Document:

20-F

Exhibit 4.33  

Nortel Confidential 

Nortel Networks
Agreement No. 011449
Nortel Networks Amendment No. 011449-7 

AMENDMENT #7 

(File # 011449-7;
Nortel CRB # 637) 

To 

OEM PURCHASE, SALE AND
SUPPORT AGREEMENT (“Agreement”) 

BETWEEN SELLER
CORPORATION AND NORTEL NETWORKS LIMITED 

This Amendment No. 7 to the OEM
Purchase, Sale and Support Agreement by and between Nortel Networks Limited, a Canada
corporation with offices located at 8200 Dixie Road, Suite 100, Brampton, Ontario, Canada
L6T 5P6 (“Nortel Networks”) and AudioCodes Ltd., an Israeli
corporation with offices located at 4 HaHoresh Street, 56470 Yehud, Israel (Seller), will
be effective as of December 15, 2006. 

WHEREAS, Nortel Networks and Seller
entered into an OEM Purchase, Sale and Support Agreement (“Agreement”) with an
Effective Date of April 28, 2003; and 

WHEREAS, effective as of June 1, 2003
Nortel Networks and Seller amended the Agreement for the purposes of revising the terms
and conditions of the Agreement pertaining to the sale and purchase of “Norstar
Gateway Products” (“Amendment 1”); and 

WHEREAS, effective as of January 1,
2005 Nortel Networks and Seller amended the Agreement for the purposes of Seller
obligating itself to pay over a cash incentive to promote and sell AudioCodes’
Mediant 5000 Trunk Gateway Product (i.e., the Nortel Media Gateway 3500) (“Gateway
3500”) (“Amendment 2”); and 

WHEREAS, effective as of February 15,
2005 Nortel Networks and Seller amended the Agreement for the purposes of adding an OEM
Interface License to the Agreement to address interoperability issues with regard to
certain Products described therein (“Amendment 3”); and 

WHEREAS, effective as of January 1,
2005 Nortel Networks and Seller amended the Agreement for the purposes of updating M5K
pricing and amending various contract terms and conditions (“Amendment 4”); and 

WHEREAS, effective as of January 1,
2005 Nortel Networks and Seller amended the Agreement for the purposes of updating Support
provisions (“Amendment 5”); and 

WHEREAS, effective as of April 1,
2005 Nortel Networks and Seller amended the Agreement for the purposes of Seller’s
obtaining the use of Nortel Network’s code-signing certificate and private key in
relation to a Nortel Network’s customer’s use of the Mediant Products
(“Amendment 6”); and 

WHEREAS, Nortel Networks and Seller
wish to further amend the Agreement; 

NOW, THEREFORE, in consideration of
the premises and the promises set forth herein, the parties agree to amend the Agreement
as follows: 

1/2

	1.  	In
Section 9.4 of the Agreement, delete the last sentence (i.e., "Nortel Networks will pay
Seller within 45 days      of Nortel Networks' receipt of invoices.") and replace it with
the following new sentence:

	 	
“Nortel
Networks will pay Seller within 60 days of Nortel Networks’ receipt of invoices.” 

IN WITNESS WHEREOF, the parties have
caused this Amendment No. 7 to the Agreement to be signed by their duly authorized
representatives. 

	NORTEL NETWORKS LIMITED

By: 
——————————————

Print Name: 
——————————————

Title: 
——————————————

Date: 
——————————————
	AUDIOCODES LTD.,

By: 
——————————————

Print Name: 
——————————————

Title: 
——————————————

Date: 
——————————————

2/220-F

Exhibit 4.34  

Endorsement and Transfer of Rights
Agreement by and between Nortel Networks (Sales and Marketing) Ltd Israel
(“Lessee”) and AudioCodes Ltd. (“AudioCodes”) dated
March 29, 2007 (“Endorsement Agreement”), pursuant to which Lessee
transferred to AudioCodes its rights and obligations under a lease agreement with Airport
Campus Ltd (“Lessor”) regarding a building in “Airport City”
(Modiin municipal area as further detailed in the Agreement) together with two sublease
agreements as further detailed hereinafter: 

Commencement date of the transfer of
rights and obligations: No later than December 31, 2007, according to Lessee’s 14-day
prior notice to AudioCodes (the “Commencement Date”). 

On the Commencement Date, $725,000 USD (+V.A.T) shall be paid to
AudioCodes. 

Rights and Obligations
transferred: 

	 	— 	Lease
Agreement with Airport Campus Ltd. dated November 14, 2000 ("Lease Agreement") 

	 	        Premises:
Lease of a building with an area of approximately 17,784 square meters and an additional
parking basement of approximately 6,913 square meters, together with 300 open air parking
spaces. This area also includes the premises currently subleased by AudioCodes from
Lessee under the sublease agreement between such parties. After the Commencement Date,
AudioCodes will lease these premises directly from Lessor under the conditions of the
Lease Agreement.  

	 	        Lease
period:  From the Commencement Date until January 2013 with an option to extend
lease for two additional periods of five years each.  

	 	        Rent:
For the main premises, $9.98 per square meter per calendar month, for the parking
basement area, $2.92 per square meter per calendar month. All of the above prices exclude
all taxes and are converted to New Israeli Shekels (NIS) as of signing of the agreement
($1 US= 4.87 NIS) and linked thereafter to changes in the Israeli Consumer Price Index (“ICPI”)
from 9/2000  

	 	        Restrictions
on use: AudioCodes has the right to sublease up to 33% of the premises to a third
party without obtaining Lessor’s approval. AudioCodes can also transfer all of its
rights under the Lease Agreement to a third party subject to Lessor’s approval as
further detailed in the Lease Agreement.  

	 	        Security
Deposit: AudioCodes is required to provide a guarantee for 13,151,000 NIS linked to
changes in ICPI from September 2000.  

	 	—	Sublease
Agreement, dated January 28, 2004, by and between Lessee and Bezek – The Israeli
Communications Company Ltd. (“Bezek”) according to which Lessee
subleases to Bezek a room consisting of 23 square meters. Rent paid by Bezek is
approximately 1500 NIS per month, linked to the ICPI from December 2003. The term of the
lease expires January 2008, after which Bezek has an option to extend the lease for an
additional five-year period. 

	 	—	Sublease
Agreement between Lessee and Cargo Airlines Ltd. (“CAL”) dated December
8, 2002, pursuant to which Lessee subleases to CAL an area of 994 square meters and 45
parking spaces. Rent paid by CAL is approximately 65,000 NIS per month (including rent
for parking spaces) linked to ICPI from October 2002. The term of the lease expires
January 2008, after which CAL has an option to extend the lease for an additional
five-year period.Form of Officer's Certificate - Nevada Power Co.

 Exhibit 4.1 
 NEVADA POWER COMPANY 
 OFFICER’S CERTIFICATE 
 June 28, 2007 
 I, the undersigned officer of
Nevada Power Company (the “Company”), do hereby certify that I am an Authorized Officer of the Company as such term is defined in the Indenture (as defined herein). I am delivering this certificate pursuant to the authority granted in the
Board Resolutions of the Company dated May 8, 2007, and Sections 1.04, 2.01, 3.01, 4.01(a) and 4.03(b)(i) of the General and Refunding Mortgage Indenture dated as of May 1, 2001, as heretofore amended and supplemented to the date hereof
(as heretofore amended and supplemented, the “Indenture”), between the Company and The Bank of New York, as Trustee (the “Trustee”). Section 1(u)(ix) of this Officer’s Certificate sets forth definitions of capitalized
terms used herein. Terms used herein and not otherwise defined herein shall have the meanings assigned to them in the Indenture. Based upon the foregoing, I hereby certify on behalf of the Company as follows: 
 1. The terms and conditions of the Securities described in this Officer’s Certificate are as follows (the lettered subdivisions set forth in this
Section 1 corresponding to the lettered subdivisions of Section 3.01 of the Indenture): 
 (a) The Securities of the eighteenth
series to be issued under the Indenture shall be designated “6.750% General and Refunding Mortgage Notes, Series R, due 2037(the “Series R Notes”). 
 (b) There shall be no limit upon the aggregate principal amount of the Series R Notes that may be authenticated and delivered under the Indenture. The Series R Notes shall be initially authenticated and delivered in
the aggregate principal amount of $350,000,000. 
 (c) Interest on the Series R Notes shall be payable to the Persons in whose names such
Securities are registered at the close of business on the Regular Record Date for such interest, except as otherwise expressly provided in the form of such Securities attached hereto as Exhibit A. 
 (d) The Series R Notes shall mature and the principal thereof shall be due and payable together with all accrued and unpaid interest thereon on
July 1, 2037. 
 (e) The Series R Notes shall bear interest as provided in the form of such Securities attached hereto as Exhibit
A. 
 (f) The Corporate Trust Office of The Bank of New York in New York, New York shall be the place at which (i) the principal,
interest and premium on the Series R Notes shall be payable, (ii) registration of transfer of the Series R Notes may be effected, (iii) exchanges of the Series R Notes may be effected and (iv) notices and demands to or upon 

 
the Company in respect of the Series R Notes and the Indenture may be served; and The Bank of New York shall be the Security Registrar for the Series R
Notes; provided, however, that the Company reserves the right to change, by one or more Officer’s Certificates, any such place or the Security Registrar; and provided, further, that the Company reserves the right to
designate, by one or more Officer’s Certificates, its principal office in Las Vegas, Nevada as any such place or itself or any of its Subsidiaries as the Security Registrar; provided, however, that there shall be only a single
Security Registrar for the Series R Notes. 
 (g) Optional Redemption. 
 (i) Optional Redemption. The Company may redeem the Series R Notes at any time, either in whole or in part at a redemption price
equal to the greater of (1) 100% of the principal amount of the Series R Notes being redeemed and (2) the sum of the present values of the remaining scheduled payments of principal and interest on the Series R Notes being redeemed
(excluding the portion of any such interest accrued to the date of redemption) discounted (for purposes of determining present value) to the redemption date on a semi-annual basis (assuming a 360-day year consisting of twelve 30-day months) at the
Treasury Rate (as defined below) plus 30 basis points, plus, in each case, accrued interest thereon to the date of redemption. 
 “Comparable Treasury Issue” means the United States Treasury security selected by an Independent Investment Banker as having a maturity comparable to the remaining term of the Series R Notes that would be utilized, at the time of
selection and in accordance with customary financial practice, in pricing new issues of corporate debt securities of comparable maturity to the remaining term of the Series R Notes. 
 “Comparable Treasury Price” means, with respect to any redemption date, (1) the average of the bid and asked prices for the
Comparable Treasury Issue (expressed in each case as a percentage of its principal amount) on the third business day preceding such redemption date, as set forth in the daily statistical release (or any successor release) published by the Federal
Reserve Bank of New York and designated “Composite 3:30 p.m. Quotations for U.S. Government Securities” or (2) if such release (or any successor release) is not published or does not contain such prices on such third business day, the
Reference Treasury Dealer Quotation for such redemption date. 
 “Independent Investment Banker” means one of the
Reference Treasury Dealers appointed by the Company. 
 “Reference Treasury Dealer” means a primary U.S. Government
Securities Dealer selected by the Company. 
 “Reference Treasury Dealer Quotation” means, with respect to the
Reference Treasury Dealer and any redemption date, the average, as determined by the 

  

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Independent Investment Banker, of the bid and asked prices for the Comparable Treasury Issue (expressed in each case as a percentage of its principal amount)
quoted in writing to the Independent Investment Banker by such Reference Treasury Dealer at or before 5:00 p.m., New York City time, on the third business day preceding such redemption date. 
 “Treasury Rate” means, with respect to any redemption date, the rate per year equal to the semi-annual equivalent yield to
maturity of the Comparable Treasury Issue, assuming a price for the Comparable Treasury Issue (expressed as a percentage of its principal amount) equal to the Comparable Treasury Price for such redemption date. 
 (ii) Notice of Redemption. Notices of redemption shall be mailed by first class mail at least 30 but not more than 60 days before
the Redemption Date to each Holder of Series R Notes to be redeemed at its registered address, except that redemption notices may be mailed more than 60 days prior to a Redemption Date if the notice is issued in connection with a defeasance of the
Series R Notes or a satisfaction and discharge of the Series R Notes under the Indenture. Notices of redemption may not be conditional. In lieu of the Redemption Price any Notice of Redemption of the Series R Notes shall state the manner of
calculating the Redemption Price. 
 (iii) Selection of Series R Notes to be Redeemed. In accordance with
Section 5.03 of the Indenture, the following method is provided for the selection of Series R Notes to be redeemed and these procedures shall be followed by the Security Registrar in the event of a redemption of the Series R Notes pursuant to
the provisions of this Officer’s Certificate. If less than all of the Series R Notes are to be redeemed at any time, the Security Registrar shall select Series R Notes for redemption as follows: 
  

	 	(A)	if the Series R Notes are listed on any national securities exchange, in compliance with the requirements of the principal national securities exchange on which the Series R Notes
are listed; or 

  

	 	(B)	if the Series R Notes are not listed on any national securities exchange, on a pro rata basis, by lot or by such method as the Trustee deems fair and appropriate.

