and the Loan Agreement and such Bonds shall be construed and enforced as if such illegal or invalid provisions had not been contained herein or therein. 

Section 13.04 No Personal Liability of Authority Officials. No covenant or agreement contained in the Bonds or in this
Indenture shall be deemed to be the covenant or agreement of any director, official, officer, agent, or employee of the Authority in his individual capacity, and neither the members of the Board of Directors of the Authority nor any official
executing the Bonds shall be liable personally on the Bonds or be subject to any personal liability or accountability by reason of the issuance thereof. 
 Section 13.05 Bonds Owned by the Authority or the Company. In determining whether Owners of the requisite aggregate principal amount of the Bonds have concurred in any direction, consent or
waiver under this Indenture, Bonds which are owned by the Authority or the Company or by any person directly or indirectly controlling or controlled by or under direct or indirect common control with the Company (unless the Authority, the Company or
such person owns all Bonds which are then Outstanding, determined without regard to this Section 13.05) 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 Bonds which the Trustee knows are so owned shall be so disregarded. Upon the request of the Trustee, the Company and the Authority shall furnish to the
Trustee a certificate identifying all Bonds, if any, actually known to either of them to be owned or held by or for the account of any of the above-described persons, and the Trustee shall be entitled to rely on such certificate as conclusive
evidence of the facts set forth therein and that all other Bonds are Outstanding for the purposes of such determination. Bonds so owned which have been pledged in good faith may be regarded as Outstanding if the pledgee establishes to the
satisfaction of the Trustee the pledgee’s right so to act with respect to such Bonds and that the pledgee is not the Authority or the Company or any person directly or indirectly controlling or controlled by or under direct or indirect common
control with the Company. 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. 

  
 27 

 Section 13.06 Counterparts. This Indenture may be executed in any number of
counterparts, each of which, when so executed and delivered, shall be an original; but such counterparts shall together constitute but one and the same Indenture. 
 Section 13.07 Governing Law. The laws of the State of Arizona shall govern the construction and enforcement of this Indenture and of all Bonds, except that the laws of the State of New York
shall govern the construction and enforcement of the rights and duties of the Trustee hereunder and the construction of Section 13.09 hereof and the computation of any period of grace provided herein. 

Section 13.08 Notices. Except as otherwise provided in this Indenture, all notices, certificates, requests requisitions or
other communications by the Authority, the Company or the Trustee pursuant to this Indenture shall be in writing and shall be sufficiently given and shall be deemed given when mailed by registered mail, postage prepaid, addressed as follows: If to
the Authority, c/o Russo, Russo & Slania, P.C., 6700 N. Oracle Road, Suite 100, Tucson, Arizona, 85704, Attention: Michael Slania; if to the Company, at 88 East Broadway Boulevard, Tucson, Arizona 85702, Attention: Treasurer; and if to the
Trustee, at 100 Wall Street, Suite 1600, New York, New York 10005, Attention: Corporate Trust Services. Any of the foregoing may, by notice given hereunder to each of the others, designate any further or different addresses to which subsequent
notices, certificates, requests or other communications shall be sent hereunder. Anything herein to the contrary notwithstanding, any notice required to be delivered hereunder may also be delivered by electronic means including, without limitation,
email in PDF format. 
 Section 13.09 Holidays. If the date for making any payment or the last date for performance
of any act or the exercising of any right, as provided in this Indenture, shall be a Saturday, Sunday or a public holiday in the city in which is located the Principal Office of the Trustee, such payment may be made or act performed or right
exercised on the next succeeding business day, with the same force and effect as if done on the nominal date provided in this Indenture, and no interest shall accrue for the period after such nominal date. If the last day of any period of grace, as
provided in this Indenture, shall be a Saturday, Sunday or a public holiday in the city in which is located the Principal Office of the Trustee, the last day of such period of grace shall be deemed to be the next succeeding business day. 

