Document:

Second Supplemental Indenture (9-1/2% Senior Secured Notes)

 Exhibit 4.12(c) 
 SECOND SUPPLEMENTAL INDENTURE 
 dated as of June 30, 2006 
 among 
 LYONDELL CHEMICAL COMPANY, 

as Company 
 the SUBSIDIARY GUARANTORS party
hereto 
 and 
 THE BANK OF NEW
YORK, 
 as Trustee 
  

 9 1/2% Senior Secured Notes due 2008 

 THIS SECOND SUPPLEMENTAL INDENTURE (this “Supplemental Indenture”), entered into as of
June 30, 2006, among LYONDELL CHEMICAL COMPANY, a Delaware corporation (the “Company”), LRC HOLDINGS GP LLC, a Delaware limited liability company, LRC HOLDINGS LP LLC, a Delaware limited liability company, LRP HOLDINGS LP LLC,
a Delaware limited liability company, LYONDELL (PELICAN) PETROCHEMICAL L.P.1, INC., a Delaware corporation, LYONDELL CHEMICAL DELAWARE COMPANY, a Delaware corporation, LYONDELL CHEMICAL PROPERTIES, L.P., a Delaware limited partnership, LYONDELL
CHEMICAL TECHNOLOGY MANAGEMENT, INC., a Delaware corporation, LYONDELL CHIMIE FRANCE CORPORATION, a Delaware corporation, LYONDELL FRANCE, INC., a Delaware corporation, LYONDELL LP3 GP, LLC, a Delaware limited liability company, LYONDELL LP3
PARTNERS, LP, a Delaware limited partnership, LYONDELL LP4 INC., a Delaware corporation, LYONDELL PETROCHEMICAL L.P. INC., a Delaware corporation, LYONDELL REFINING COMPANY LP, a Delaware limited partnership, LYONDELL REFINING GP, LLC, a Delaware
limited liability company, LYONDELL REFINING LP, LLC, a Delaware limited liability company, LYONDELL REFINING PARTNERS, LP, a Delaware limited partnership, POSM DELAWARE, INC., a Delaware corporation, POSM II PROPERTIES PARTNERSHIP, L.P., a Delaware
limited partnership (each an “Undersigned”), and THE BANK OF NEW YORK, as trustee (the “Trustee”). 
 RECITALS 
 WHEREAS, the Company, the Subsidiary Guarantors party thereto and the Trustee entered into the Indenture, dated
as of December 4, 2001 (the “Indenture”), relating to the Company’s 9 1/2% Senior
Secured Notes due 2008 (the “Notes”); 
 WHEREAS, as a condition to the Trustee entering into the Indenture and the
purchase of the Notes by the Holders, the Company agreed, subject to certain exceptions, pursuant to Section 4.22 of the Indenture to cause any Restricted Subsidiary that has guaranteed or secured Indebtedness of the Company or any of its
Restricted Subsidiaries to provide Subsidiary Guarantees. 
 AGREEMENT 
 NOW, THEREFORE, in consideration of the premises and mutual covenants herein contained and intending to be legally bound, the parties hereto hereby agree
as follows: 
 Section 1. Capitalized terms used herein and not otherwise defined herein are used as defined in the Indenture.

 Section 2. Each Undersigned, by its execution of this Supplemental Indenture, agrees to be a Subsidiary Guarantor under the Indenture
and to be bound by the terms of the Indenture applicable to Subsidiary Guarantors, including, but not limited to, Article 13 thereof. 
 Section 3. This Supplemental Indenture shall be governed by and construed in accordance with the internal laws of the State of New York. 
  

 2 

 Section 4. This Supplemental Indenture may be signed in various counterparts which together shall
constitute one and the same instrument. 
 Section 5. This Supplemental Indenture is an amendment supplemental to the Indenture and said
Indenture and this Supplemental Indenture shall henceforth be read together. 
 [ Remainder of this page intentionally left
blank ] 
  

 3 

 IN WITNESS WHEREOF, the parties have duly executed and delivered this Supplemental Indenture or have
caused this Supplemental Indenture to be duly executed on their respective behalf by their respective officers thereunto duly authorized, as of the day and year first above written. 
  