 No Series R Notes of $2,000 principal amount or less can be redeemed in part. 
 (h) Mandatory Redemption/Redemption at Option of Holders/Offers to Purchase. 
 (i) Mandatory Redemption. 
 (A) Except as provided in Section 1(h)(i)(B) below or Section 1(h)(ii) below, the Company is not required to make mandatory redemption or sinking fund payments with respect to the Series R Notes. 

 

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 (B) Upon the occurrence of the events described below in clauses (1) or (2) of
this Section 1(h)(i)(B), the Company shall be required to redeem the Series R Notes immediately, at a Redemption Price equal to 100% of the aggregate principal amount of the Series R Notes plus accrued and unpaid interest on the Series R Notes
to the date of redemption, without further action or notice on the part of the Trustee or the Holders of the Series R Notes: 
  

	 	(1)	the Company or any of its Subsidiaries that is a Significant Subsidiary or any group of Subsidiaries that, taken together, would constitute a Significant Subsidiary pursuant to or
within the meaning of Bankruptcy Law: 

  

	 	(I)	commences a voluntary case, 

  

	 	(II)	consents to the entry of an order for relief against it in an involuntary case, 

  

	 	(III)	consents to the appointment of a custodian of it or for all or substantially all of its property, 

  

	 	(IV)	makes a general assignment for the benefit of its creditors, or 

  

	 	(V)	admits in writing of its inability to pay its debts generally as they become due; or 

  

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

  

	 	(I)	is for relief against the Company or any of its Subsidiaries that is a Significant Subsidiary or any group of Subsidiaries that, taken as a whole, would constitute a Significant
Subsidiary in an involuntary case; 

  

	 	(II)	appoints a custodian of the Company or any of its Subsidiaries that is a Significant Subsidiary or any group of Subsidiaries that, taken as a whole, would constitute a Significant
Subsidiary or for all or substantially all of the property of the Company or any of its Subsidiaries that is a Significant Subsidiary or any group of Subsidiaries that, taken as a whole, would constitute a Significant Subsidiary; or

  

	 	(III)	orders the liquidation of the Company or any of its Subsidiaries that is a Significant Subsidiary or any group of Restricted Subsidiaries that, taken as a whole, would constitute a
Significant Subsidiary; 

 and the order or decree remains unstayed and in effect for 60 consecutive days.

  

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 (ii) Redemption at the Option of the Holders. 
  

	 	(A)	Upon the occurrence of any of the following events (each a “Triggering Event”): 

  

	 	(1)	failure for 30 days to pay when due interest on the Series R Notes; 

  

	 	(2)	failure to pay when due the principal of, or premium, if any, on the Series R Notes; 

  

	 	(3)	failure by the Company or any of its Restricted Subsidiaries to comply with the provisions described in Sections 1(u)(ii) of this Officer’s Certificate (under the heading
“Certain Covenants and Definitions—Merger, Consolidation or Sale of Assets”); 

  

	 	(4)	failure by the Company or any of its Restricted Subsidiaries for 30 days after notice to comply with the provisions described in Section 1(h)(iii) of this Officer’s
Certificate (under the heading “Offer to Purchase Upon Change of Control”); 

  

	 	(5)	failure by the Company or any of its Restricted Subsidiaries for 60 days after notice to comply with any of the other agreements in this Officer’s Certificate or the Series R
Notes; 

  

	 	(6)	default under any mortgage, indenture or instrument under which there may be issued or by which there may be secured or evidenced any Indebtedness for money borrowed by the Company
or any of its Restricted Subsidiaries (or the payment of which is guaranteed by the Company or any of its Restricted Subsidiaries) whether such Indebtedness or guarantee now exists, or is created after the original issue date of the Series R Notes,
if that default: 

  

	 	(I)	is caused by a failure to pay principal of, or interest or premium, if any, on such Indebtedness prior to the expiration of the grace period provided in such Indebtedness on the
date of such default (a “Payment Default”); or 

  

	 	(II)	results in the acceleration of such Indebtedness prior to its express maturity, 

 and, in each case, the principal amount of any such Indebtedness, together with the principal amount of any other such Indebtedness under which there has been a Payment Default or the maturity of which has been so
accelerated, aggregates $15.0 million or more; or 
  

	 	(7)	failure by the Company or any of its Subsidiaries to pay final judgments aggregating in excess of $15.0 million, which judgments are not paid, discharged or stayed for a period of
60 days, 

  

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 the Holders of Series R Notes of at least 25% in principal amount of the Series R Notes then Outstanding
may deliver a notice to the Company and the Trustee requiring the Company to redeem the Series R Notes immediately at a Redemption Price equal to 100% of the aggregate principal amount of the Series R Notes plus accrued and unpaid interest on the
Series R Notes to the Redemption Date. 
 (B) The Holders of a majority in aggregate principal amount of the Series R Notes
then outstanding by notice to the Company and the Trustee may on behalf of the Holders of all of the Series R Notes waive any existing Triggering Event and its consequences except a continuing Triggering Event related to the payment of interest on,
or the principal of, the Series R Notes. 
 (C) In the case of any Triggering Event by reason of any willful action or
inaction taken or not taken by or on behalf of the Company with the intention of avoiding payment of the premium that the Company would have had to pay if the Company then had elected to redeem the Series R Notes pursuant to the provisions of
Section 1(g)(i), an equivalent premium equal to the premium payable under Section 1(g)(i) shall also become and be immediately due and payable to the extent permitted by law upon the redemption of the Series R Notes at the option of the
Holders thereof. 
 (D) Upon becoming aware of any Triggering Event, the Company shall deliver to the Trustee a statement
specifying such Triggering Event. 
 (iii) Offer to Purchase Upon Change of Control. 
 (A) Upon the occurrence of a Change of Control, each Holder of Series R Notes shall have the right to require the Company to repurchase
all or any part (equal to $2,000 or an integral multiple of $1,000 in excess thereof) of that Holder’s Series R Notes pursuant to the offer described below (the “Change of Control Offer”) on the terms set forth in this Officer’s
Certificate. In the Change of Control Offer, the Company shall offer an amount in cash (the “Change of Control Payment”) equal to 101% of the aggregate principal amount of Series R Notes repurchased plus accrued and unpaid interest on the
Series R Notes repurchased to the Change of Control Payment Date (as defined below). 
 (B) Within ten days following any
Change of Control, the Company shall mail a notice to each Holder of Series R Notes stating: 
  

	 	(1)	the description of the transaction or transactions that constitute the Change of Control, that the Change of Control Offer is being made pursuant to this Section 1(h)(iii), and
that all Series R Notes validly tendered and not withdrawn shall be accepted for payment; 

  

	 	(2)	the purchase price and the purchase date, which shall be no earlier than 30 days and no later than 60 days from the date such notice is mailed (the “Change of Control Payment
Date”); 

  

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	 	(3)	that any Series R Note not tendered or accepted for payment shall continue to accrue interest; 

  

	 	(4)	that, unless the Company defaults in the payment of the Change of Control Payment, all Series R Notes accepted for payment pursuant to the Change of Control Offer shall cease to
accrue interest after the Change of Control Payment Date; 

  

	 	(5)	that Holders of Series R Notes electing to have any Series R Notes purchased pursuant to a Change of Control Offer shall be required to surrender the Series R Notes properly
endorsed, with the form entitled “Option of Holder to Elect Purchase” on the reverse of the Series R Notes properly completed, together with other customary documents as the Company may reasonably request, to the Paying Agent at the
address specified in the notice prior to the close of business on the third Business Day preceding the Change of Control Payment Date; 

  

	 	(6)	that Holders of Series R Notes shall be entitled to withdraw their election if the Paying Agent receives, not later than the close of business on the second Business Day preceding
the Change of Control Payment Date, a telegram, facsimile transmission or letter setting forth the name of the Holder, the principal amount of Series R Notes delivered for purchase, and a statement that such Holder of Series R Notes is withdrawing
its election to have the Series R Notes purchased; and 

  

	 	(7)	that Holders of Series R Notes whose Series R Notes are being purchased only in part shall be issued new Series R Notes equal in principal amount to the unpurchased portion of the
Series R Notes surrendered, which unpurchased portion must be equal to $2,000 in principal amount or an integral multiple of $1,000 in excess thereof. 

 (C) If any of the Series R Notes subject to a Change of Control Offer are in the form of a Global Note, then the Company shall modify such
notice to the extent necessary to accord with the Applicable Procedures of the Depositary applicable to offers to purchase. 
 (D) On the Change of Control Payment Date, the Company shall, to the extent lawful, (1) accept for payment all Series R Notes or portions thereof properly tendered pursuant to the Change of Control Offer, (2) deposit with the
Paying Agent in immediately available funds an amount equal to the Change of Control Payment in respect of all Series R Notes or portions thereof so tendered and (3) deliver or cause to be delivered to the Trustee the Series R Notes so accepted
together with an Officer’s Certificate stating the aggregate principal amount of Series R Notes or portions thereof being purchased by the Company. The Paying Agent shall promptly mail to each Holder of Series R Notes so tendered the Change of
Control Payment for such Series R Notes, and the Trustee shall promptly authenticate and make available for delivery to each Holder of Series R Notes a new Series R Note equal in principal amount to any 

  

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unpurchased portion of the Series R Notes surrendered, if any; provided that each such new Series R Note shall be in a principal amount of $2,000 or
an integral multiple of $1,000 in excess thereof. Any Series R Note not so accepted shall be promptly mailed or delivered by the Company to the Holder thereof. The Company shall publicly announce the results of the Change of Control Offer on or as
soon as practicable after the Change of Control Payment Date. 
 (E) The Change of Control provisions described above that
require the Company to make a Change of Control Offer following a Change of Control shall be applicable whether or not any other provisions of this Officer’s Certificate are applicable. 
 (F) The Company shall not be required to make a Change of Control Offer upon a Change of Control if a third party makes the Change of
Control Offer in the manner, at the times and otherwise in compliance with the requirements set forth herein applicable to a Change of Control Offer made by the Company and purchases all Series R Notes validly tendered and not withdrawn under such
Change of Control Offer. 
 (iv) Offers to Purchase – General. 
 (A) If the Change of Control Payment Date is on or after a Regular Record Date and on or before the related Interest Payment Date, any
accrued and unpaid interest shall be paid to the Person in whose name a Series R Note is registered at the close of business on such Regular Record Date, and no additional interest shall be payable to Holders of Series R Notes who tender Series R
Notes pursuant to the Change of Control Offer. 
 (B) The Company shall comply with the requirements of Rule 14e-1 under the
Exchange Act and any other securities laws and regulations thereunder to the extent those laws and regulations are applicable in connection with a Change of Control Offer. To the extent that the provisions of any securities laws or regulations
conflict with the Change of Control Offer provisions of this Officer’s Certificate, the Company shall comply with the applicable securities laws and regulations and shall not be deemed to have breached its obligations under the Change of
Control Offer provisions of this Officer’s Certificate by virtue of such conflict. 
 (i) The Series R Notes are issuable only in
denominations of $2,000 and integral multiples of $1,000 in excess thereof. 
 (j) Not applicable. 
 (k) Not applicable. 
 (l) Not applicable.

 (m) See subsection (e) above. 
 (n) Not applicable. 
  

