**Exhibit 4(b)**

**THIRD SUPPLEMENTAL INDENTURE**

Third Supplemental Indenture (this “Supplemental Indenture”), dated as of April 14, 2010, among Energy FutureHoldings Corp., a Texas corporation (the “Issuer”), the Guarantors named on the signature pages hereto (the “Guarantors”) and The Bank of New York Mellon Trust Company, N.A., as Trustee (the“Trustee”). 

**W I T N E S S E T H**

WHEREAS, each of the Issuer and the Guarantors has heretofore executed and delivered to the Trustee an Indenture, dated as ofJanuary 12, 2010 (the “Original Indenture”), providing for the issuance of $500,000,000 in aggregate principal amount of 10.000% Senior Secured Notes due 2020 on the Issue Date (the “Initial Notes”), a FirstSupplemental Indenture, dated as of March 16, 2010 (the “First Supplemental Indenture”), providing for the issuance of $34,000,000 in aggregate principal amount of Additional Notes on March 16, 2010 (the “MarchAdditional Notes”), a Second Supplemental Indenture, dated as of April 13, 2010 (the “Second Supplemental Indenture”), providing for the issuance of $10,609,000 in aggregate principal amount of Additional Notes onApril 13, 2010 (the “First April Additional Notes”) and an unlimited aggregate principal amount of Additional Notes subsequent to the Issue Date; 

WHEREAS, on January 12, 2010, the Company issued and sold the Initial Notes; 

WHEREAS, the Company desires to issue $55,041,000 aggregate principal amount of Additional Notes on the date hereof (the “NewAdditional Notes”); 

WHEREAS, Section 2.01(d) of the Indenture provides for the issuance from time to time ofAdditional Notes by the Issuer, which Additional Notes shall be consolidated with and form a single class with the Initial Notes, the March Additional Notes and the First April Additional Notes; 

WHEREAS, Section 9.01(9) of the Indenture provides that the Issuer, the Guarantors and the Trustee may amend or supplement theIndenture at any time after the Issue Date without the consent of any Holder to provide for the issuance of Additional Notes; 

WHEREAS, all conditions necessary to authorize the execution and delivery of this Supplemental Indenture and to make this SupplementalIndenture valid and binding have been complied with or have been done or performed; and 

WHEREAS, pursuant toSection 9.01 of the Indenture, the Trustee is authorized to execute and deliver this Supplemental Indenture. 

NOWTHEREFORE, in consideration of the foregoing and for other good and valuable consideration, the receipt of which is hereby acknowledged, the parties mutually covenant and agree for the equal and ratable benefit of the Holders of the New AdditionalNotes as follows: 

1. CAPITALIZED TERMS. Capitalized terms used herein without definition shallhave the meanings assigned to them in the Indenture. 

2. NEW ADDITIONAL NOTES. Pursuant to thisSupplemental Indenture, the New Additional Notes are hereby designated as “Additional Notes” under the Indenture, and are being originally issued by the Issuer on the date hereof in an aggregate principal amount of $55,041,000, which shallincrease the aggregate principal amount of, and shall be consolidated and form a single series with the Initial Notes, the March Additional Notes and the First April Additional Notes. The New Additional Notes issued hereunder shall be treated as asingle class with the Initial Notes, the March Additional Notes and the First April Additional Notes for all purposes under the Indenture, including, without limitation, for purposes of waivers, amendments, redemptions and offers to purchase. Unlessthe context requires otherwise, references to “Notes” for all purposes under the Indenture, as supplemented by this Supplemental Indenture, shall include the New Additional Notes. The New Additional Notes shall be issued in global form inminimum denominations of $2,000 and integral multiples of $1,000 in excess thereof in substantially the form of Exhibit A hereto. The terms and provisions of the New Additional Notes set forth in Exhibit A hereto shall constitute andare expressly made a part of this Supplemental Indenture. 

3. GUARANTEES. The Guarantors hereby confirm,jointly and severally, that their respective Guarantees as Guarantors under the Indenture shall apply to the obligations of the Issuer under the New Additional Notes as set forth in Article 11 of the Indenture. 

4. GOVERNING LAW. THIS SUPPLEMENTAL INDENTURESHALLBEGOVERNEDBY, ANDCONSTRUEDINACCORDANCEWITH, THELAWSOFTHE STATEOF NEW YORK. 