  

			
	 LYONDELL CHEMICAL COMPANY, as
     Company

		
	By:	 	 /s/ Karen A. Twitchell

	Name:	 	Karen A. Twitchell
	Title:	 	Vice President and Treasurer

  

			
	 LRC HOLDINGS GP LLC, as Subsidiary
     Guarantor

		
	By:	 	 /s/ Francis P. McGrail

	Name:	 	Francis P. McGrail
	Title:	 	President and Treasurer

  

			
	 LRC HOLDINGS LP LLC, as Subsidiary
     Guarantor

		
	By:	 	 Lyondell Chemical Company,
 its sole
member

		
	By:	 	 /s/ Karen A. Twitchell

	Name:	 	Karen A. Twitchell
	Title:	 	Vice President and Treasurer

  

			
	 LRP HOLDINGS LP LLC, as Subsidiary
     Guarantor

		
	By:	 	 Lyondell Chemical Company, its
 sole
member

		
	By:	 	 /s/ Karen A. Twitchell

	Name:	 	Karen A. Twitchell
	Title:	 	Vice President and Treasurer

 Signature Page to Supplemental Indenture 

			
	 LYONDELL (PELICAN)
     PETROCHEMICAL L.P.1, INC., as
     Subsidiary Guarantor

		
	By:	 	 /s/ Karen A. Twitchell

	Name:	 	Karen A. Twitchell
	Title:	 	Vice President and Treasurer

  

			
	 LYONDELL CHEMICAL DELAWARE
     COMPANY, as Subsidiary
     Guarantor

		
	By:	 	 /s/ Francis P. McGrail

	Name:	 	Francis P. McGrail
	Title:	 	President and Treasurer

  

			
	 LYONDELL CHEMICAL
     PROPERTIES, L.P., as Subsidiary
     Guarantor

		
	By:	 	 Lyondell Chemical Technology
 Management, Inc., its
general
 partner

		
	By:	 	 /s/ Francis P. McGrail

	Name:	 	Francis P. McGrail
	Title:	 	President and Treasurer

  

			
	 LYONDELL CHEMICAL
     TECHNOLOGY MANAGEMENT,
     INC., as Subsidiary Guarantor

		
	By:	 	 /s/ Francis P. McGrail

	Name:	 	Francis P. McGrail
	Title:	 	President and Treasurer

 Signature Page to Supplemental Indenture 

			
	 LYONDELL CHIMIE FRANCE
     CORPORATION, as Subsidiary
     Guarantor

		
	By:	 	 /s/ Karen A. Twitchell

	Name:	 	Karen A. Twitchell
	Title:	 	Vice President and Treasurer

  

			
	 LYONDELL FRANCE, INC., as
     Subsidiary Guarantor

		
	By:	 	 /s/ Karen A. Twitchell

	Name:	 	Karen A. Twitchell
	Title:	 	Vice President and Treasurer

  

			
	 LYONDELL LP3 GP, LLC, as Subsidiary
     Guarantor

		
	By:	 	 /s/ Francis P. McGrail

	Name:	 	Francis P. McGrail
	Title:	 	President and Treasurer

  

			
	 LYONDELL LP3 PARTNERS, LP, as
     Subsidiary Guarantor

		
	By:	 	 Lyondell LP3 GP, LLC,
 its general
partner

		
	By:	 	 /s/ Francis P. McGrail

	Name:	 	Francis P. McGrail
	Title:	 	President and Treasurer

  