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 (o) Not applicable. 
 (p) Not applicable. 
 (q) Book-entry; Delivery and Form. 
 (i) Form and Dating. 
 The Series R Notes and the Trustee’s certificate of authentication shall be substantially in the form of Exhibit A hereto. The Series R Notes may have notations, legends or endorsements required by law,
stock exchange rule or usage. Each Series R Note shall be dated the date of its authentication. The Series R Notes shall be in denominations of $2,000 and integral multiples of $1,000 in excess thereof. 
 The terms and provisions contained in the Series R Notes shall constitute, and are hereby expressly made, a part of this Officer’s
Certificate, and the Company, by its execution and delivery of this Officer’s Certificate, expressly agrees to such terms and provisions and to be bound thereby. However, to the extent any provision of any Series R Note conflicts with the
express provisions of this Officer’s Certificate or the Indenture, the provisions of this Officer’s Certificate or the Indenture, as applicable, shall govern and be controlling. 
 Series R Notes issued in global form shall be substantially in the form of Exhibit A attached hereto. Series R Notes issued in
definitive form shall be substantially in the form of Exhibit A attached hereto. Each Global Note shall represent such aggregate principal amount of the outstanding Series R Notes as shall be specified therein and each shall provide that it
shall represent the aggregate principal amount of outstanding Series R Notes from time to time endorsed thereon and that the aggregate principal amount of outstanding Series R Notes represented thereby may from time to time be reduced or increased,
as appropriate, to reflect exchanges and redemptions. Any endorsement of a Global Note to reflect the amount of any increase or decrease in the aggregate principal amount of outstanding Series R Notes represented thereby shall be made by the
Trustee, the Depositary or the Note Custodian, at the direction of the Trustee, in accordance with instructions given by the Holder thereof as required by Section 1(q)(iv) of this Officer’s Certificate. 
 The provisions of the “Operating Procedures of the Euroclear System” and “Terms and Conditions Governing Use of
Euroclear” and the “General Terms and Conditions of Clearstream Bank” and “Customer Handbook” of Clearstream shall be applicable to transfers of beneficial interests in the Global Notes that are held by members of, or
Participants, in DTC through Euroclear or Clearstream. 
 (ii) Authentication. 
 The Trustee or an Authenticating Agent shall authenticate by delivery and execution of a Trustee’s Certificate of Authentication in
the form set forth in Section 2.02 of the Indenture (A) the Series R Notes for original issue on the Issue Date in the 

  

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aggregate principal amount of $350,000,000 (the “Original Notes”) and (B) additional Series R Notes for original issue from time to time after
the Issue Date in such principal amounts as may be set forth in a Company Order (such additional Series R Notes, together with the Original Notes, the “Initial Notes”) in each case, upon a Company Order, which Company Order shall specify
(x) the amount of Series R Notes to be authenticated and the date of original issue thereof and (y) the amount of Series R Notes to be issued in global form or definitive form. The aggregate principal amount of Series R Notes outstanding
at any time may not exceed $350,000,000 plus such additional principal amounts as may be issued and authenticated pursuant to clause (B) of this paragraph. 
 (iii) Security Registrar, Paying Agent and Depositary. 
 The Company initially appoints the Trustee to act as the Security Registrar and Paying Agent for the Series R Notes. Upon the occurrence
of an event set forth under Sections 1(h)(i)(B)(1) or 1(h)(i)(B)(2) herein or an Event of Default set forth in Sections 10.01(d) or 10.01(e) of the Indenture, the Trustee shall serve as Paying Agent for the Series R Notes. Pursuant to
Section 6.02 of the Indenture, the Company hereby designates the Corporate Trust Office of the Trustee as its office or agency in the City and State of New York where payment of the Series R Notes shall be made, where the registration of
transfer or exchange of the Series R Notes may be effected and where notices and demands to or upon the Company in respect of the Series R Notes and the Indenture may be served. The Company may also from time to time designate one or more other
offices or agencies with respect to the Series R Notes and may from time to time rescind any of these designations in accordance with the terms provided in Section 6.02 of the Indenture. 
 The Company initially appoints The Depository Trust Company (“DTC”) to act as Depositary with respect to the Global Notes. The
Trustee has been appointed by DTC to act as Note Custodian with respect to the Global Notes. 
 (iv) Transfer and
Exchange. 
 (A) Transfer and Exchange of Global Notes. A Global Note may not be transferred as a whole except by
the Depositary to a nominee of the Depositary, by a nominee of the Depositary to the Depositary or to another nominee of the Depositary, or by the Depositary or any such nominee to a successor Depositary or a nominee of such successor Depositary.
All Global Notes shall be exchanged by the Company for Definitive Notes if: 
  

	 	(1)	the Company delivers to the Trustee notice from the Depositary that it is unwilling or unable to continue to act as Depositary for the Global Notes or that it is no longer a
clearing agency registered under the Exchange Act and, in either case, a successor Depositary is not appointed by the Company within 90 days after the date of such notice from the Depositary; or 

  

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	 	(2)	the Company in its sole discretion notifies the Trustee in writing that it elects to cause issuance of the Series R Notes in certificated form. 

 Upon the occurrence of either of the preceding events in (1) or(2) above, Definitive Notes shall be issued in such names as the Depositary shall
instruct the Trustee. Global Notes also may be exchanged or replaced, in whole or in part, as provided in Sections 3.06 and 3.09 of the Indenture. Every Series R Note authenticated and delivered in exchange for, or in lieu of, a Global Note or any
portion thereof, pursuant to Sections 3.06 and 3.09 of the Indenture, shall be authenticated and delivered in the form of, and shall be, a Global Note. A Global Note may not be exchanged for another Series R Note other than as provided in this
Section 1(q)(iv)(A), however, beneficial interests in a Global Note may be transferred and exchanged as provided in Section 1(q)(iv)(B) of this Officer’s Certificate. 
 (B) Transfer and Exchange of Beneficial Interests in the Global Notes. The transfer and exchange of beneficial interests in the
Global Notes shall be effected through the Depositary, in accordance the Applicable Procedures. 
 (C) Transfer and
Exchange of Definitive Notes for Definitive Notes. Upon request by a Holder of Definitive Notes and such Holder’s compliance with the provisions of this Section 1(q)(iv)(C), the Security Registrar shall register the transfer or
exchange of Definitive Notes. Prior to such registration of transfer or exchange, the requesting Holder shall present or surrender to the Security Registrar the Definitive Notes duly endorsed or accompanied by a written instruction of transfer in
form satisfactory to the Security Registrar duly executed by such Holder or by his attorney, duly authorized in writing. In addition, the requesting Holder shall provide any additional certifications, documents and information, as applicable,
pursuant to the provisions of this Section 1(q)(iv)(C). 
 (1) Definitive Notes to Definitive Notes. A Holder of
Definitive Notes may transfer such Series R Notes to a Person who takes delivery thereof in the form of a Definitive Note. Upon receipt of a request for such a transfer, the Security Registrar shall register the Definitive Notes pursuant to the
instructions from the Holder thereof. 
 (D) Legends. The following legends shall appear on the face of all Global
Notes and Definitive Notes issued under this Indenture unless specifically stated otherwise in the applicable provisions of this Officer’s Certificate. 
 (1) Global Note Legend. Each Global Note shall bear a legend in substantially the following form: 
 “THIS GLOBAL NOTE IS HELD BY THE DEPOSITARY (AS DEFINED IN THE OFFICER’S CERTIFICATE UNDER THE INDENTURE GOVERNING THIS NOTE) OR ITS NOMINEE IN
CUSTODY FOR THE BENEFIT OF THE BENEFICIAL OWNERS HEREOF, AND IS NOT TRANSFERABLE TO ANY PERSON UNDER ANY CIRCUMSTANCES EXCEPT THAT (I) THE TRUSTEE MAY MAKE SUCH 

  

 11 

 
NOTATIONS HEREON AS MAY BE REQUIRED PURSUANT TO ARTICLE III OF THE INDENTURE, (II) THIS GLOBAL NOTE MAY BE EXCHANGED IN WHOLE BUT NOT IN PART PURSUANT TO
SECTION 1(q)(iv)(A) OF THE OFFICER’S CERTIFICATE UNDER THE INDENTURE, (III) THIS GLOBAL NOTE MAY BE DELIVERED TO THE TRUSTEE FOR CANCELLATION PURSUANT TO SECTION 3.09 OF THE INDENTURE AND (IV) THIS GLOBAL NOTE MAY BE TRANSFERRED TO A SUCCESSOR
DEPOSITARY WITH THE PRIOR WRITTEN CONSENT OF THE COMPANY OR ANY SUCCESSOR THERETO.” 
 Additionally, for so long as DTC
is the Depositary with respect to any Global Note, each such Global Note shall also bear a legend in substantially the following form: 
 “UNLESS THIS NOTE IS PRESENTED BY AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITARY, TO THE COMPANY OR ANY SUCCESSOR THERETO OR ITS AGENT FOR REGISTRATION OF TRANSFER, EXCHANGE, OR PAYMENT, AND ANY CERTIFICATE ISSUED IS REGISTERED IN THE
NAME OF CEDE & CO. OR IN SUCH OTHER NAME AS IS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITARY (AND ANY PAYMENT IS MADE TO CEDE & CO. OR TO SUCH OTHER ENTITY AS IS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF THE
DEPOSITARY), ANY TRANSFER, PLEDGE, OR OTHER USE HEREOF FOR VALUE OR OTHERWISE BY OR TO ANY PERSON IS WRONGFUL INASMUCH AS THE REGISTERED OWNER HEREOF, CEDE & CO., HAS AN INTEREST HEREIN.” 
 (E) Cancellation and/or Adjustment of Global Notes. At such time as all beneficial interests in a particular Global Note
have been exchanged for Definitive Notes or a particular Global Note has been redeemed, repurchased or canceled in whole and not in part, each such Global Note shall be returned to or retained and canceled by the Trustee in accordance with
Section 3.09 of the Indenture. At any time prior to such cancellation, if any beneficial interest in a Global Note is exchanged for or transferred to a Person who shall take delivery thereof in the form of a beneficial interest in another
Global Note or for Definitive Notes, the principal amount of Series R Notes represented by such Global Note shall be reduced accordingly and an endorsement shall be made on such Global Note, by the Trustee, the Note Custodian or the Depositary at
the direction of the Trustee, to reflect such reduction; and if the beneficial interest is being exchanged for or transferred to a Person who shall take delivery thereof in the form of a beneficial interest in another Global Note, such other Global
Note shall be increased accordingly and an endorsement shall be made on such Global Note, by the Trustee, the Note Custodian or by the Depositary at the direction of the Trustee, to reflect such increase. 
  