5.RATIFICATION, CONFIRMATIONAND PRESERVATIONOF INDENTURE. Except as expressly supplemented hereby, the Indenture continues in full force and effect and is inall respects confirmed, ratified and preserved and the provisions thereof shall be applicable to the New Additional Notes and this Supplemental Indenture. Upon the execution and delivery of this Supplemental Indenture by the Issuer, the Guarantorsand the Trustee, this Supplemental Indenture shall form a part of the Indenture for all purposes, and the Issuer, the Guarantors, the Trustee and every Holder of Notes heretofore or hereafter authenticated and delivered shall be bound hereby. Anyand all references to the “Indenture,” whether within the Indenture or in any notice, certificate or other instrument or document, shall be deemed to include a reference to this Supplemental Indenture (whether or not made), unless thecontext shall otherwise require. 

6. INDENTUREAND SUPPLEMENTALINDENTURE CONSTRUED TOGETHER. This Supplemental Indenture is an indenture supplemental to the Indenture, and the Indenture and this Supplemental Indenture shall henceforth be read and construed togetherfor all purposes. 

7. BENEFITSOF SUPPLEMENTAL INDENTURE. Nothingin this Supplemental Indenture, express or implied, shall give to any Person other than the parties hereto and their successors hereunder, and the Holders of the New Additional Notes, any benefit of any legal or equitable right, remedy or claimunder the Indenture, this Supplemental Indenture or the New Additional Notes. 

 

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8. CONFLICTWITH TRUST INDENTUREACT. If any provision of this Supplemental Indenture limits, qualifies or conflicts with any provision of the Trust Indenture Act that is required under the Trust Indenture Act to be part of and govern any provision of thisSupplemental Indenture, the provision of the Trust Indenture Act shall control. If any provision of this Supplemental Indenture modifies or excludes any provision of the Trust Indenture Act that may be so modified or excluded, the provision of theTrust Indenture Act shall be deemed to apply to the Indenture as so modified or to be excluded by this Supplemental Indenture, as the case may be. 

9. SUCCESSORS. All agreements of the Issuer in this Supplemental Indenture shall bind its successors. All agreements ofthe Trustee in this Supplemental Indenture shall bind its successors. All agreements of each Guarantor in this Supplemental Indenture shall bind its successors, except as otherwise provided in Section 11.06 of the Indenture. 

10. THE TRUSTEE. The Trustee makes no representations as to the validity or sufficiency of thisSupplemental Indenture. The statements and recitals herein are deemed to be those of the Issuer and the Guarantors, as applicable, and not of the Trustee. 

11. COUNTERPARTS. The parties may sign any number of copies of this Supplemental Indenture. Each signed copy shall be anoriginal, but all of them together represent the same agreement. 

12. HEADINGS, ETC. Theheadings of the Sections of this Supplemental Indenture have been inserted for convenience of reference only, are not to be considered a part of this Supplemental Indenture and shall in no way modify or restrict any of the terms or provisionshereof. 

13. SEVERABILITY. In case any provision in this Supplemental Indenture shall be invalid, illegal orunenforceable, the validity, legality and enforceability of the remaining provisions shall not in any way be affected or impaired thereby. 

*[Remainder of Page Left Intentionally Blank]*

 

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IN WITNESS WHEREOF, the parties hereto have caused this Supplemental Indenture to be dulyexecuted and attested, all as of the date first above written. 

 
**ENERGY FUTURE HOLDINGS CORP.**By: 
/s/ Anthony R. Horton
 Name: Anthony R. Horton Title: Senior Vice President and Treasurer**ENERGY FUTURE COMPETITIVE HOLDINGS COMPANY,**as Guarantor****By: 
/s/ Anthony R. Horton
 Name: Anthony R. Horton Title: Treasurer**ENERGY FUTURE INTERMEDIATE HOLDING COMPANY LLC,**as Guarantor****By: 
/s/ Anthony R. Horton
 Name: Anthony R. Horton Title: Senior Vice President and Treasurer**THE BANK OF NEW YORK MELLON TRUST COMPANY, N.A.,**as Trustee****By: 
/s/ Rafael Martinez
 Name: Rafael Martinez Title: Senior Associate
[Signature Page toThird Supplemental Indenture] 