Section 13.10 Statutory Notice Regarding Cancellation of Contracts. As required by the provisions of Section 38-511,
Arizona Revised Statutes, as amended, notice is hereby given that political subdivisions of the State of Arizona or any of their departments or agencies may, within three (3) years of its execution, cancel any contract, without penalty or
further obligation, made by the political subdivisions or any of their departments or agencies on or after September 30, 1988, if any person significantly involved in initiating, negotiating, securing, drafting or creating the contract on
behalf of the political subdivisions or any of their departments or agencies is, at any time while the contract or any extension of the contact is in effect, an employee or agent of any other party to the contract in any capacity or a consultant to
any other party of the contract with respect to the subject matter of the contract. 
 The Trustee covenants and agrees not to
employ as an employee, agent or, with respect to the subject matter of this Indenture, a consultant, any person actually known by the Trustee to be significantly involved in initiating, negotiating, securing, drafting or creating such Indenture on
behalf of the Authority within three (3) years from the execution hereof, unless a waiver is provided by the Authority. 

  
 28 

 IN WITNESS WHEREOF, The Industrial Development Authority of the County of Pima has caused
this Indenture to be executed by its President and U.S. Bank Trust National Association has caused this Indenture to be executed on its behalf by its Vice President, all as of the day and year first above written. 

 

			
	THE INDUSTRIAL DEVELOPMENT AUTHORITY OF THE COUNTY OF PIMA
		
	By:	 	 /s/ Frank Y. Valenzuela

		 	Name: Frank Y. Valenzuela
		 	Title: President
	
	U.S. BANK TRUST NATIONAL ASSOCIATION
		
	By:	 	 /s/ Patrick Crowley

		 	Name: Patrick Crowley
		 	Title: Vice President

 Signature Page to Indenture of Trust (2012 Series A) 

 EXHIBIT A 
 (FORM OF BOND) 
 No. 
 The Industrial Development Authority 
 of the County of Pima

 Industrial Development Revenue Bond, 
 2012 Series A 
 (Tucson Electric Power Company Project) 

 

					
	Interest Rate (per annum):	  		  	
	Maturity Date:	  		  	Dated:
	Cusip:	  		  	
	Registered Owner:	  		  	
	Principal Amount:	  		  	Dollars

 The Industrial Development Authority of the County of Pima, an Arizona nonprofit corporation designated
by law as a political subdivision of the State of Arizona (the “Authority”), for value received, hereby promises to pay (but only out of the Receipts and Revenues of the Authority from the Loan Agreement, as hereinafter defined, and other
moneys pledged therefor) to the Registered Owner identified above or registered assigns, on the Maturity Date set forth above, upon the presentation and surrender hereof, the Principal Amount set forth above and to pay (but only out of the Receipts
and Revenues of the Authority from the Loan Agreement and other moneys pledged therefor), interest on said Principal Amount until payment of said Principal Amount has been made or duly provided for, from the date hereof, at the Interest Rate set
forth above, semi-annually on the first day of June and December in each year, commencing December 1, 2012. Interest will be calculated on the basis of a 360-day year of twelve 30-day months. All capitalized terms used and not otherwise defined
herein shall have the meanings assigned to such terms in the hereinafter defined Indenture. 
 The principal of this Bond is
payable at the principal office of U.S. Bank Trust National Association, as trustee. Interest on this Bond is payable by check drawn upon the Trustee and mailed to the Registered Owner of this Bond as of the close of business on the Record Date at
the registered address of such Registered Owner; notwithstanding the foregoing, upon request to the Trustee by a Registered Owner of not less than $1,000,000 in aggregate principal amount of Bonds, interest on such Bonds and, after presentation and
surrender of such Bonds, the principal thereof shall be paid to such Registered Owner by wire transfer to the account maintained within the continental United States specified by such Registered Owner or, if such Registered Owner maintains an
account with the entity acting as Trustee, by deposit into such account. Payment of the principal of and interest on, this Bond shall be in any coin or currency of the United States of America as, at the respective times of payment, shall be legal
tender for the payment of public and private debts. 
 This Bond is one of the duly authorized The Industrial Development
Authority of the County of Pima Industrial Development Revenue Bonds, 2012 Series A (Tucson Electric Power Company Project) (the “Bonds”) of the Authority, aggregating Sixteen Million Four Hundred Sixty Five Thousand Dollars
($16,465,000) in principal amount, issued under and pursuant to the Constitution and laws of the State of Arizona, particularly Title 35, Chapter 5, Arizona Revised Statutes, as amended (the “Act”), and the Indenture of Trust,
dated as of June 1, 2012 (the “Indenture”), between the Authority and U.S. Bank Trust National Association, as trustee (together with any successor thereto, the “Trustee”). Pursuant to the Loan Agreement, dated as of
June 1, 2012 (the “Loan Agreement”), between the Authority and Tucson Electric Power Company, a corporation organized and existing under the laws of the State of Arizona (the “Company”), the proceeds of the Bonds will be
loaned to the Company and will be applied to refinance a portion of the costs of the acquisition, construction, improvement and equipping of the Facilities . 
 Neither Pima County, Arizona nor the State of Arizona shall in any event be liable for the payment of the principal of or premium, if any, or interest on the Bonds, and neither the Bonds, nor the premium,
if any, or the interest thereon, shall be construed to constitute an indebtedness of Pima County, Arizona or the State of Arizona within the meaning of any constitutional or statutory provisions whatsoever. The Bonds and the premium, if any, and the
interest thereon are limited obligations of the Authority payable solely from the Receipts and Revenues of the Authority from the Loan Agreement and other moneys pledged therefor under the Indenture. 