 12 

 (F) General Provisions Relating to Transfers and Exchanges. 
 (1) To permit registrations of transfers and exchanges, subject to Section 1(q)(iv) of this Officer’s Certificate, the Company
shall execute and, upon the Company’s order, the Trustee or an Authenticating Agent shall authenticate Global Notes and Definitive Notes at the Security Registrar’s request. 
 (2) All certifications, certificates and Opinions of Counsel required to be submitted to the Security Registrar pursuant to this
Section 1(q)(iv) to effect a transfer or exchange may be submitted by facsimile. 
 (v) Outstanding Series R
Notes. 
 Notwithstanding the definition of “Outstanding” in Section 1.01 of the Indenture, Series R Notes
that the Company, a Subsidiary of the Company or an Affiliate of the Company offers to purchase or acquires pursuant to an offer, exchange offer, tender offer or otherwise shall not be deemed to be owned by the Company, such Subsidiary or such
Affiliate until legal title to such Series R Notes passes to the Company, such Subsidiary or such Affiliate, as the case may be. 
 (r) Not
applicable. 
 (s) Not applicable. 
 (t) For purposes of the Series R Notes, “Business Day” shall mean any day, other than Saturday or Sunday, on which commercial banks are open for business, including dealings in deposits in U.S. dollars, in New York. 
 (u) Certain Covenants and Definitions. 
 (i) Series R Liens. 
 The Company shall not, and shall not permit any of its
Restricted Subsidiaries to, directly or indirectly, create, incur, assume or otherwise cause or suffer to exist or become effective any Series R Lien of any kind securing Indebtedness, Attributable Debt or trade payables on any of their property or
assets, now owned or hereafter acquired, except Series R Permitted Liens. 
 (ii) Merger, Consolidation or Sale of
Assets. 
 (A) The Company shall not, directly or indirectly: (1) consolidate or merge with or into another Person
(whether or not the Company is the surviving corporation); or (2) sell, assign, transfer, convey or otherwise dispose of all or substantially all of the properties or assets of the Company and its Restricted Subsidiaries taken as a whole, in
one or more related transactions, to another Person; unless: 
  

	 	(1)	 either: (a) the Company is the surviving corporation; or (b) the Person formed by or surviving any such consolidation or merger (if other than the 

  

 13 

	 	 
Company) or to which such sale, assignment, transfer, conveyance or other disposition has been made is a corporation organized or existing under the laws of
the United States, any state of the United States or the District of Columbia; 

  

	 	(2)	(a) the Person formed by or surviving any such consolidation or merger (if other than the Company) or the Person to which such sale, assignment, transfer, conveyance or other
disposition has been made assumes all the obligations of the Company under the Series R Notes and the Indenture reasonably satisfactory to the Trustee; and (b) such Person executes and delivers to the Trustee a supplemental indenture that
contains a grant, conveyance, transfer and mortgage by such Person confirming the lien of the Indenture on the property subject to such lien and subjecting to such lien all property thereafter acquired by such Person that shall constitute an
improvement, extension or addition to the property subject to the lien of the Indenture or renewal, replacement or substitution of or for any part thereof and, at the election of such Person, subjecting to the lien of the Indenture such other
property then owned or thereafter acquired by such Person as such Person shall specify; 

  

	 	(3)	immediately after such transaction no Default or Event of Default exists; and 

  

	 	(4)	the Company, or the Person formed by or surviving any such consolidation or merger (if other than the Company), or to which such sale, assignment, transfer, conveyance or other
disposition has been made, shall have delivered to the Trustee an Officer’s Certificate and an Opinion of Counsel, each stating that such transaction and any supplemental indenture entered into in connection therewith complies with all of the
terms of this Section 1(u)(ii) and that all conditions precedent provided for in this Section 1(u)(ii) relating to such transaction or series of transactions have been complied with. 

 (B) In addition, the Company may not, directly or indirectly, lease all or substantially all of its properties or assets, in one or more
related transactions, to any other Person. Clause (4) under Section 1(u)(ii)(A) shall not apply to a sale, assignment, transfer, conveyance or other disposition of assets between or among the Company and any of its Restricted Subsidiaries.

 (C) In addition, the Company shall not effect any consolidation, merger, sale, assignment, transfer, conveyance or other
disposition as is contemplated in this Section 1(u)(ii), unless the Company also complies with Sections 13.01 and 13.02 of the Indenture and the Person formed by or surviving any such consolidation or merger (if other than the Company) or to
which such sale, assignment, transfer, conveyance or other disposition has been made, shall be deemed a Successor Corporation under the Indenture. 
  

 14 

 (iii) Future Subsidiary Guarantees. 
 (A) The Company shall not permit any Restricted Subsidiary to guarantee the payment of any Indebtedness of the Company unless: 

 

	 	(1)	such Restricted Subsidiary simultaneously executes and delivers to the Trustee a Subsidiary Guarantee of such Restricted Subsidiary except that with respect to a Guarantee of
Indebtedness of the Company if such Indebtedness is by its express terms subordinated in right of payment to the Series R Notes, any such Guarantee of such Restricted Subsidiary with respect to such Indebtedness shall be subordinated in right of
payment to such Restricted Subsidiary’s Subsidiary Guarantee with respect to the Series R Notes substantially to the same extent as such Indebtedness is subordinated to the Series R Notes; 

  

	 	(2)	such Restricted Subsidiary waives and shall not in any manner whatsoever claim or take the benefit or advantage of, any rights or reimbursement, indemnity or subrogation or any
other rights against the Company or any other Restricted Subsidiary as a result of any payment by such Restricted Subsidiary under its Subsidiary Guarantee of the Series R Notes; and 

  

	 	(3)	such Restricted Subsidiary shall deliver to the Trustee an Opinion of Counsel to the effect that (a) such Subsidiary Guarantee has been duly executed and authorized and
(b) such Subsidiary Guarantee constitutes a valid, binding and enforceable obligation of such Restricted Subsidiary, except insofar as enforcement thereof may be limited by bankruptcy, insolvency or similar laws (including, without limitation,
all laws relating to fraudulent transfers) and except insofar as enforcement thereof is subject to general principles of equity; provided that this Section 1(u)(iii)(A) shall not be applicable to any Guarantee of any Restricted
Subsidiary that (x) existed at the time such Person became a Restricted Subsidiary of the Company and (y) was not incurred in connection with, or in contemplation of, such Person becoming a Restricted Subsidiary of the Company.

 (B) Notwithstanding the foregoing and the other provisions of this Officer’s Certificate, in the event a
Subsidiary Guarantor is sold or disposed of (whether by merger, consolidation, the sale of its Capital Stock or the sale of all or substantially all of its assets (other than by lease) and whether or not the Subsidiary Guarantor is the surviving
corporation in such transaction) to a Person which is not the Company or a Restricted Subsidiary of the Company (other than a Receivables Entity), such Subsidiary Guarantor shall be released from its obligations under its Subsidiary Guarantee if:

  

	 	(1)	the sale or other disposition is in compliance with the applicable provisions of this Officer’s Certificate; and 

  

	 	(2)	the Subsidiary Guarantor is also released or discharged from its obligations under the Guarantee which resulted in the creation of such Subsidiary Guarantee, except by or as a
result of payment under such Guarantee. 

  

 15 

 (iv) Sale and Leaseback Transactions. 
 (A) The Company shall not, and shall not permit any of its Restricted Subsidiaries to, enter into any sale and leaseback transaction;
provided that the Company or any Restricted Subsidiary may enter into a sale and leaseback transaction if the gross cash proceeds of that sale and leaseback transaction are at least equal to the fair market value, as determined in good faith
by the Board of Directors and set forth in an Officer’s Certificate delivered to the Trustee, of the property that is the subject of that sale and leaseback transaction. 
 (v) Payments for Consent. 
 The Company shall not, and shall not permit any of its Subsidiaries to, directly or indirectly, pay or cause to be paid any consideration to or for the benefit of any Holder of Series R Notes for or as an inducement
to any consent, waiver or amendment of any of the terms or provisions of this Officer’s Certificate or the Series R Notes unless such consideration is offered to be paid and is paid to all Holders of the Series R Notes that consent, waive or
agree to amend in the time frame set forth in the solicitation documents relating to such consent, waiver or agreement. 
 (vi) Covenant Defeasance. 
 (A) Option to Effect Covenant Defeasance. The Company may, at the option
of the Board of Directors evidenced by a resolution set forth in an Officers’ Certificate, at any time, elect to have Section 1(u)(vi)(B) hereof be applied to all outstanding Series R Notes upon compliance with the conditions set forth
below in Section 1(u)(vi)(C) hereof. 
 (B) Exercise of Covenant Defeasance. Upon the Company’s exercise
under Section 1(u)(vi)(A) hereof of the option applicable to this Section 1(u)(vi)(B), the Company shall, subject to the satisfaction of the conditions set forth in Section 1(u)(vi)(C) hereof, be released from each of its obligations
under the covenants contained in Section 1(h)(iii), Section 1(u)(i), Section 1(u)(iii), Section 1(u)(iv), Section 1(u)(v) hereof (under the headings: “Mandatory Redemption/Redemption at Option of Holders/Offers to
Purchase—Offer to Purchase Upon Change of Control,” “Certain Covenants and Definitions—Liens,” “Certain Covenants and Definitions—Future Subsidiary Guarantees,” “Certain Covenants and
Definitions—Sale and Leaseback Transactions,” and “Certain Covenants and Definitions—Payment for Consents”) hereof with respect to the Outstanding Series R Notes on and after the date the conditions set forth in
Section 1(u)(vi)(C) hereof are satisfied (hereinafter, “Covenant Defeasance”), and the Series R Notes shall thereafter be deemed not Outstanding for the purposes of any direction, waiver, consent or declaration or act of Holders of
Securities, including but not limited to, Holders of Series R Notes (and the consequences of any thereof) in connection with such covenants, but will continue to be deemed Outstanding for all other purposes hereunder. For this purpose, Covenant
Defeasance means that, with respect to 

  

 16 

 
the Outstanding Series R Notes, the Company may omit to comply with and will have no liability in respect of any term, condition or limitation set forth in
any such covenant, whether directly or indirectly, by reason of any reference elsewhere herein to any such covenant or by reason of any reference in any such covenant to any other provision herein or in any other document and such omission to comply
will not constitute a Triggering Event under Section 1(h)(ii) hereof or a Default or an Event of Default under Section 10.01 of the Indenture, but, except as specified above, the remainder of the Indenture, this Officer’s Certificate
and such Series R Notes will be unaffected thereby. In addition, upon the Company’s exercise under Section 1(u)(vi)(A) hereof of the option applicable to Section 1(u)(vi)(B) hereof, subject to the satisfaction of the conditions set
forth in Section 1(u)(vi)(C) hereof, Sections 1(h)(ii)(A)(3) through 1(h)(ii)(A)(7) hereof will not constitute Triggering Events. 
 (C) Conditions to Covenant Defeasance. In order to exercise Covenant Defeasance under this Section 1(u)(vi): 
  

	 	(1)	the Company must irrevocably deposit with the Trustee or any Paying Agent (other than the Company), in trust for the benefit of the Holders of the Series R Notes:

  

	 	(a)	money (including Funded Cash not otherwise applied pursuant to the Indenture) in an amount which will be sufficient, or 

  

	 	(b)	Eligible Obligations which do not contain provisions permitting the redemption or other prepayment thereof at the option of the issuer thereof, the principal of and the interest on
which when due, without any regard to reinvestment thereof, will provide monies which, together with the money, if any, deposited with or held by the Trustee or such Paying Agent, will be sufficient, or 

  

	 	(c)	a combination of (a) and (b) which will be sufficient, to pay when due the principal of and premium, if any, and interest, if any, due and to become due on the Series R
Notes or portions thereof provided, that the Company shall have delivered to the Trustee and such Paying Agent: (I) a Company Order stating that the money and Eligible Obligations deposited in accordance with this Section 1(u)(vi)(C) shall
be held in trust, as provided in Section 9.03 of the Indenture; and (II) if Eligible Obligations shall have been deposited, an Opinion of Counsel to the effect that such obligations constitute Eligible Obligations and do not contain provisions
permitting the redemption or other prepayment thereof at the option of the issuer thereof, and an opinion of an Independent public Accountant of nationally recognized standing, selected by the Company, to the effect that the other requirements set
forth in Section 1(u)(vi)(C)(1)(b) above have been satisfied; 

  

 17 

	 	(2)	the Company shall have delivered to the Trustee an Opinion of Counsel confirming that the Holders of the Outstanding Series R Notes will not recognize income, gain or loss for
federal income tax purposes as a result of such Covenant Defeasance and will be subject to federal income tax on the same amounts, in the same manner and at the same times as would have been the case if such Covenant Defeasance had not occurred;

  

	 	(3)	no Triggering Event shall have occurred and be continuing on the date of such deposit (other than a Triggering Event arising from the breach of a covenant under this Officer’s
Certificate resulting from the borrowing of funds to be applied to such deposit); 

  

	 	(4)	such Covenant Defeasance will not result in a breach or violation of, or constitute a default under any material agreement or instrument (other than this Officer’s Certificate)
to which the Company or any of its Subsidiaries is a party or by which the Company or any of its Subsidiaries is bound; 

  

	 	(5)	the Company must deliver to the Trustee an Officer’s Certificate stating that the deposit was not made by the Company with the intent of preferring the Holders of Series R
Notes over the other creditors of the Company with the intent of defeating, hindering, delaying or defrauding creditors of the Company or others; and 

  

	 	(6)	the Company must deliver to the Trustee an Officer’s Certificate and an Opinion of Counsel, each stating that all conditions precedent relating to the Covenant Defeasance have
been complied with. 