EXHIBIT A 

**[Form of Face of Note]**

[Insert the Global Note Legend, if applicable pursuant to the provisions of the Indenture] 

[Insert the Private Placement Legend, if applicable pursuant to the provisions of the Indenture] 

CUSIP: [            ]* 

ISIN: [            ] 

[144A] [REGULATION S] GLOBAL NOTE 

10.000% Senior Secured Notes due 2020 

No. [    ] 

**ENERGY FUTURE HOLDINGS CORP.**

promises to pay to CEDE & CO. or registered assigns, the principal sum set forth on the Schedule of Exchanges of Interests in the Global Noteattached hereto on January 15, 2020. 

Interest Payment Dates: January 15 and July 15 

Record Dates: January 1 and July 1 

 

 
*Rule 144A Note CUSIP / ISIN: [292680 AG0] / [US292680AG02]   Regulation S Note CUSIP / ISIN: [U29191 AD2] / [USU29191AD22] 
 

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IN WITNESS HEREOF, the Issuer has caused this instrument to be duly executed. 

Dated:                     , 20__ 

 
ENERGY FUTURE HOLDINGS CORP.By: 
 
 Name:  Title: 
This is one of the Notes referred to in the within-mentioned Indenture: 

 
THE BANK OF NEW YORK MELLON TRUST COMPANY, N.A., as TrusteeBy: 
 
 Authorized Signatory
 

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**[Form of Reverse of Note]**

This Note is one of a duly authorized series of Notes of the Issuer designated as the “10.000% Senior Secured Notes due 2020”(the “Notes”), originally issued in an aggregate principal amount of $500,000,000 on January 12, 2010, and, as a result of the further issuance of $34,000,000 aggregate principal amount of Notes on March 16, 2010, afurther issuance of $10,609,000 aggregate principal amount of Notes on April 13, 2010 and a further issuance of $55,041,000 aggregate principal amount of Notes on April 14, 2010, now issued in an aggregate principal amount of $599,650,000,under the Indenture referred to below. 

Capitalized terms used herein shall have the meanings assigned to them in theIndenture referred to below unless otherwise indicated. 

(1) *INTEREST*. Energy FutureHoldings Corp., a Texas corporation (the “Issuer”), promises to pay interest on the principal amount of this Note at 10.000% perannum from January 12, 2010 until maturity and shall pay Additional Interest,if any, payable pursuant to the Registration Rights Agreement referred to below. The Issuer will pay interest and Additional Interest, if any, semi-annually in arrears on January 15 and July 15 of each year, or if any such day is not aBusiness Day, on the next succeeding Business Day (each, an “Interest Payment Date”) without interest accruing on the amount then so payable from such day that is not a Business Day until such Business Day. Interest on the Noteswill accrue from the most recent date to which interest has been paid or, if no interest has been paid, from and including January 12, 2010. The Issuer will pay interest (including post-petition interest in any proceeding under any BankruptcyLaw) on overdue principal and premium, if any, from time to time on demand at the interest rate on the Notes; it shall pay interest (including post-petition interest in any proceeding under any Bankruptcy Law) on overdue installments of interest andAdditional Interest, if any (without regard to any applicable grace periods) from time to time on demand at the interest rate on the Notes. Interest will be computed on the basis of a 360-day year comprised of twelve 30-day months. 

(2) *METHODOF PAYMENT*. The Issuer will pay interest on the Notes andAdditional Interest, if any, to the Persons who are registered Holders of Notes at the close of business on the January 1 or July 1 (whether or not a Business Day), as the case may be, next preceding the Interest Payment Date, even if suchNotes are canceled after such Record Date and on or before such Interest Payment Date, except as provided in Section 2.12 of the Indenture with respect to defaulted interest. Payment of interest and Additional Interest, if any, may be made bycheck mailed to the Holders at their addresses set forth in the register of Holders; provided that payment by wire transfer of immediately available funds will be required with respect to principal, premium, if any, and interest andAdditional Interest, if any, on, all Global Notes and all other Notes the Holders of which shall have provided wire transfer instructions to the Issuer or the Paying Agent. Such payment shall be in such coin or currency of the United States ofAmerica as at the time of payment is legal tender for payment of public and private debts. 

