Document:

Supplemental Indenture

 Exhibit 4.1 
 SUPPLEMENTAL INDENTURE 
 SUPPLEMENTAL INDENTURE (this “Supplemental
Indenture”) dated as of March 1, 2012, among CAESARS ENTERTAINMENT OPERATING COMPANY, INC., a Delaware corporation (the “New Issuer”), and U.S. BANK NATIONAL ASSOCIATION, a national banking association, as trustee
under the indenture referred to below (the “Trustee”). 
 W I T N E S S E T H : 

WHEREAS CAESARS OPERATING ESCROW LLC, a Delaware limited liability company, CAESARS ESCROW CORPORATION, a Delaware corporation (together,
the “Escrow Issuer”) and CAESARS ENTERTAINMENT CORPORATION, a Delaware corporation (the “Parent Guarantor”) have heretofore executed and delivered to the Trustee an indenture (as amended, supplemented or otherwise
modified, the “Indenture”) dated as of February 14, 2012, providing for the issuance of the Escrow Issuer’s Senior Secured Notes due 2020 (the “Notes”), initially in the aggregate principal amount of
$1,250,000,000; 
 WHEREAS Section 14.01 of the Indenture provides that the New Issuer may execute and deliver to the
Trustee a supplemental indenture pursuant to which the New Issuer shall unconditionally assume all the Escrow Issuer’s Obligations under the Notes and the Indenture on the terms and conditions set forth herein; and 

WHEREAS pursuant to Section 9.01 of the Indenture, the Trustee, the New Issuer and the Parent Guarantor are authorized to execute
and deliver this Supplemental Indenture; 
 NOW THEREFORE, in consideration of the foregoing and for other good and valuable
consideration, the receipt of which is hereby acknowledged, the New Issuer, the Parent Guarantor, the Escrow Issuer and the Trustee mutually covenant and agree for the equal and ratable benefit of the holders of the Notes as follows: 

1. Defined Terms. As used in this Supplemental Indenture, terms defined in the Indenture or in the preamble or recital hereto are
used herein as therein defined, except that the term “holders” in this Supplemental Indenture shall refer to the term “holders” as defined in the Indenture and the Trustee acting on behalf of and for the benefit of
such holders. The words “herein,” “hereof” and “hereby” and other words of similar import used in this Supplemental Indenture refer to this Supplemental Indenture as a whole and not to any
particular section hereof. 
 2. Agreement to Assume Obligations. The New Issuer hereby agrees to unconditionally assume
the Issuer’s Obligations under the Notes and the Indenture on the terms and subject to the conditions set forth in Article XIV of the Indenture and to be bound by all other applicable provisions of the Indenture and the Notes and to perform all
of the obligations and agreements of the Issuer under the Indenture. 
 3. Notices. All notices or other communications
to the New Issuer shall be given as provided in Section 13.02 of the Indenture. 
 4. Ratification of Indenture;
Supplemental Indentures Part of Indenture. Except as expressly amended hereby, the Indenture is in all respects ratified and confirmed and all the terms, conditions and provisions thereof shall remain in full force and effect. This Supplemental
Indenture shall form a part of the Indenture for all purposes, and every holder of Notes heretofore or hereafter authenticated and delivered shall be bound hereby. 

 5. Release of Obligations of Escrow Issuer. Upon execution of this Supplemental
Indenture by the New Issuer, the Parent Guarantor and the Trustee, the Escrow Issuer is released and discharged from all obligations under the Indenture and the Notes. 
 6. Governing Law. THIS SUPPLEMENTAL INDENTURE SHALL BE GOVERNED BY, AND CONSTRUED IN ACCORDANCE WITH, THE LAWS OF THE STATE OF NEW YORK, WITHOUT REGARD TO PRINCIPLES OF CONFLICTS OF LAW.

 7. Trustee Makes No Representation. The Trustee makes no representation as to the validity or sufficiency of this
Supplemental Indenture. 
 8. Counterparts. The parties may sign any number of copies of this Supplemental Indenture.
Each signed copy shall be an original, but all of them together represent the same agreement. 
 9. Effect of Headings.
The Section headings herein are for convenience only and shall not effect the construction thereof. 

 IN WITNESS WHEREOF, the parties hereto have caused this Supplemental Indenture to be duly
executed as of the date first above written. 
  

					
	CAESARS ENTERTAINMENT OPERATING
COMPANY, INC.
		