 (vii) Additional Conditions to Section 9.01 of Indenture. 
 Notwithstanding the provisions of Section 9.01 of the Indenture, no Series R Note shall be deemed to have been paid pursuant to such provisions
unless the Company shall have delivered to the Trustee either: (a) an Opinion of Counsel in the United States reasonably acceptable to the Trustee confirming that (i) the Company has received from, or there has been published by, the Internal
Revenue Service a ruling or (ii) since the date of this Officer’s Certificate, there has been a change in the applicable federal income tax law, in either case to the effect that, and based thereon such Opinion of Counsel shall confirm that,
the Holders of the Outstanding Series R Notes will not recognize income, gain or loss for federal income tax purposes as a result of such satisfaction and discharge and will be subject to federal income tax on the same amounts, in the same manner
and at the same times as would have been the case if such satisfaction and discharge had not occurred; or (b) (i) an instrument wherein the Company, notwithstanding the satisfaction and discharge of the Company’s Indebtedness in respect of
the Series R Notes, shall assume the obligation (which shall be absolute and unconditional) to irrevocably deposit with the Trustee such additional sums of money, if any, or additional Eligible Obligations, if any, or any combination thereof, at
such time or times, as shall be necessary, together with the money and/or Eligible Obligations theretofore so deposited, to pay when due the principal of and premium, if any, and interest due and to become due 

  

 18 

 
on such Series R Notes or portions thereof; provided, however, that such instrument may state that the Company’s obligation to make
additional deposits as aforesaid shall be subject to the delivery to the Company by the Trustee of a notice asserting the deficiency accompanied by an opinion of an Independent public Accountant of nationally recognized standing showing the
calculation thereof; and (ii) an Opinion of Counsel of tax counsel in the United States reasonably acceptable to the Trustee to the effect that the Holders of the Outstanding Series R Notes will not recognize income, gain or loss for federal
income tax purposes as a result of such satisfaction and discharge and will be subject to federal income tax on the same amounts, in the same manner and at the same times as would have been the case if such satisfaction and discharge had not
occurred. 
 (viii) Modifications Requiring Consent. 
 In addition to the provisions of Section 14.02 of the Indenture, no supplemental indenture shall alter or waive any of the provisions
with respect to the redemption of the Series R Notes set forth in Section 1(g) hereof without the consent of each Holder of Series R Notes affected thereby. 
 (ix) Certain Definitions. 
 Set forth below are certain defined terms used in this Officer’s Certificate. Reference is made to the Indenture for the definitions of any other capitalized terms used herein for which no definition is provided
herein. 
 “Affiliate” of any specified Person means any other Person directly or indirectly controlling or
controlled by or under direct or indirect common control with such specified Person. For purposes of this definition, “control,” as used with respect to any Person, means the possession, directly or indirectly, of the power to direct or
cause the direction of the management or policies of such Person, whether through the ownership of voting securities, by agreement or otherwise; provided that beneficial ownership of 10% or more of the Voting Stock of a Person shall be deemed
to be control. For purposes of this definition, the terms “controlling,” “controlled by” and “under common control with” have correlative meanings. 
 “Applicable Procedures” means, with respect to any transfer or exchange of or for beneficial interests in any Global
Note, the rules and procedures of the Depositary, Euroclear and Clearstream that apply to such transfer or exchange. 
 “Attributable Debt” in respect of a sale and leaseback transaction means, at the time of determination, the present value of the obligation of the lessee for net rental payments during the remaining term of the lease
included in such sale and leaseback transaction including any period for which such lease has been extended or may, at the option of the lessor, be extended. Such present value shall be calculated using a discount rate equal to the rate of interest
implicit in such transaction, determined in accordance with GAAP. 
  

 19 

 “Bankruptcy Law” means Title 11, U.S. Code or any similar federal or
state law for the relief of debtors. 
 “Beneficial Owner” has the meaning assigned to such term in Rule
13d-3 and Rule 13d-5 under the Exchange Act, except that in calculating the beneficial ownership of any particular “person” (as that term is used in Section 13(d)(3) of the Exchange Act), such “person” shall be deemed to
have beneficial ownership of all securities that such “person” has the right to acquire by conversion or exercise of other securities, whether such right is currently exercisable or is exercisable only upon the occurrence of a subsequent
condition. The terms “Beneficially Owns” and “Beneficially Owned” have a corresponding meaning. 
 “Board of Directors” means: 
  

	 	(1)	with respect to a corporation, the board of directors of the corporation or any committee of such board of directors duly authorized to act for the corporation;

  

	 	(2)	with respect to a partnership, the board of directors of the general partner of the partnership; and 

  

	 	(3)	with respect to any other Person, the board or committee of such Person serving a similar function. 

 “Capital Lease Obligation” means, at the time any determination is to be made, the amount of the liability in respect of
a capital lease that would at that time be required to be capitalized on a balance sheet in accordance with GAAP. 
 “Capital Stock” means: 
  

	 	(1)	in the case of a corporation, corporate stock; 

  

	 	(2)	in the case of an association or business entity, any and all shares, interests, participations, rights or other equivalents (however designated) of corporate stock;

  

	 	(3)	in the case of a partnership or limited liability company, partnership or membership interests (whether general or limited); and 

  

	 	(4)	any other interest or participation that confers on a Person the right to receive a share of the profits and losses of, or distributions of assets of, the issuing Person.

 “Change of Control” means the occurrence of any of the following: 
  

	 	(1)	 the direct or indirect sale, transfer, conveyance or other disposition (other than by way of merger or consolidation), in one or a series of related transactions,
of all or substantially all of the properties or assets of the 

  

 20 

	 	 
Company and its Restricted Subsidiaries taken as a whole to any “person” (as that term is used in Section 13(d)(3) of the Exchange Act,
including any “group” with the meaning of the Exchange Act); 

  

	 	(2)	the adoption of a plan relating to the liquidation or dissolution of the Company; 

  

	 	(3)	the consummation of any transaction (including, without limitation, any merger or consolidation) the result of which is that any “person” (as defined above) becomes the
Beneficial Owner, directly or indirectly, of more than 30% of the Voting Stock of the Company or Sierra Pacific Resources, measured by voting power rather than number of shares; or 

  

	 	(4)	the first day on which a majority of the members of the Board of Directors of the Company or the Board of Directors of Sierra Pacific Resources are not Continuing Directors.

 “Change of Control Offer” has the meaning assigned to it in Section 1(h)(iii)(A) of
this Officer’s Certificate. 
 “Change of Control Payment” has the meaning assigned to it in
Section 1(h)(iii)(A) of this Officer’s Certificate. 
 “Change of Control Payment Date” has the
meaning assigned to it in Section 1(h)(iii)(B)(2) of this Officer’s Certificate. 
 “Clearstream”
means Clearstream Banking, Societe Anonyme Luxembourg. 
 “Continuing Directors” means, as of any date of
determination, any member of the Board of Directors of the Company who: 
  

	 	(1)	was a member of the Board of Directors of the Company on the original issue date of the Series R Notes; or 

  

	 	(2)	was nominated for election or elected to the Board of Directors of the Company with the approval of a majority of the Continuing Directors who were members of the Board of Directors
at the time of such nomination or election. 

 “Default” means any event that is, or with the
passage of time or the giving of notice or both would be, an Event of Default as defined in the Indenture. 
 “Definitive Note” means a certificated Series R Note registered in the name of the Holder thereof and issued in accordance with Section 1(q)(iv) of this Officer’s Certificate, in the form of Exhibit A
hereto except that such Series R Note shall not bear the Global Note Legend. 
  

 21 

 “Depositary” means, with respect to the Series R Notes issuable or
issued in whole or in part in global form, the Person specified in Section 1(q)(iii) of this Officer’s Certificate as the Depositary with respect to the Series R Notes, and any and all successors thereto appointed as depositary hereunder
and having become such pursuant to the applicable provision of this Officer’s Certificate or the Indenture. 
 “DTC” has the meaning assigned to it in Section 1(q)(iii) of this Officer’s Certificate. 
 “Equity Interests” means Capital Stock and all warrants, options or other rights to acquire Capital Stock (but excluding any debt security that is convertible into, or exchangeable for, Capital Stock). 
 “Euroclear” means Euroclear Bank S.A./N.V. 
 “Event of Default” means an Event of Default as defined in the Indenture. 
 “GAAP” means generally accepted accounting principles set forth in the opinions and pronouncements of the Accounting
Principles Board of the American Institute of Certified Public Accountants and statements and pronouncements of the Financial Accounting Standards Board or in such other statements by such other entity as have been approved by a significant segment
of the accounting profession, which are in effect on the original issue date of the Series R Notes. 
 “Global Note
Legend” means the legend set forth in Section 1(q)(iv)(D)(1) of this Officer’s Certificate, which is required to be placed on all Global Notes issued under this Officer’s Certificate. 
 “Global Notes” means, individually and collectively, each of the Series R Notes issued or issuable in the global form of
Exhibit A hereto issued in accordance with Sections 1(q)(i) of this Officer’s Certificate, and that bears the Global Note Legend and that is deposited with or on behalf of and registered in the name of the Depositary. 
 “Guarantee” means a guarantee other than by endorsement of negotiable instruments for collection in the ordinary course
of business, direct or indirect, in any manner including, without limitation, by way of a pledge of assets or through letters of credit or reimbursement agreements in respect thereof, of all or any part of any Indebtedness. 
 “Hedging Obligations” means, with respect to any specified Person, the obligations of such Person incurred in the normal
course of business and consistent with past practices and not for speculative purposes under: 
  

	 	(1)	interest rate swap agreements, interest rate cap agreements and interest rate collar agreements designed to protect the person or entity entering into the agreement against
fluctuations in interest rates with respect to Indebtedness incurred and not for purposes of speculation; 

  

 22 

	 	(2)	foreign exchange contracts and currency protection agreements entered into with one of more financial institutions designed to protect the person or entity entering into the
agreement against fluctuations in currency exchange rates with respect to Indebtedness incurred and not for purposes of speculation; 

  

	 	(3)	any commodity futures contract, commodity option or other similar agreement or arrangement designed to protect against fluctuations in the price of commodities used by that entity
at the time; and 

  

	 	(4)	other agreements or arrangements designed to protect such Person against fluctuations in interest rates or currency exchange rates. 

 “Indebtedness” means, with respect to any specified Person, any indebtedness of such Person, whether or not contingent:

  

	 	(1)	in respect of borrowed money; 

  

	 	(2)	evidenced by bonds, notes, debentures or similar instruments or letters of credit (or reimbursement agreements in respect thereof); 

  

	 	(3)	in respect of banker’s acceptances; 

  

	 	(4)	representing Capital Lease Obligations; 

  

	 	(5)	representing the balance deferred and unpaid of the purchase price of any property, except any such balance that constitutes an accrued expense or trade payable; or

  

	 	(6)	representing any Hedging Obligations, 

 if and to the
extent any of the preceding items (other than letters of credit and Hedging Obligations) would appear as a liability upon a balance sheet of the specified Person prepared in accordance with GAAP. In addition, the term “Indebtedness”
includes all Indebtedness of others secured by a Series R Lien on any asset of the specified Person (whether or not such Indebtedness is assumed by the specified Person) and, to the extent not otherwise included, the Guarantee by the specified
Person of any indebtedness of any other Person. 
 The amount of any Indebtedness outstanding as of any date shall be:

  

	 	(1)	the accreted value of the Indebtedness, in the case of any Indebtedness issued with original issue discount; and 

  

	 	(2)	the principal amount of the Indebtedness, together with any interest on the Indebtedness that is more than 30 days past due, in the case of any other Indebtedness.

  

 23 

 “Indirect Participant” means a Person who holds a beneficial interest in
a Global Note through a Participant. 
 “Initial Notes” has the meaning set forth in Section 1(q)(ii) of
this Officer’s Certificate. 
 “Issue Date” means the first date on which any Series R Notes are issued,
authenticated and delivered under the Indenture and this Officer’s Certificate. 
 “Non-Recourse Debt”
means Indebtedness: 
  

	 	(1)	as to which neither the Company nor any of its Restricted Subsidiaries (a) provides credit support of any kind (including any undertaking, agreement or instrument that would
constitute Indebtedness), (b) is directly or indirectly liable as a guarantor or otherwise, or (c) constitutes the lender; 

  

	 	(2)	no default with respect to which (including any rights that the holders of the Indebtedness may have to take enforcement action against an Unrestricted Subsidiary) would permit upon
notice, lapse of time or both any holder of any other Indebtedness (other than the Series R Notes) of the Company or any of its Restricted Subsidiaries to declare a default on such other Indebtedness or cause the payment of the Indebtedness to be
accelerated or payable prior to its stated maturity; and 

  

	 	(3)	as to which the lenders have been notified in writing that they shall not have any recourse to the stock or assets of the Company or any of its Restricted Subsidiaries.