(3) *PAYINGAGENTAND REGISTRAR*. Initially, The Bank of New York Mellon Trust Company, N.A., the Trustee under the Indenture, will act as Paying Agent and Registrar. The Issuer may change anyPaying Agent or Registrar without notice to the Holders. The Issuer or any of its Subsidiaries may act in any such capacity. 

(4) *INDENTURE*. The Issuer issued the Notes under an Indenture, dated as of January 12, 2010(the “Original Indenture”), as supplemented by the First Supplemental Indenture, dated as of March 16, 2010, the Second Supplemental Indenture, dated as of April 13, 2010, and the Third Supplemental Indenture, dated as ofApril 14, 2010 (together with the Original Indenture as it may be amended or supplemented from time to time in accordance with its terms, the “Indenture”), among the Issuer, the Guarantors named therein and the Trustee. TheIssuer shall be entitled to issue Additional Notes pursuant 

 

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to Sections 2.01, 4.09 and 4.12 of the Indenture. The terms of the Notes include those stated in the Indenture and those made part of the Indenture by reference to the Trust Indenture Act of1939, as amended (the “Trust Indenture Act”). The Notes are subject to all such terms, and Holders are referred to the Indenture and such Act for a statement of such terms. To the extent any provision of this Note conflicts with theexpress provisions of the Indenture, the provisions of the Indenture shall govern and be controlling. 

(5)*OPTIONAL REDEMPTION*. 

(a) Except as set forth below, the Issuer will not beentitled to redeem Notes at its option prior to January 15, 2015. 

(b) At any time prior to January 15, 2015, theIssuer may redeem all or a part of the Notes, upon not less than 30 nor more than 60 days’ prior notice mailed by first class mail to the registered address of each Holder of Notes or otherwise in accordance with procedures of DTC, at aredemption price equal to 100% of the principal amount of the Notes redeemed plus the Applicable Premium, plus accrued and unpaid interest, and Additional Interest, if any, to the date of redemption (the “RedemptionDate”), subject to the right of Holders of Notes of record on the relevant Record Date to receive interest due on the relevant Interest Payment Date. 

(c) From and after January 15, 2015, the Issuer may redeem the Notes, in whole or in part, upon not less than 30 nor more than 60days’ prior notice mailed by first class mail to the registered address of each Holder of Notes or otherwise in accordance with the procedures of DTC, at the redemption prices (expressed as percentages of principal amount of the Notes to beredeemed) set forth below, plus accrued and unpaid interest and Additional Interest, if any, to the applicable Redemption Date, subject to the right of Holders of Notes of record on the relevant Record Date to receive interest due on the relevantInterest Payment Date, if redeemed during the twelve-month period beginning on January 15 of each of the years indicated below: 

 

**Year**
  **Percentage** 
2015
  105.000% 
2016
  103.333% 
2017
  101.667% 
2018 and thereafter
  100.000% 
(d) Prior toJanuary 15, 2013, the Issuer may, at its option, on one or more occasions, redeem up to 35% of the aggregate principal amount of all Notes at a redemption price equal to 110.000% of the aggregate principal amount thereof, plus accrued andunpaid interest and Additional Interest, if any, to the Redemption Date, subject to the right of Holders of Notes of record on the relevant Record Date to receive interest due on the relevant Interest Payment Date, with the net cash proceeds of oneor more Equity Offerings; provided that at least 50% of the sum of the original aggregate principal amount of Initial Notes and any Additional Notes issued under the Indenture after the Issue Date remains outstanding immediately after theoccurrence of each such redemption; providedfurther that each such redemption occurs within 90 days of the date of closing of each such Equity Offering. Notice of any redemption upon any Equity Offerings may be given prior to theredemption thereof, and any such redemption or notice may, at the Issuer’s discretion, be subject to one or more conditions precedent, including, but not limited to, completion of the related Equity Offering. 

(e) If the Issuer redeems less than all of the outstanding Notes, the Trustee shall select the Notes to be redeemed in the mannerdescribed under Section 3.02 of the Indenture. 

 

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(f) Any redemption pursuant to this paragraph (5) shall be made pursuant to theprovisions of Sections 3.01 through 3.06 of the Indenture. 