Signature Page to Indenture of Trust (2012 Series A) 

  
 A-1

 The Bonds are equally and ratably secured, to the extent provided in the Indenture, by the
pledge thereunder of the “Receipts and Revenues of the Authority from the Loan Agreement”, which term is used herein as defined in the Indenture and which as therein defined means all moneys paid or payable to the Trustee for the account
of the Authority by the Company in respect of the loan payments, including all receipts of the Trustee which, under the provisions of the Indenture, reduce the amounts of such payments. The Authority has also pledged and assigned to the Trustee as
security for the Bonds all other rights and interests of the Authority under the Loan Agreement (other than its rights to indemnification and its administrative expenses and certain other rights). 

The transfer of this Bond shall be registered upon the registration books kept at the principal office of the Trustee, at the written
request of the Registered Owner hereof or his attorney duly authorized in writing, upon surrender of this Bond at said office, together with a written instrument of transfer satisfactory to the Trustee duly executed by the Registered Owner or his
duly authorized attorney. 
 In the manner and with the effect provided in the Indenture, each of the Bonds may be redeemed
prior to maturity, as follows: 
 (a) The Bonds shall be subject to redemption by the Authority, at the direction of the
Company, on any date on or after June 1, 2022 in whole at any time or in part from time to time, at 100% of the principal amount thereof plus accrued interest, if any, to the redemption date. 

(b) The Bonds shall be subject to redemption by the Authority, at the direction of the Company, in whole at any time at 100% of the
principal amount thereof plus accrued interest, if any, to the redemption date, if: 
 (i) the Company shall have determined
that the continued operation of the Facilities is impracticable, uneconomical or undesirable for any reason; 
 (ii) all or
substantially all of the Facilities shall have been condemned or taken by eminent domain; or 
 (iii) the operation of the
Facilities shall have been enjoined or shall have otherwise been prohibited by, or shall conflict with, any order, decree, rule or regulation of any court or of any federal, state or local regulatory body, administrative agency or other governmental
body. 
 (c) The Bonds shall be subject to mandatory redemption by the Authority, at the principal amount thereof plus accrued
interest to the redemption date, on the 180th day (or such earlier date as may be designated by the Company) after a final determination by a court of competent jurisdiction or an administrative agency, to the effect that, as a result of a failure
by the Company to perform or observe any covenant, agreement or representation contained in the Loan Agreement, the interest payable on the Bonds is included for federal income tax purposes in the gross income of the owners thereof, other than any
owner of a Bond who is a “substantial user” of the Facilities or a “related person” within the meaning of Section 103(b)(13) of the 1954 Code. No determination by any court or administrative agency shall be considered final
for the purposes of this paragraph (c) unless the Company shall have been given timely notice of the proceeding which resulted in such determination and an opportunity to participate in such proceeding, either directly or through an owner of a
Bond, and until the conclusion of any appellate review sought by any party to such proceeding or the expiration of the time for seeking such review. The Bonds shall be redeemed either in whole or in part in such principal amount that, in the opinion
of Bond Counsel, the interest payable on the Bonds, including the Bonds remaining outstanding after such redemption, would not be included in the gross income of any owner thereof, other than an owner of a Bond who is a “substantial user”
of the Facilities or a “related person” within the meaning of Section 103(b)(13) of the 1954 Code. 