 “Note Custodian” means the Trustee, as custodian for the Depositary with respect to the
Series R Notes in global form, or any successor entity thereto. 
 “Obligations” means any principal,
interest, penalties, fees, indemnifications, reimbursements, damages and other liabilities payable under the documentation governing any Indebtedness. 
 “Offering” means the offering of the Original Notes by the Company on the Issue Date. 
 “Original Notes” has the meaning set forth in Section 1(q)(ii) of this Officer’s Certificate. 
 “Participant” means, with respect to DTC, Euroclear or Clearstream, a Person who has an account with DTC, Euroclear or Clearstream, respectively (and, with respect to DTC, shall include Euroclear and
Clearstream). 
 “Payment Default” has the meaning assigned to it in Section 1(h)(ii)(A)(6)(I) of this
Officer’s Certificate. 
  

 24 

 “Permitted Refinancing Indebtedness” means any Indebtedness of the
Company or any of its Restricted Subsidiaries issued in exchange for, or the net proceeds of which are used to extend, refinance, renew, replace, defease or refund other Indebtedness of the Company or any of its Restricted Subsidiaries (other than
intercompany Indebtedness); provided that: 
  

	 	(1)	the principal amount (or accreted value, if applicable) of such Permitted Refinancing Indebtedness does not exceed the principal amount (or accreted value, if applicable) of the
Indebtedness extended, refinanced, renewed, replaced, defeased or refunded (plus all accrued and unpaid interest on the Indebtedness and the amount of all expenses and premiums incurred in connection therewith); 

  

	 	(2)	if such Permitted Refinancing Indebtedness is issued on or after the first anniversary of the original issue date of the Series R Notes, such Permitted Refinancing Indebtedness has
a final maturity date later than the final maturity date of, and has a Weighted Average Life to Maturity equal to or greater than the Weighted Average Life to Maturity of, the Indebtedness being extended, refinanced, renewed, replaced, defeased or
refunded; 

  

	 	(3)	if such Permitted Refinancing Indebtedness is issued on or after the first anniversary of the original issue date of the Series R Notes, and the Indebtedness being extended,
refinanced, renewed, replaced, defeased or refunded is contractually subordinated in right of payment to the Series R Notes, such Permitted Refinancing Indebtedness has a final maturity date later than the final maturity date of, and is subordinated
in right of payment to, the Series R Notes on terms at least as favorable to the Holders of Series R Notes as those contained in the documentation governing the Indebtedness being extended, refinanced, renewed, replaced, defeased or refunded; and

  

	 	(4)	such Indebtedness is incurred either by the Company or by the Subsidiary who is the obligor on the Indebtedness being extended, refinanced, renewed, replaced, defeased or refunded.

 “Qualified Receivables Transaction” means any transaction or series of transactions that may
be entered into by the Company or any of its Restricted Subsidiaries pursuant to which the Company or any of its Restricted Subsidiaries may sell, convey or otherwise transfer to (1) a Receivables Entity (in the case of a transfer by the
Company or any of its Restricted Subsidiaries) and (2) any other Person (in the case of a transfer by a Receivables Entity), or may grant a security interest in, any accounts receivable (whether now existing or arising in the future) of the
Company or any of its Restricted Subsidiaries, and any assets related thereto including, without limitation, all collateral securing such accounts receivable, all contracts and all guarantees or other obligations in respect of such accounts
receivable, the proceeds of such receivables and other assets which are customarily transferred, or in respect of which security interests are customarily granted in connection with asset securitization involving accounts receivable. 
  

 25 

 “Receivables Entity” means a wholly-owned Subsidiary of the Company or
Sierra Pacific Resources (or another Person in which the Company or any Restricted Subsidiary of the Company makes an Investment and to which the Company or any Restricted Subsidiary of the Company transfers accounts receivable and related assets)
which engages in no activities other than in connection with the financing of accounts receivable and which is designated by the Board of Directors (as provided below) as a Receivables Entity: 
  

	 	(1)	no portion of the Indebtedness or any other obligations (contingent or otherwise) of which: 

  

	 	(a)	is guaranteed by the Company or any Restricted Subsidiary of the Company (excluding guarantees of Obligations (other than the principal of, and interest on, Indebtedness) pursuant
to Standard Securitization Undertakings); 

  

	 	(b)	is recourse to or obligates the Company or any Restricted Subsidiary of the Company in any way other than pursuant to Standard Securitization Undertakings; or

  

	 	(c)	subjects any property or asset of the Company or any Restricted Subsidiary of the Company, directly or indirectly, contingently or otherwise, to the satisfaction thereof, other than
pursuant to Standard Securitization Undertakings; 

  

	 	(2)	which is not party to any agreement, contract, arrangement or understanding (except in connection with a Purchase Money Note or Qualified Receivables Transaction) with the Company
or any Restricted Subsidiary of the Company other than on terms no less favorable to the Company or such Restricted Subsidiary than those that might be obtained at the time from Persons that are not Affiliates of the Company, other than fees payable
in the ordinary course of business in connection with servicing accounts receivable; and 

  

	 	(3)	to which neither the Company nor any Restricted Subsidiary of the Company has any direct or indirect obligation (a) to subscribe for additional Equity Interests or (b) to
maintain or preserve such entity’s financial condition or cause such entity to achieve certain levels of operating results. 

 Any such designation by the Board of Directors shall be evidenced to the Trustee by filing with the Trustee a certified copy of the Board Resolution giving effect to such designation and an Officer’s Certificate
certifying that such designation complied with the foregoing conditions. 
  

 26 

 “Restricted Subsidiary” of a Person means any Subsidiary of the referent
Person that is not an Unrestricted Subsidiary. 
 “Securities Act” means the Security Act of 1933, as
amended. 
 “Series R Lien” means, with respect to any asset, any mortgage, lien, pledge, charge, security
interest or encumbrance of any kind in respect of such asset, whether or not filed, recorded or otherwise perfected under applicable law, including any conditional sale or other title retention agreement, any lease in the nature thereof, any option
or other agreement to sell or give a security interest in and any filing of or agreement to give any financing statement under the Uniform Commercial Code (or equivalent statutes) of any jurisdiction. 
 “Series R Permitted Liens” means: 
  

	 	(1)	Series R Liens securing any Indebtedness under a Credit Facility and all Obligations and Hedging Obligations relating to such Indebtedness; 

  

	 	(2)	Series R Liens in favor of the Company or any Subsidiary Guarantors; 

  

	 	(3)	Series R Liens on property of a Person existing at the time such Person is merged with or into or consolidated with the Company or any Restricted Subsidiary of the Company;
provided that such Series R Liens were in existence prior to the contemplation of such merger or consolidation and do not extend to any assets other than those of the Person merged into or consolidated with the Company or the Restricted
Subsidiary; 

  

	 	(4)	Series R Liens on property existing at the time of acquisition of the property by the Company or any Restricted Subsidiary of the Company, provided that such Series R Liens
were in existence prior to the contemplation of such acquisition; 

  

	 	(5)	Series R Liens to secure the performance of statutory or regulatory obligations, surety or appeal bonds, performance bonds or other obligations of a like nature incurred in the
ordinary course of business; 

  

	 	(6)	Series R Liens existing on the original issue date of the Series R Notes (including the Series R Lien of the Indenture); 

  

	 	(7)	Series R Liens for taxes, assessments or governmental charges or claims that are not yet delinquent or that are being contested in good faith by appropriate proceedings promptly
instituted and diligently concluded; provided that any reserve or other appropriate provision as is required in conformity with GAAP has been made therefor; 

  

	 	(8)	Series R Liens incurred in the ordinary course of business of the Company or any Restricted Subsidiary with respect to obligations (including Hedging Obligations) that do not exceed
$35.0 million at any one time outstanding; 

  

 27 

	 	(9)	Series R Liens securing Permitted Refinancing Indebtedness incurred to refinance Indebtedness that was previously so secured; provided that any such Series R Lien is limited
to all or part of the same property or assets (plus improvements, accessions, proceeds or dividends or distributions in respect thereof) that secured (or, under the written arrangements under which the original Series R Lien arose, could secure) the
Indebtedness being refinanced or is in respect of property that is the security for a Series R Permitted Lien hereunder; 

  

	 	(10)	Series R Liens on assets transferred to a Receivables Entity or on assets of a Receivables Entity, in either case, incurred in connection with a Qualified Receivables Transaction;
and 

  

	 	(11)	Series R Liens, including pledges, rights of offset and bankers’ liens, on deposit accounts, instruments, investment accounts and investment property (including cash, cash
equivalents and marketable securities) from time to time maintained with or held by any financial and/or depository institutions, in each case solely to secure any and all obligations now or hereafter existing of the Company or any of its
Subsidiaries in connection with any deposit account, investment account or cash management service (including ACH, Fedwire, CHIPS, concentration and zero balance accounts, and controlled disbursement, lockbox or restricted accounts) now or hereafter
provided by any financial and/or depository institutions to or for the benefit of the Company, any of its Subsidiaries or any special purpose entity directly or indirectly providing loans to or making receivables purchases from the Company or any of
its Subsidiaries. 

 “Significant Subsidiary” means any Subsidiary that would be a
“significant subsidiary” as defined in Article 1, Rule 1-02 of Regulation S-X, promulgated pursuant to the Securities Act, as such Regulation is in effect on the date hereof. 
 “Standard Securitization Undertakings” means representations, warranties, covenants and indemnities entered into by the
Company or any Restricted Subsidiary of the Company which are reasonably customary in securitization of accounts receivable transactions. 
 “Subsidiary” means, with respect to any specified Person: 
  

	 	(1)	any corporation, association or other business entity of which more than 50% of the total voting power of shares of Capital Stock entitled (without regard to the occurrence of any
contingency) to vote in the election of directors, managers or trustees of the corporation, association or other business entity is at the time owned or controlled, directly or indirectly, by that Person or one or more of the other Subsidiaries of
that Person (or a combination thereof); and 

  

 28 

	 	(2)	any partnership (a) the sole general partner or the managing general partner of which is such Person or a Subsidiary of such Person or (b) the only general partners of
which are that Person or one or more Subsidiaries of that Person (or any combination thereof). 

 “Subsidiary Guarantee” means any Guarantee of the Series R Notes to be executed by any Subsidiary of the Company pursuant to Section 1(u)(iii) of this Officer’s Certificate (under the heading “Future
Subsidiary Guarantees”). 
 “Subsidiary Guarantors” means any Subsidiary of the Company that executes a
Subsidiary Guarantee in accordance with the provisions of the Indenture, and their respective successors and assigns. 
 “Triggering Event” has the meaning assigned to it in Section 1(h) of this Officer’s Certificate. 
 “Unrestricted Subsidiary” means any Subsidiary of the Company that is designated by the Board of Directors as an Unrestricted Subsidiary pursuant to a Board Resolution, but only to the extent that such Subsidiary:

  

	 	(1)	has no Indebtedness other than Non-Recourse Debt; 

  

	 	(2)	is not party to any agreement, contract, arrangement or understanding with the Company or any Restricted Subsidiary of the Company unless the terms of any such agreement, contract,
arrangement or understanding are no less favorable to the Company or such Restricted Subsidiary than those that might be obtained at the time from Persons who are not Affiliates of the Company; 

  

	 	(3)	is a Person with respect to which neither the Company nor any of its Restricted Subsidiaries has any direct or indirect obligation (a) to subscribe for additional Equity
Interests or (b) to maintain or preserve such Person’s financial condition or to cause such Person to achieve any specified levels of operating results; 

  

	 	(4)	has not guaranteed or otherwise directly or indirectly provided credit support for any Indebtedness of the Company or any of its Restricted Subsidiaries; and

  

	 	(5)	has at least one director on its Board that is not a director or executive officer of the Company or any of its Restricted Subsidiaries and has at least one executive officer that
is not a director or executive officer of the Company or any of its Restricted Subsidiaries. 