(6) *MANDATORYREDEMPTION*. The Issuer shall not be required to make mandatory redemption or sinking fund payments with respect to the Notes. 

(7) *NOTICEOF REDEMPTION*. Subject to Section 3.03 of theIndenture, notice of redemption will be mailed by first-class mail at least 30 days but not more than 60 days before the Redemption Date (except that redemption notices may be mailed more than 60 days prior to a Redemption Date if the notice isissued in connection with Article 8 or Article 12 of the Indenture) to each Holder whose Notes are to be redeemed at its registered address or otherwise in accordance with the procedures of DTC. Notes in denominations larger than $2,000 may beredeemed in part but only in whole multiples of $1,000 in excess thereof, unless all of the Notes held by a Holder are to be redeemed. On and after the Redemption Date interest ceases to accrue on Notes or portions thereof called for redemption.

(8) *OFFERSTO REPURCHASE*. 

(a) If a Change of Control occurs, the Issuer shall make an offer (a “Change of Control Offer”) to each Holder topurchase all or any part (equal to $2,000 or an integral multiple of $1,000 in excess thereof) of each Holder’s Notes at a purchase price equal to 101% of the aggregate principal amount thereof plus accrued and unpaid interest andAdditional Interest, if any, to the date of purchase (the “Change of Control Payment”), subject to the right of Holders of Notes of record on the relevant Record Date to receive interest due on the relevant Interest Payment Date.The Change of Control Offer shall be made in accordance with Section 4.14 of the Indenture. 

(b) If the Issuer or any ofits Restricted Subsidiaries consummates an Asset Sale (other than an Asset Sale of Collateral or other Oncor-related Assets), within 10 Business Days of each date that the aggregate amount of Excess Proceeds exceeds $200.0 million, the Issuer and/orany of its Restricted Subsidiaries shall make an offer to all Holders of the Notes, and if required or permitted by the terms of any Senior Indebtedness, to the holders of such Senior Indebtedness (an “Asset Sale Offer”), topurchase the maximum aggregate principal amount of the Notes and such Senior Indebtedness that is a minimum of $2,000 or an integral multiple of $1,000 in excess thereof that may be purchased out of the Excess Proceeds at an offer price in cash inan amount equal to 100% of the principal amount thereof, plus accrued and unpaid interest and Additional Interest, if any, to the date fixed for the closing of such offer, in accordance with the procedures set forth in the Indenture. To theextent that the aggregate amount of Notes, and such Senior Indebtedness tendered pursuant to an Asset Sale Offer is less than the Excess Proceeds, the Issuer and/or any of its Restricted Subsidiaries may use any remaining Excess Proceeds for generalcorporate purposes, subject to other covenants contained in the Indenture. If the aggregate principal amount of Notes or such Senior Indebtedness surrendered by such holders thereof exceeds the amount of Excess Proceeds, the Notes and such SeniorIndebtedness will be purchased on a prorata basis based on the accreted value or principal amount of the Notes or such Senior Indebtedness tendered. 

(c) The Issuer and/or any of its Restricted Subsidiaries may, at its/their option, make an Asset Sale Offer using proceeds from any AssetSale at any time after consummation of such Asset Sale (other than an Asset Sale of Collateral or other Oncor-related Assets); provided that such Asset Sale Offer shall be in an aggregate amount of not less than $25.0 million. Uponconsummation of such Asset Sale Offer, any Net Proceeds not required to be used to purchase Notes shall not be deemed Excess Proceeds. 

(d) If the Issuer or any of its Restricted Subsidiaries consummates an Asset Sale of Collateral or other Oncor-related Assets, within 10Business Days of each date that the aggregate amount of Collateral Excess Proceeds exceeds $200.0 million, the Issuer and/or any of its Restricted Subsidiaries 

 