			
	 LYONDELL LP4 INC., as Subsidiary
     Guarantor

		
	By:	 	 /s/ Francis P. McGrail

	Name:	 	Francis P. McGrail
	Title:	 	Vice President and Assistant Treasurer

 Signature Page to Supplemental Indenture 

			
	 LYONDELL PETROCHEMICAL L.P.
     INC., as Subsidiary Guarantor

		
	By:	 	 /s/ Karen A. Twitchell

	Name:	 	Karen A. Twitchell
	Title:	 	Vice President and Treasurer

  

			
	 LYONDELL REFINING COMPANY
     LP, as Subsidiary Guarantor

		
	By:	 	 LRC Holdings GP LLC, its general
 partner

		
	By:	 	 /s/ Francis P. McGrail

	Name:	 	Francis P. McGrail
	Title:	 	President and Treasurer

  

			
	 LYONDELL REFINING GP, LLC, as
     Subsidiary Guarantor

		
	By:	 	 /s/ Francis P. McGrail

	Name:	 	Francis P. McGrail
	Title:	 	President and Treasurer

  

			
	 LYONDELL REFINING LP, LLC, as
     Subsidiary Guarantor

		
	By:	 	 /s/ Karen A. Twitchell

	Name:	 	Karen A. Twitchell
	Title:	 	Vice President and Treasurer

 Signature Page to Supplemental Indenture 

			
	 LYONDELL REFINING PARTNERS,
     LP, as Subsidiary Guarantor

		
	By:	 	 Lyondell Refining GP, LLC, its
 general
partner

		
	By:	 	 /s/ Francis P. McGrail

	Name:	 	Francis P. McGrail
	Title:	 	President and Treasurer

  

			
	 POSM DELAWARE, INC., as Subsidiary
     Guarantor

		
	By:	 	 /s/ Karen A. Twitchell

	Name:	 	Karen A. Twitchell
	Title:	 	Vice President and Treasurer

  

			
	 POSM II PROPERTIES PARTNERSHIP,
     L.P., as Subsidiary Guarantor

		
	By:	 	 Lyondell Chemical Company, its
 general
partner

		
	By:	 	 /s/ Karen A. Twitchell

	Name:	 	Karen A. Twitchell
	Title:	 	Vice President and Treasurer

 Signature Page to Supplemental Indenture 

			
	THE BANK OF NEW YORK, as Trustee
		
	By:	 	 /s/ Robert A. Massimillo

	Name:	 	Robert A. Massimillo
	Title:	 	Vice President

 Signature Page to Supplemental IndentureFirst Supplemental Indenture (11-1/8% Senior Secured Notes)

 Exhibit 4.13(b) 
 FIRST SUPPLEMENTAL INDENTURE 
 dated as of June 30, 2006 
 among 
 LYONDELL CHEMICAL COMPANY, 

as Company 
 the SUBSIDIARY GUARANTORS party
hereto 
 and 
 THE BANK OF NEW
YORK, 
 as Trustee 
  