  

 29 

 Any designation of a Subsidiary of the Company as an Unrestricted Subsidiary shall be
evidenced to the Trustee by filing with the Trustee a certified copy of the Board Resolution giving effect to such designation and an Officer’s Certificate certifying that such designation complied with the preceding conditions. If, at any
time, any Unrestricted Subsidiary would fail to meet the preceding requirements as an Unrestricted Subsidiary, it shall thereafter cease to be an Unrestricted Subsidiary for purposes of the Indenture and any Indebtedness of such Subsidiary shall be
deemed to be incurred by a Restricted Subsidiary of the Company as of such date. 
 “U.S.” means the United
States of America. 
 “Voting Stock” of any Person as of any date means the Capital Stock of such Person that
is at the time entitled to vote in the election of the Board of such Person. 
 “Weighted Average Life to
Maturity” means, when applied to any Indebtedness at any date, the number of years obtained by dividing: 
  

	 	(1)	the sum of the products obtained by multiplying (a) the amount of each then remaining installment, sinking fund, serial maturity or other required payments of principal,
including payment at final maturity, in respect of the Indebtedness, by (b) the number of years (calculated to the nearest one-twelfth) that shall elapse between such date and the making of such payment; by 

  

	 	(2)	the then outstanding principal amount of such Indebtedness. 

 (v) The Series R Notes shall have such other terms and provisions as are provided in the form thereof attached hereto as Exhibit A, and shall be issued in substantially such form. 
 2. The undersigned has read all of the covenants and conditions contained in the Indenture, and the definitions in the Indenture relating thereto,
relating to the issuance of the Series R Notes and in respect of compliance with which this certificate is made. 
 The statements contained
in this certificate are based upon the familiarity of the undersigned with the Indenture, the documents accompanying this certificate, and upon discussions by the undersigned with officers and employees of the Company familiar with the matters set
forth herein. 
 In the opinion of the undersigned, he has made such examination or investigation as is necessary to enable him to express an
informed opinion as to whether or not such covenants and conditions have been complied with. 
 In the opinion of the undersigned, such
conditions and covenants have been complied with. 
  

 30 

 IN WITNESS WHEREOF, the undersigned has executed this Officer’s Certificate as of the date
first written above. 
  

			
	By:	 	  

		 	William D. Rogers
		 	Senior Vice President, Chief Financial Officer and Treasurer

 Acknowledged and Received on 
                     , 2007 
  

			
	THE BANK OF NEW YORK,
	as Trustee
		
	By:	 	  

	Name:	 	
	Title:	 	

  

 31 

 Exhibit A 
 Form of Series R Notes 
 [Insert the Global Note Legend, if applicable, pursuant to the provisions
of the Indenture and the Officer’s Certificate] 
 NEVADA POWER COMPANY 
 6.750% General and Refunding Mortgage Notes, Series R, due 2037 
  

					
	Original Interest Accrual Date:	  	June 28, 2007	  	Redeemable: Yes  x    No   ̈
	Stated Maturity:	  	July 1, 2037	  	Redemption Date: See Below
	Interest Rate:	  	6.750%	  	Redemption Price: See Below
	Interest Payment Dates:	  	July 1 and January 1	  	
	Record Dates:	  	June 15 and December 15	  	

 The Security is not a Discount Security 
 within the meaning of the within-mentioned Indenture. 
  

 CUSIP No. 641423 BU 1 
 6.750% General and
Refunding Mortgage Notes, Series R, due 2037 
  

					
	No. R-	 		 	$            
		 		 	

 promises to pay to Cede & Co. or registered assigns, the principal sum of
                             Dollars on July 1, 2037. 
 1. Interest. Nevada Power Company, a Nevada corporation (the “Company”), promises to pay interest on the principal amount of this
Series R Note at 6.750% per annum, from June 28, 2007 until maturity. The Company shall pay interest semi-annually in arrears on July 1 and January 1 of each year, or if any such day is not a Business Day, on the next succeeding Business
Day (each an “Interest Payment Date”). Interest on the Series R Notes shall accrue from the most recent date to which interest has been paid or, if no interest has been paid, from Original Interest Accrual Date specified above;
provided that if there is no existing Default in the payment of interest, and if this Series R Note is authenticated between a record date referred to on the face hereof and the next succeeding Interest Payment Date, interest shall accrue
from such next succeeding Interest Payment Date, except in the case of the original issuance of Series R Notes, in which case interest shall accrue from the Original Interest Accrual Date specified above; provided, further, that the first Interest
Payment Date shall be January 1, 2008. The Company shall pay interest (including postpetition interest in any proceeding under the Bankruptcy Law) on overdue principal and premium, if any, from time to time on demand at the rate borne on the
Series R Notes; it shall pay interest (including post-petition interest in any proceeding under the Bankruptcy Law) on overdue installments of interest, if any, (without regard to any applicable grace periods) from time to time on demand at the same
rate to the extent lawful. Interest shall be computed on the basis of a 360-day year of twelve 30-day months. 
  

 A-1 

 2. Method of Payment. The Company shall pay interest on the Series R Notes (except Defaulted
Interest) to the Persons who are registered Holders of Series R Notes at the close of business on the June 15 and December 15 next preceding the Interest Payment Date, even if such Series R Notes are canceled after such record date and on
or before such Interest Payment Date, except as provided in Section 3.07 of the Indenture with respect to Defaulted Interest. The Series R Notes shall be payable as to principal and premium and interest at the office or agency of the Company
maintained for such purpose within the City and State of New York, or, at the option of the Company, payment of interest may be made by check mailed to the Holders of Series R Notes at their addresses set forth in the register of Holders, and
provided that payment by wire transfer of immediately available funds shall be required with respect to principal of, and interest and premium on, all Global Notes and all other Series R Notes the Holders of which shall have provided wire
transfer instructions to the Company or the Paying Agent. Such payment shall be in such coin or currency of the United States of America as at the time of payment is legal tender for payment of public and private debts. 
 3. Paying Agent and Security Registrar. Initially, The Bank of New York, the Trustee under the Indenture, shall act as Paying Agent and Security
Registrar. The Company may change any Paying Agent or Security Registrar without notice to any Holder of Series R Notes. The Company or any of its Subsidiaries may act in any such capacity. 
 4. Indenture; Security. This Series R Note is one of a duly authorized issue of Securities of the Company, issued and issuable in one or more
series under and equally secured by a General and Refunding Mortgage Indenture, dated as of May 1, 2001 (such Indenture as originally executed and delivered and as supplemented or amended from time to time thereafter, together with any
constituent instruments establishing the terms of particular Securities, being herein called the “Indenture”), between the Company and The Bank of New York, Trustee (herein called the “Trustee,” which term includes
any successor Trustee under the Indenture), to which Indenture and all indentures supplemental thereto reference is hereby made for a description of the property mortgaged, pledged and held in trust, the nature and extent of the security and the
respective rights, limitations of rights, duties and immunities of the Company, the Trustee and the Holders of the Securities thereunder and of the terms and conditions upon which the Securities are, and are to be, authenticated and delivered and
secured. The acceptance of this Series R Note shall be deemed to constitute the consent and agreement by the Holder hereof to all of the terms and provisions of the Indenture. This Series R Note is one of the series designated above. The terms of
the Series R Notes include those stated in the Indenture, the Officer’s Certificate dated June 28, 2007 (the “Officer’s Certificate”) and those made part of the Indenture by reference to the Trust Indenture Act. The Series
R Notes are subject to all such terms, and Holders of Series R Notes are referred to the Indenture and such Act for a statement of such terms. To the extent any provision of this Series R Note conflicts with the express provisions of the Indenture
or the Officer’s Certificate, the provisions of the Indenture and the Officer’s Certificate shall govern and be controlling. The Series R Notes are general obligations of the Company initially limited to $350,000,000 aggregate principal
amount in the case of Series R Notes issued on the Issue Date. 
  

 A-2 

 All Outstanding Securities, including the Series R Notes, issued under the Indenture are secured by the
lien of the Indenture on the properties of the Company described in the Indenture. 
 5. Optional Redemption. 
 (a) The Company may redeem the notes at any time, either in whole or in part at a redemption price equal to the greater of (1) 100% of the principal
amount of the Series R Notes being redeemed and (2) the sum of the present values of the remaining scheduled payments of principal and interest on the Series R Notes being redeemed (excluding the portion of any such interest accrued to the date
of redemption) discounted (for purposes of determining present value) to the redemption date on a semi-annual basis (assuming a 360-day year consisting of twelve 30-day months) at the Treasury Rate (as defined below) plus 30 basis points, plus, in
each case, accrued interest thereon to the date of redemption. 
 “Comparable Treasury Issue” means the
United States Treasury security selected by an Independent Investment Banker as having a maturity comparable to the remaining term of the Series R Notes that would be utilized, at the time of selection and in accordance with customary financial
practice, in pricing new issues of corporate debt securities of comparable maturity to the remaining term of the Series R Notes. 
 “Comparable Treasury Price” means, with respect to any redemption date, (1) the average of the bid and asked prices for the Comparable Treasury Issue (expressed in each case as a percentage of its principal amount) on
the third business day preceding such redemption date, as set forth in the daily statistical release (or any successor release) published by the Federal Reserve Bank of New York and designated “Composite 3:30 p.m. Quotations for U.S. Government
Securities” or (2) if such release (or any successor release) is not published or does not contain such prices on such third business day, the Reference Treasury Dealer Quotation for such redemption date. 
 “Independent Investment Banker” means one of the Reference Treasury Dealers appointed by the Company. 
 “Reference Treasury Dealer” means a primary U.S. Government Securities Dealer selected by the Company. 
 “Reference Treasury Dealer Quotation” means, with respect to the Reference Treasury Dealer and any redemption date, the
average, as determined by the Independent Investment Banker, of the bid and asked prices for the Comparable Treasury Issue (expressed in each case as a percentage of its principal amount) quoted in writing to the Independent Investment Banker by
such Reference Treasury Dealer at or before 5:00 p.m., New York City time, on the third business day preceding such redemption date. 
 “Treasury Rate” means, with respect to any redemption date, the rate per year equal to the semi-annual equivalent yield to maturity of the Comparable Treasury 

  

 A-3 

 
Issue, assuming a price for the Comparable Treasury Issue (expressed as a percentage of its principal amount) equal to the Comparable Treasury Price for such
redemption date. 
 6. Notice of Optional Redemption. Notice of optional redemption shall be mailed at least 30 days but not more than
60 days before the Redemption Date to each Holder whose Series R Notes are to be redeemed at its registered address. Series R Notes in denominations larger than $2,000 may be redeemed in part but only in whole multiples of $1,000 in excess thereof.
Notices of redemption may not be conditional. On and after the redemption date, interest ceases to accrue on Series R Notes or portions thereof called for redemption. 
 7. Mandatory Redemption. 
 (a) Other than in connection with clause (b) below or in
connection with a redemption at the option of the Holders of the Series R Notes in Section 8 below, the Company shall not be required to make mandatory redemption or sinking fund payments with respect to the Series R Notes. 
 (b) Upon the occurrence of the events described below in clauses (1) or (2) of this paragraph 7(b), the Company shall be required to redeem the
Series R Notes immediately, at a Redemption Price equal to 100% of the aggregate principal amount of the Series R Notes plus accrued and unpaid interest on the Series R Notes to the date of redemption, without further action or notice on the part of
the Trustee or the Holders of the Series R Notes: 
  

	 	(1)	the Company or any of its Subsidiaries that is a Significant Subsidiary or any group of Subsidiaries that, taken as a whole, would constitute a Significant Subsidiary pursuant to or
within the meaning of Bankruptcy Law: 

  

	 	(I)	commences a voluntary case, 

  

	 	(II)	consents to the entry of an order for relief against it in an involuntary case, 

  

	 	(III)	consents to the appointment of a custodian of it or for all or substantially all of its property, 

  

	 	(IV)	makes a general assignment for the benefit of its creditors, or 

  

	 	(V)	admits in writing of its inability to pay its debts generally as they become due; or 

  

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

  

	 	(I)	is for relief against the Company or any of its Subsidiaries that is a Significant Subsidiary or any group of Subsidiaries that, taken as a whole, would constitute a Significant
Subsidiary in an involuntary case; 

  

 A-4 

	 	(II)	appoints a custodian of the Company or any of its Subsidiaries that is a Significant Subsidiary or any group of Subsidiaries that, taken as a whole, would constitute a Significant
Subsidiary or for all or substantially all of the property of the Company or any of its Subsidiaries that is a Significant Subsidiary or any group of Subsidiaries that, taken as a whole, would constitute a Significant Subsidiary; or

  

	 	(III)	orders the liquidation of the Company or any of its Subsidiaries that is a Significant Subsidiary or any group of Restricted Subsidiaries that, taken as a whole, would constitute a
Significant Subsidiary; 

 and the order or decree remains unstayed and in effect for 60 consecutive days.