	By:	  	 /s/ Jonathan S. Halkyard

		  	Name:	 	Jonathan S. Halkyard
		  	Title:	 	Executive Vice President &
		  		 	Chief Financial Officer

 [Signature page to Supplemental Indenture] 

 
					
	U.S. BANK NATIONAL ASSOCIATION,
	as Trustee
		
	By:	  	 /s/ Raymond S. Haverstock

		  	Name:	 	Raymond S. Haverstock
		  	Title:	 	Vice President

  

[Signature page to Supplemental Indenture] 

 Acknowledged by: 
 CAESARS OPERATING ESCROW LLC 
  

					
	By:	  	Caesars Entertainment Operating Company, Inc.,
		  	as sole member
		
	By:	  	 /s/ Jonathan S. Halkyard

		  	Name: Jonathan S. Halkyard
		  	Title: Executive Vice President & Chief Financial Officer
	
	CAESARS ESCROW CORPORATION
		
	By:	  	 /s/ Jonathan S. Halkyard

		  	Name: Jonathan S. Halkyard
		  	Title: Senior Vice President & Treasurer
	
	CAESARS ENTERTAINMENT CORPORATION
		
	By:	  	 /s/ Jonathan S. Halkyard

		  	Name: Jonathan S. Halkyard
		  	Title: Executive Vice President & Chief Financial Officer

  

[Signature page to Supplemental Indenture]Joinder to Registration Rights Agreement

 Exhibit 4.2 
 Registration Rights Agreement Joinder 
 March 1, 2012 

WHEREAS, Caesars Operating Escrow LLC (“Escrow LLC”), Caesars Escrow Corporation (“Escrow Corporation”
and, together with Escrow LLC, the “Issuers”), Caesars Entertainment Corporation (“Parent Guarantor”) and J.P. Morgan Securities LLC, as representative (the “Representative”) of the several Initial
Purchasers heretofore executed and delivered a Registration Rights Agreement (“Registration Rights Agreement”), dated February 14, 2012, providing for the registration of notes substantially similar to the Notes (as defined therein)
(capitalized terms used herein and not otherwise defined herein shall have the meanings ascribed to such terms in the Registration Rights Agreement); 
 WHEREAS, as a condition to the release of the proceeds from the sale of the Notes from escrow, Caesars Entertainment Operating Company, Inc. (the “Company”) has agreed to assume all
obligations of the Issuers under the Notes and the Indenture (as defined in the Registration Rights Agreement) and become the successor obligor of the Notes in all respects, pursuant to the CEOC Assumption (as defined in the Registration Rights
Agreement); and 
 WHEREAS, the Company has agreed to become party to the Registration Rights Agreement upon the consummation of
the CEOC Assumption. 
 NOW, THEREFORE, the Company hereby agrees for the benefit of the Initial Purchasers, as follows:

 1. Joinder. The Company hereby acknowledges that it has received and reviewed a copy of the Registration Rights
Agreement and all other documents it deems fit to enter into this joinder agreement (the “Registration Rights Agreement Joinder”), and acknowledges and agrees to (i) join and become a party to the Registration Rights Agreement
as indicated by its signature below; (ii) be bound by all covenants, agreements, representations, warranties, indemnities and acknowledgments attributable to the Company in the Registration Rights Agreement as if the Company was a party thereto
as of the date of the Registration Rights Agreement; and (iii) perform all obligations and duties required and be entitled to all the benefits of the Company pursuant to the Registration Rights Agreement. 

2. Representations and Warranties and Agreements of the Company. The Company hereby represents and warrants to and agrees with the
Initial Purchasers that it has all the requisite corporate power and authority to execute, deliver and perform its obligations under this Registration Rights Agreement Joinder and to consummate the transactions contemplated hereby and under the
Registration rights Agreement. 
 3. Release of Obligations of Escrow Issuers. Upon execution of this Registration Rights
Agreement Joinder by the Company and the Representatives and the joinder hereby of the Company to the Registration Rights Agreement, the Issuers are released and discharged from all obligations under the Registration Rights Agreement. 

 4. Counterparts. This Registration Rights Agreement Joinder may be signed in one or
more counterparts (which may be delivered in original form or via facsimile), each of which shall constitute an original when so executed and delivered and all of which together shall constitute one and the same agreement. 

5. Amendments. No amendment or waiver of any provision of this Registration Rights Agreement Joinder, nor any consent or approval
to any departure therefrom, shall in any event be effective unless the same shall be in writing and signed by the parties to the Registration Rights Agreement. 
 6. Headings. The section headings used herein are for convenience only and shall not affect the construction hereof. 
 7. APPLICABLE LAW. THE VALIDITY AND INTERPRETATION OF THIS JOINDER AGREEMENT, AND THE TERMS AND CONDITIONS SET FORTH HEREIN, SHALL BE GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE
STATE OF NEW YORK. 
 [Signature Pages Follow] 

 IN WITNESS WHEREOF, the undersigned has executed this agreement as of the date first above written.

  

					
	CAESARS ENTERTAINMENT OPERATING
COMPANY, INC.
		
	By:	 	 /s/ Jonathan S. Halkyard

		 	Name:	 	Jonathan S. Halkyard
		 	Title:	 	Senior Vice President and
		 		 	Chief Financial Officer

 The foregoing Registration Rights Agreement Joinder is hereby 

confirmed and accepted as of the date first above written. 
  

			
	J.P. MORGAN SECURITIES LLC
		
	By:	 	 /s/ Authorized Signatory

		 	 Name:

Title:

 For itself and as Representative of the other Initial Purchasers.

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