 11 1/8% Senior Secured Notes due 2012 

 THIS FIRST SUPPLEMENTAL INDENTURE (this “Supplemental Indenture”), entered into as of
June 30, 2006, among LYONDELL CHEMICAL COMPANY, a Delaware corporation (the “Company”), LRC HOLDINGS GP LLC, a Delaware limited liability company, LRC HOLDINGS LP LLC, a Delaware limited liability company, LRP HOLDINGS LP LLC,
a Delaware limited liability company, LYONDELL (PELICAN) PETROCHEMICAL L.P.1, INC., a Delaware corporation, LYONDELL CHEMICAL DELAWARE COMPANY, a Delaware corporation, LYONDELL CHEMICAL PROPERTIES, L.P., a Delaware limited partnership, LYONDELL
CHEMICAL TECHNOLOGY MANAGEMENT, INC., a Delaware corporation, LYONDELL CHIMIE FRANCE CORPORATION, a Delaware corporation, LYONDELL FRANCE, INC., a Delaware corporation, LYONDELL LP3 GP, LLC, a Delaware limited liability company, LYONDELL LP3
PARTNERS, LP, a Delaware limited partnership, LYONDELL LP4 INC., a Delaware corporation, LYONDELL PETROCHEMICAL L.P. INC., a Delaware corporation, LYONDELL REFINING COMPANY LP, a Delaware limited partnership, LYONDELL REFINING GP, LLC, a Delaware
limited liability company, LYONDELL REFINING LP, LLC, a Delaware limited liability company, LYONDELL REFINING PARTNERS, LP, a Delaware limited partnership, POSM DELAWARE, INC., a Delaware corporation, POSM II PROPERTIES PARTNERSHIP, L.P., a Delaware
limited partnership (each an “Undersigned”), and THE BANK OF NEW YORK, as trustee (the “Trustee”). 
 RECITALS 
 WHEREAS, the Company, the Subsidiary Guarantors party thereto and the Trustee entered into the Indenture, dated
as of July 2, 2002 (the “Indenture”), relating to the Company’s 11 1/8% Senior Secured
Notes due 2012 (the “Notes”); 
 WHEREAS, as a condition to the Trustee entering into the Indenture and the purchase
of the Notes by the Holders, the Company agreed, subject to certain exceptions, pursuant to Section 4.22 of the Indenture to cause any Restricted Subsidiary that has guaranteed or secured Indebtedness of the Company or any of its Restricted
Subsidiaries to provide Subsidiary Guarantees. 
 AGREEMENT 
 NOW, THEREFORE, in consideration of the premises and mutual covenants herein contained and intending to be legally bound, the parties hereto hereby agree
as follows: 
 Section 1. Capitalized terms used herein and not otherwise defined herein are used as defined in the Indenture.

 Section 2. Each Undersigned, by its execution of this Supplemental Indenture, agrees to be a Subsidiary Guarantor under the Indenture
and to be bound by the terms of the Indenture applicable to Subsidiary Guarantors, including, but not limited to, Article 13 thereof. 
 Section 3. This Supplemental Indenture shall be governed by and construed in accordance with the internal laws of the State of New York. 

 Section 4. This Supplemental Indenture may be signed in various counterparts which together shall
constitute one and the same instrument. 
 Section 5. This Supplemental Indenture is an amendment supplemental to the Indenture and said
Indenture and this Supplemental Indenture shall henceforth be read together. 
 [ Remainder of this page intentionally left blank ]

 IN WITNESS WHEREOF, the parties have duly executed and delivered this Supplemental Indenture or have
caused this Supplemental Indenture to be duly executed on their respective behalf by their respective officers thereunto duly authorized, as of the day and year first above written. 
  