 8. Redemption at the Option of Holders. Upon the occurrence of any of the following Triggering Events: (a) failure for 30 days
to pay when due interest on the Series R Notes; (b) failure to pay when due the principal of, or premium, if any, on the Series R Notes; (c) failure by the Company or any of its Restricted Subsidiaries to comply with the provisions
described in Section 1(u)(ii) of the Officer’s Certificate; (d) failure by the Company or any of its Restricted Subsidiaries for 30 days after notice to comply with the provisions described in Section 1(h)(iii) of the
Officer’s Certificate; (e) failure by the Company or any of its Restricted Subsidiaries for 60 days after notice to comply with any of the other agreements in the Officer’s Certificate or the Series R Notes; (f) default under any
mortgage, indenture or instrument under which there may be issued or by which there may be secured or evidenced any Indebtedness for money borrowed by the Company or any of its Restricted Subsidiaries (or the payment of which is guaranteed by the
Company or any of its Restricted Subsidiaries) whether such Indebtedness or guarantee now exists, or is created after the original issue date of the Series R Notes, if that default (i) is caused by a failure to pay principal of, or interest or
premium, if any, on such Indebtedness prior to the expiration of the grace period provided in such Indebtedness on the date of such default (a “Payment Default”) or (ii) results in the acceleration of such Indebtedness prior to
its express maturity, and, in each case, the principal amount of any such Indebtedness, together with the principal amount of any other such Indebtedness under which there has been a Payment Default or the maturity of which has been so accelerated,
aggregates $15.0 million or more; or (g) failure by the Company or any of its Subsidiaries to pay final judgments aggregating in excess of $15.0 million, which judgments are not paid, discharged or stayed for a period of 60 days; the Holders of
at least 25% in principal amount of the Series R Notes then Outstanding may deliver a notice to the Company requiring the Company to redeem the Series R Notes immediately at a Redemption Price equal to 100% of the aggregate principal amount of the
Series R Notes plus accrued and unpaid interest on the Series R Notes to the Redemption Date. The Holders of a majority in aggregate principal amount of the Series R Notes then Outstanding by notice to the Company and the Trustee may on behalf of
the Holders of all of the Series R 

  

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Notes waive any existing Triggering Event and its consequences except a continuing Triggering Event related to the payment of interest on, or the principal
of, the Series R Notes. In the case of any Triggering Event by reason of any willful action or inaction taken or not taken by or on behalf of the Company with the intention of avoiding payment of the premium that the Company would have had to pay if
the Company then had elected to redeem the Series R Notes pursuant to the provisions of Section 1(g)(i) of the Officer’s Certificate relating to redemption at the option of the Company, an equivalent premium equal to the premium payable
under Section 1(g)(i) shall also become and be immediately due and payable to the extent permitted by law upon the redemption of the Series R Notes at the option of the Holders thereof. 
 9. Denominations, Transfer, Exchange. The Series R Notes are in registered form without coupons in denominations of $2,000 and integral multiples
of $1,000 in excess thereof. The transfer of Series R Notes may be registered and Series R Notes may be exchanged as provided in the Indenture and the Officer’s Certificate. The Security Registrar and the Trustee may require a Holder of Series
R Notes, among other things, to furnish appropriate endorsements and transfer documents and the Company may require a Holder of Series R Notes to pay any taxes and fees required by law or permitted by the Indenture. The Company need not exchange or
register the transfer of any Series R Note or portion of a Series R Note selected for redemption, except for the unredeemed portion of any Series R Note being redeemed in part. Also, the Company need not exchange or register the transfer of any
Series R Notes for a period of 15 days before a selection of Series R Notes to be redeemed or during the period between a record date and the corresponding Interest Payment Date. 
 10. Persons Deemed Owners. The registered Holder of a Series R Note may be treated as its owner for all purposes. 
 11. Amendment, Supplement and Waiver. The Indenture permits, with certain exceptions as therein provided, the Trustee to enter into one or more
supplemental indentures for the purpose of adding any provisions to, or changing in any manner or eliminating any of the provisions of, the Indenture with the consent of the Holders of not less than a majority in aggregate principal amount of the
Securities of all series then Outstanding under the Indenture, considered as one class; provided, however, that if there shall be Securities of more than one Series outstanding under the Indenture and if a proposed supplemental indenture shall
directly affect the rights of the Holders of Securities of one or more, but less than all, of such series, then the consent only of the Holders of a majority in aggregate principal amount of the Outstanding Securities of all series so directly
affected, considered as one class, shall be required; and provided, further, that if the Securities of any series shall have been issued in more than one Tranche and if the proposed supplemental indenture shall directly affect the rights of the
Holders of Securities of one or more, but less than all, of such Tranches, then the consent only of the Holders of a majority in aggregate principal amount of the Outstanding Securities of all Tranches so directly affected, considered as one class,
shall be required; and provided, further, that the Indenture permits the Trustee to enter into one or more supplemental indentures for limited purposes without the consent of any Holders of Securities. The Indenture also contains provisions
permitting the Holders of a majority in principal amount of the Securities then Outstanding, on behalf of the Holders of all Securities, to waive compliance by the Company with certain provisions of the Indenture and certain past defaults under the
Indenture and their 

  

 A-6 

 
consequences. Any such consent or waiver by the Holder of this Series R Note shall be conclusive and binding upon such Holder and upon all future Holders of
this Series R Note and of any Series R Note issued upon the registration of transfer hereof or in exchange therefor or in lieu hereof, whether or not notation of such consent or waiver is made upon this Series R Note. 
 12. Events of Default. If an Event of Default shall occur and be continuing, the principal of this Series R Note may be declared due and payable
in the manner and with the effect provided in the Indenture. 
 13. No Recourse Against Others. As provided in the Indenture, no
recourse shall be had for the payment of the principal of or premium, if any, or interest on any Securities, or any part thereof, or for any claim based thereon or otherwise in respect thereof, or of the indebtedness represented thereby, or upon any
obligation, covenant or agreement under the Indenture, against, and no personal liability whatsoever shall attach to, or be incurred by, any incorporator, stockholder, officer or director, as such, past, present or future of the Company or of any
predecessor or successor corporation (either directly or through the Company or a predecessor or successor corporation), whether by virtue of any constitutional provision, statute or rule of law, or by the enforcement of any assessment or penalty or
otherwise; it being expressly agreed and understood that the Indenture and all the Securities are solely corporate obligations and that any such personal liability is hereby expressly waived and released as a condition of, and as part of the
consideration for, the execution of the Indenture and the issuance of the Securities. 
 14. Authentication. Unless the certificate of
authentication hereon has been executed by the Trustee or an Authenticating Agent by manual signature, this Series R Note shall not be entitled to any benefit under the Indenture or be valid or obligatory for any purpose. 
 15. Transfer and Exchange.  
 (a) As
provided in the Indenture and subject to certain limitations therein set forth, the transfer of this Series R Note is registrable in the Security Register, upon surrender of this Series R Note for registration of transfer at the Corporate Trust
Office of The Bank of New York in New York, New York or such other office or agency as may be designated by the Company from time to time, duly endorsed by, or accompanied by a written instrument of transfer in form satisfactory to the Company and
the Security Registrar duly executed by, the Holder hereof or his attorney duly authorized in writing, and thereupon one or more new Series R Notes of this series or authorized denominations and of like tenor and aggregate principal amount, will be
issued to the designated transferee or transferees. 
 (b) No service charge shall be made for any such registration of transfer or exchange,
but the Company may require payment of a sum sufficient to cover any tax or other governmental charge payable in connection therewith. 
 (c)
Prior to due presentment of this Series R Note for registration of transfer, the Company, the Trustee and any agent of the Company or the Trustee may treat the Person in whose name this Series R Note is registered as the absolute owner hereof for
all purposes, whether or not this Series R Note be overdue, and neither the Company, the Trustee nor any such agent shall be affected by notice to the contrary. 
  

 A-7 

 16. Governing Law. The Series R Notes shall be governed by and construed in
accordance with the laws of the State of New York. 
 17. Definition of “Business Day” and Other Terms. As used herein,
“Business Day” shall mean any day, other than Saturday or Sunday, on which commercial banks are open for business, including dealings in deposits in U.S. dollars, in New York. All other terms used in this Series R Note which are
defined in the Indenture or the Officer’s Certificate shall have the meanings assigned to them in the Indenture or the Officer’s Certificate, as applicable, unless otherwise indicated. 
 18. Abbreviations. Customary abbreviations may be used in the name of a Holder of Series R Notes or an assignee, such as: TEN COM (= tenants in
common), TEN ENT (= tenants by the entireties), JT TEN joint tenants with right of survivorship and not as tenants in common), CUST (= Custodian), and U/G/M/A (= Uniform Gifts to Minors Act). 
 19. CUSIP Numbers. Pursuant to a recommendation promulgated by the Committee on Uniform Security Identification Procedures, the Company has caused
CUSIP numbers to be printed on the Series R Notes and the Trustee may use CUSIP numbers in notices of redemption as a convenience to Holders of Series R Notes. No representation is made as to the accuracy of such numbers either as printed on the
Series R Notes or as contained in any notice of redemption and reliance may be placed only on the other identification numbers placed thereon. 
 The Company shall furnish to any Holder of Series R Notes upon written request and without charge a copy of the Indenture. Requests may be made to: 
 Nevada Power Company 
 P.O. Box 230 
 6226 W. Sahara Avenue 
 Las Vegas, Nevada 89146 
 Attention: Chief Financial Officer 
  

 A-8 

 IN WITNESS WHEREOF, the Company has caused this instrument to be duly executed. 
  

			
	NEVADA POWER COMPANY
		
	By:	 	  

 CERTIFICATE OF AUTHENTICATION 
 This is one of the Securities of the series designated therein referred to in the within-mentioned Indenture. 
 Dated:                      
  

			
	THE BANK OF NEW YORK, as Trustee
		
	By:	 	  

		 	Authorized Signatory

  

 A-9 

			
	Assignment Form
	
	To assign this Series R Note, fill in the form below: (I) or (we) assign and transfer this Series R
	Note to
	
	  

	(Insert assignee’s soc. sec. or tax I.D. no.)
	
	  

	
	  

	
	  

	
	  

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

	to transfer this Series R Note on the books of the Company. The agent may substitute another to act for him.
	
	  

		
	Date:	 	
	Your Signature:	 	  

		 	(Sign exactly as your name appears on the face of this Series R Note)
	
	SIGNATURE GUARANTEE
	
	  

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

  

 A-10 

 Option of Holder to Elect Purchase 
 If you want to elect to have this Series R Note purchased by the Company pursuant to Section 1(h)(iii) (Offer to Purchase upon Change of Control) of
the Officer’s Certificate, check the box below: 
  

	 	 ̈	Section 1(h)(iii) (Offer to Purchase 

 upon Change of
Control) 
 If you want to elect to have only part of the Series R Note purchased by the Company pursuant to Section 1(h)(iii) (Offer to
Purchase upon Change of Control) of the Indenture, state the amount you elect to have purchased: 
 $
                     
 Date: 
  
  

			
	Your Signature:	 	  

		 	(Sign exactly as your name appears on the face of the Series R Note)

  

			
	Tax Identification No.:	 	  

 SIGNATURE GUARANTEE 
  

	
	  

  

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

  

 A-11

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