  
 A-2

 If less than all of the Bonds at the time outstanding are to be called for redemption, the
particular Bonds or portions of Bonds to be redeemed shall be selected by the Trustee, in such manner as the Trustee in its discretion may deem proper, in the principal amounts designated to the Trustee by the Company or otherwise as required by the
Indenture. 
 In the event any of the Bonds are called for redemption, the Trustee shall give notice, in the name of the
Authority, of the redemption of such Bonds. Such notice shall be given by electronic means or by mailing a copy of the redemption notice by first-class mail at least thirty (30) days prior to the date fixed for redemption to the Registered
Owners of the Bonds to be redeemed at the addresses shown on the registration books; provided, however, that failure duly to give such notice, or any defect therein, shall not affect the validity of any proceedings for the redemption of the Bonds as
to which there shall be no such failure or defect. 
 With respect to any notice of redemption of Bonds in accordance with the
redemption provisions lettered (a) or (b) above, unless, upon the giving of such notice, such Bonds shall be deemed to have been paid within the meaning of the Indenture, such notice shall state that such redemption, shall be conditional
upon the receipt, by the Trustee on or prior to the opening of business on the date fixed for such redemption of moneys sufficient to pay the principal of and interest on such Bonds to be redeemed, and that if such moneys shall not have been so
received said notice shall be of no force and effect and the Authority shall not be required to redeem such Bonds. In the event that such notice of redemption contains such a condition and such moneys are not so received, the redemption shall not be
made and the Trustee shall within a reasonable time thereafter give notice, in the manner in which the notice of redemption was given, that such moneys were not so received. Any notice of such redemption may also contain such other conditions as the
Company shall specify and may be rescinded by the Company in accordance with the provisions of the Indenture. 
 If a notice of
redemption shall be unconditional, or if the conditions of a conditional notice of redemption shall have been satisfied, then upon presentation and surrender of Bonds so called for redemption at the place or places of payment, such Bonds shall be
redeemed. 
 Any Bonds and portions of Bonds which have been duly selected for redemption shall cease to bear interest on the
specified redemption date provided that moneys sufficient to pay the principal of and interest on such Bonds shall be on deposit with the Trustee on the date fixed for redemption so that such Bonds will be deemed to be paid in accordance with the
Indenture and such Bonds shall thereafter cease to be entitled to any lien, benefit or security under the Indenture. 
 The
Registered Owner of this Bond shall have no right to enforce the provisions of the Indenture, or to institute action to enforce the covenants therein, or to take any action with respect to any default under the Indenture, or to institute, appear in
or defend any suit or other proceeding with respect thereto, except as provided in the Indenture. 
 With certain exceptions as
provided therein, the Indenture and the Loan Agreement may be modified or amended only with the consent of the Registered Owners of a majority in aggregate principal amount of all Bonds outstanding under the Indenture which would be adversely
affected thereby. 
 Reference is hereby made to the Indenture and the Loan Agreement, copies of which are on file with the
Trustee, for the provisions, among others, with respect to the nature and extent of the rights, duties and obligations of the Authority, the Company, the Trustee and the Registered Owners of the Bonds. The Registered Owner of this Bond, by the
acceptance hereof, is deemed to have agreed and consented to the terms and provisions of the Indenture and the Loan Agreement. 