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shall make an offer to all Holders of the Notes and, if required or permitted by the terms of any Parity Lien Debt, to the holders of such Parity Lien Debt (a “Collateral Asset SaleOffer”), to purchase the maximum aggregate principal amount of the Notes and such Parity Lien Debt that is a minimum of $2,000 or an integral multiple of $1,000 in excess thereof that may be purchased out of the Collateral Excess Proceedsat an offer price in cash in an amount equal to 100% of the principal amount thereof, plus accrued and unpaid interest and Additional Interest, if any, to the date fixed for the closing of such offer, in accordance with the procedures setforth in the Indenture. To the extent that the aggregate amount of Notes and such Parity Lien Debt tendered pursuant to a Collateral Asset Sale Offer is less than the Collateral Excess Proceeds, the Issuer and/or any of its Restricted Subsidiariesmay use any remaining Collateral Excess Proceeds for general corporate purposes, subject to other covenants contained in the Indenture and the terms of such Parity Lien Debt. If the aggregate principal amount of Notes or the Parity Lien Debtsurrendered by such holders thereof exceeds the amount of Collateral Excess Proceeds, the Notes and such Parity Lien Debt will be purchased on a prorata basis based on the accreted value or principal amount of the Notes or such ParityLien Debt tendered. 

(e) The Issuer and/or any of its Restricted Subsidiaries may, at its/their option, make a CollateralAsset Sale Offer using proceeds from any Asset Sale of Collateral or other Oncor-related Assets at any time after consummation of such Asset Sale; *provided*that such Collateral Asset Sale Offer shall be in an aggregate amount of not less than$25.0 million. Upon consummation of such Collateral Asset Sale Offer, any Net Proceeds not required to be used to purchase Notes shall not be deemed Collateral Excess Proceeds and the Issuer and its Restricted Subsidiaries may use any remainingNet Proceeds for general corporate purposes, subject to the other covenants contained in the Indenture. 

(9)*DENOMINATIONS, TRANSFER, EXCHANGE*. The Notes are in registered form without coupons in denominations of $2,000 and integral multiples of $1,000 in excess thereof. The transfer ofNotes may be registered and Notes may be exchanged as provided in the Indenture. The Registrar and the Trustee may require a Holder, among other things, to furnish appropriate endorsements and transfer documents and the Issuer may require a Holderto pay any taxes and fees required by law or permitted by the Indenture. The Issuer need not exchange or register the transfer of any Notes or portion of Notes selected for redemption, except for the unredeemed portion of any Notes being redeemed inpart. Also, the Issuer need not exchange or register the transfer of any Notes for a period of 15 days before a selection of Notes to be redeemed. 

(10) *PERSONS DEEMED OWNERS*. The registered Holder of a Note may betreated as its owner for all purposes. 

(11) *AMENDMENT, SUPPLEMENTANDWAIVER*. The Indenture, the Guarantees or the Notes may be amended or supplemented as provided in the Indenture. 

(12) *DEFAULTSAND REMEDIES*. The Events of Default relating to theNotes are defined in Section 6.01 of the Indenture. If any Event of Default occurs and is continuing, the Trustee or the Holders of at least 30% in aggregate principal amount of the then outstanding Notes may declare the principal, premium, ifany, interest and any other monetary obligations on all the then outstanding Notes to be due and payable immediately. Notwithstanding the foregoing, in the case of an Event of Default arising from certain events of bankruptcy or insolvency, alloutstanding Notes will become due and payable immediately without further action or notice. Holders may not enforce the Indenture, the Notes or the Guarantees except as provided in the Indenture. Subject to certain limitations, Holders of a majorityin aggregate principal amount of the then outstanding Notes may direct the Trustee in its exercise of any trust or power. The Trustee may withhold from Holders of the Notes notice of any continuing Default (except a Default relating to the paymentof principal, premium, if any, interest or Additional Interest, if any) if it determines that withholding notice is in their interest. The Holders of a 

 

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majority in aggregate principal amount of the then outstanding Notes by notice to the Trustee may on behalf of the Holders of all of the Notes waive any existing Default or and its consequencesunder the Indenture except a continuing Default in payment of the principal, premium, if any, interest or Additional Interest, if any, on, any of the Notes held by a non-consenting Holder. The Issuer and each Guarantor (to the extent that suchGuarantor is so required under the Trust Indenture Act) is required to deliver to the Trustee annually a statement regarding compliance with the Indenture, and the Issuer is required within five Business Days after becoming aware of any Default, todeliver to the Trustee a statement specifying such Default and what action the Issuer proposes to take with respect thereto. 

(13) *AUTHENTICATION*. This Note shall not be entitled to any benefit under the Indenture or be validor obligatory for any purpose until authenticated by the manual signature of the Trustee. 

(14) *ADDITIONALRIGHTSOF HOLDERSOF RESTRICTED GLOBAL NOTESAND RESTRICTED DEFINITIVENOTES*. In addition to the rights provided to Holders of Notes under the Indenture, Holders of Restricted Global Notes and Restricted Definitive Notes shall have all the rights set forth in the registration rightsletter agreement, dated as of April 13, 2010, among the Issuer, the Guarantors named therein and the other parties named on the signature pages thereof (the “Registration Rights Agreement”), including the right to receiveAdditional Interest, if any (as defined in the Registration Rights Agreement). 

(15) *GOVERNING LAW*. THE INDENTURE, THENOTES AND THE GUARANTEES SHALL BE GOVERNED BY, AND CONSTRUED IN ACCORDANCE WITH, THE LAWS OF THE STATE OF NEW YORK. 

(16)*CUSIP/ISIN**NUMBERS*. Pursuant to a recommendation promulgated by the Committee on Uniform Security Identification Procedures, the Issuer has caused CUSIP/ISIN numbers to be printed on the Notes and theTrustee may use CUSIP/ISIN numbers in notices of redemption as a convenience to Holders. No representation is made as to the accuracy of such numbers either as printed on the Notes or as contained in any notice of redemption and reliance may beplaced only on the other identification numbers placed thereon. 

The Issuer will furnish to any Holder upon written requestand without charge a copy of the Indenture, the Registration Rights Agreement and/or the Security Documents. Requests may be made to the Issuer at the following address: 

Energy Future Holdings Corp. 

Energy Plaza 

1601 Bryan Street 

Dallas, Texas 75201-3411 

Facsimile No.: (214) 812-6032 

Attention: General Counsel 

And 

FacsimileNo.: (214) 812-4097 

Attention: Treasurer 

 

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**ASSIGNMENT FORM**

To assign this Note, fill in the form below: 

(I) or (we) assign and transfer this Note to:                                                                                                                                              

(Insertassignee’s legal name)         

 

 

(Insert assignee’s Soc. Sec. ortax I.D. no.) 

 

 

 

 

 

 

 

 

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

and irrevocably appoint                                                                                                                                                                                

to transfer this Note on the books of the Issuer. The agent maysubstitute another to act for him. 

 
Date:                          Your Signature 
 
   (Sign exactly as your name appears on the   face of this Note)
SignatureGuarantee*:                                                            

 
*Participant in a recognized Signature Guarantee Medallion Program (or other signature guarantor acceptable to the Trustee). 
 

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**OPTION OF HOLDER TO ELECT PURCHASE**

If you want to elect to have this Note purchased by the Issuer pursuant to Section 4.10(d), 4.10(h) or 4.14 of the Indenture, checkthe appropriate box below: 

 
 ̈  Section 4.10(d)  ̈  Section 4.10(h)  ̈  Section 4.14
If you want to elect to have only part of this Note purchased by the Issuer pursuant to Section 4.10(d), 4.10(h) orSection 4.14 of the Indenture, state the amount you elect to have purchased: 

 
$                    Date:                      Your Signature: 
 
  (Sign exactly as your name appears on the face of this Note)  Tax Identification No.:                                                                        
SignatureGuarantee*:                                                            

 
*Participant in a recognized Signature Guarantee Medallion Program (or other signature guarantor acceptable to the Trustee). 
 

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**SCHEDULE OF EXCHANGES OF INTERESTS IN THE GLOBAL NOTE**

The initial outstanding principal amount of this Global Note is $55,041,000. The following exchanges of a part of this Global Note for aninterest in another Global Note or for a Definitive Note, or exchanges of a part of another Global or Definitive Note for an interest in this Global Note, have been made: 

 

**Date of Exchange**
 
**Amount of**

**decrease in**

**Principal Amount**
 
**Amount of increase**

**in Principal**

**Amount of this**

**Global Note**
 
**Principal Amount**

**of this Global**

**Note following**

**each decrease or**

**increase**
 
**Signature of**

**authorized officer**

**of Trustee or**

**Custodian**
    
 

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