Among other things, as provided in the Indenture and subject to certain limitations therein set forth, this Bond or any portion of the
principal amount hereof will be deemed to have been paid within the meaning and with the effect expressed in the Indenture, and the entire indebtedness of the Authority in respect thereof shall be satisfied and discharged, if there has been
irrevocably deposited with the Trustee, in trust, money in an amount which will be sufficient and/or Government Obligations, the principal of and interest on which, when due, without regard to any reinvestment thereof, will provide moneys which,
together with moneys deposited with or held by the Trustee, will be sufficient, to pay when due the principal of and interest on this Bond or such portion of the principal amount hereof when due. 

  
 A-3

 Among other things, the Loan Agreement contains terms, provisions and conditions relating to
the consolidation or merger of the Company with or into, and the sale, transfer or other disposition of assets to, another Person, to the assumption by such other Person, in certain circumstances, of all of the obligations of the Company under the
Loan Agreement and to the release and discharge of the Company, in certain circumstances, from such obligations. 
 The
Authority and the Trustee may deem and treat the person in whose name this Bond is registered as the absolute owner hereof for all purposes, whether or not this Bond is overdue, and neither the Authority nor the Trustee shall be affected by any
notice to the contrary; provided that if the Company is the sole Owner of this Bond, the Authority and the Trustee may deem and treat the Company as the absolute owner for all purposes. 

It is hereby certified, recited and declared that all acts, conditions and things required by the Constitution and laws of the State of
Arizona to exist, to have happened and to have been performed, precedent to and in the execution and delivery of the Indenture and the issuance of this Bond, do exist, have happened and have been performed in regular and due form as required by law.

 No covenant or agreement contained in this Bond or the Indenture shall be deemed to be a covenant or agreement of any
official, officer, agent or employee of the Authority in his individual capacity, and neither the members of the Board of Directors of the Authority, nor any official executing this Bond, shall be liable personally on this Bond or be subject to any
personal liability or accountability by reason of the issuance or sale of this Bond. 
 This Bond shall not be entitled to any
right or benefit under the Indenture, or be valid or become obligatory for any purpose, until this Bond shall have been authenticated by the execution by the Trustee of the certificate of authentication inscribed hereon. 

  
 A-4

 IN WITNESS WHEREOF, The Industrial Development Authority of the County of Pima has caused
this Bond to be executed in its name and on its behalf by the manual or facsimile signature of its President or Vice President and attested with the manual or facsimile signature of its Secretary or Assistant Secretary set forth below. 

 

			
	THE INDUSTRIAL DEVELOPMENT AUTHORITY OF THE COUNTY OF PIMA
		
	By	 	  

		 	Frank Y. Valenzuela, President

  

	
	ATTEST:
	
	  

	Cecilia Cruz, Secretary

  
 A-5

 EXHIBIT B 
 (FORM FOR ORDINARY REGISTRATION OF TRANSFER) 
 COMPLETE AND SIGN THIS FORM FOR
ORDINARY 
 REGISTRATION OF TRANSFER 
 FOR VALUE RECEIVED, the undersigned hereby sell(s), assign(s) and transfer(s) unto 
 Please Insert
Social Security Or Other Identifying Number of Assignee 
  

					
	  
	  		  	
			
	  
	  		  	

 Please print or typewrite name and address including postal zip code of assignee 

 

					
	  
	  		  	

 this bond and all rights thereunder, hereby irrevocably constituting and appointing
                    attorney to register such transfer on the registration books in the designated office of the Trustee, with full power of
substitution in the premises. 
  

			
	
Dated:                       
                 
	  	  

		  	NOTE: The signature on this assignment must correspond with the name as written on the face of this Bond in every particular, without alteration, enlargement or any change
whatsoever.

 Signature Page to Indenture of Trust (2012 Series A) 

  
 B-1

 EXHIBIT C 
 (FORM OF TRUSTEE’S CERTIFICATE OF AUTHENTICATION) 
 CERTIFICATE OF
AUTHENTICATION 
 This is to certify that this Bond is one of the Bonds described in the within-mentioned Indenture.

  

			
	U.S. BANK TRUST NATIONAL ASSOCIATION,as Trustee
		
	By	 	  

		 	Authorized Signatory

 Date of
Authentication:                     

  
 C-1

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