			
	 LYONDELL CHEMICAL COMPANY, as Company

		
	By:	 	 /s/ Karen A. Twitchell

	Name:	 	Karen A. Twitchell
	Title:	 	Vice President and Treasurer
	
	 LRC HOLDINGS GP LLC, as Subsidiary Guarantor

		
	By:	 	 /s/ Francis P. McGrail

	Name:	 	Francis P. McGrail
	Title:	 	President and Treasurer
	
	 LRC HOLDINGS LP LLC, as Subsidiary Guarantor

		
	By:	 	Lyondell Chemical Company, its sole member
		
	By:	 	 /s/ Karen A. Twitchell

	Name:	 	Karen A. Twitchell
	Title:	 	Vice President and Treasurer
	
	 LRP HOLDINGS LP LLC, as Subsidiary Guarantor

		
	By:	 	Lyondell Chemical Company, its sole member
		
	By:	 	 /s/ Karen A. Twitchell

	Name:	 	Karen A. Twitchell
	Title:	 	Vice President and Treasurer

 Signature Page to Supplemental Indenture 

			
	 LYONDELL (PELICAN) PETROCHEMICAL L.P.1, INC., as Subsidiary Guarantor

		
	By:	 	 /s/ Karen A. Twitchell

	Name:	 	Karen A. Twitchell
	Title:	 	Vice President and Treasurer
	
	 LYONDELL CHEMICAL DELAWARE COMPANY, as Subsidiary Guarantor

		
	By:	 	 /s/ Francis P. McGrail

	Name:	 	Francis P. McGrail
	Title:	 	President and Treasurer
	
	 LYONDELL CHEMICAL PROPERTIES, L.P., as Subsidiary Guarantor

		
	By:	 	Lyondell Chemical Technology Management, Inc., its general partner
		
	By:	 	 /s/ Francis P. McGrail

	Name:	 	Francis P. McGrail
	Title:	 	President and Treasurer
	
	 LYONDELL CHEMICAL TECHNOLOGY MANAGEMENT, INC., as Subsidiary Guarantor

		
	By:	 	 /s/ Francis P. McGrail

	Name:	 	Francis P. McGrail
	Title:	 	President and Treasurer

 Signature Page to Supplemental Indenture 

			
	 LYONDELL CHIMIE FRANCE CORPORATION, as Subsidiary Guarantor

		
	By:	 	 /s/ Karen A. Twitchell

	Name:	 	Karen A. Twitchell
	Title:	 	Vice President and Treasurer
	
	 LYONDELL FRANCE, INC., as Subsidiary Guarantor

		
	By:	 	 /s/ Karen A. Twitchell

	Name:	 	Karen A. Twitchell
	Title:	 	Vice President and Treasurer
	
	 LYONDELL LP3 GP, LLC, as Subsidiary Guarantor

		
	By:	 	 /s/ Francis P. McGrail

	Name:	 	Francis P. McGrail
	Title:	 	President and Treasurer
	
	 LYONDELL LP3 PARTNERS, LP, as Subsidiary Guarantor

		
	By:	 	Lyondell LP3 GP, LLC, its general partner
		
	By:	 	 /s/ Francis P. McGrail

	Name:	 	Francis P. McGrail
	Title:	 	President and Treasurer
	
	 LYONDELL LP4 INC., as Subsidiary Guarantor

		
	By:	 	 /s/ Francis P. McGrail

	Name:	 	Francis P. McGrail
	Title:	 	 Vice President and
 Assistant
Treasurer

 Signature Page to Supplemental Indenture 

			
	 LYONDELL PETROCHEMICAL L.P. INC., as Subsidiary Guarantor

		
	By:	 	 /s/ Karen A. Twitchell

	Name:	 	Karen A. Twitchell
	Title:	 	Vice President and Treasurer
	
	 LYONDELL REFINING COMPANY LP, as Subsidiary Guarantor

		
	By:	 	LRC Holdings GP LLC, its general partner
		
	By:	 	 /s/ Francis P. McGrail

	Name:	 	Francis P. McGrail
	Title:	 	President and Treasurer
	
	 LYONDELL REFINING GP, LLC, as Subsidiary Guarantor

		
	By:	 	 /s/ Francis P. McGrail

	Name:	 	Francis P. McGrail
	Title:	 	President and Treasurer
	
	 LYONDELL REFINING LP, LLC, as Subsidiary Guarantor

		
	By:	 	 /s/ Karen A. Twitchell

	Name:	 	Karen A. Twitchell
	Title:	 	Vice President and Treasurer

 Signature Page to Supplemental Indenture 

			
	 LYONDELL REFINING PARTNERS, LP, as Subsidiary Guarantor

		
	By:	 	Lyondell Refining GP, LLC, its general partner
		
	By:	 	 /s/ Francis P. McGrail

	Name:	 	Francis P. McGrail
	Title:	 	President and Treasurer
	
	POSM DELAWARE, INC., as Subsidiary Guarantor
		
	By:	 	 /s/ Karen A. Twitchell

	Name:	 	Karen A. Twitchell
	Title:	 	Vice President and Treasurer
	
	 POSM II PROPERTIES PARTNERSHIP, L.P., as Subsidiary Guarantor

		
	By:	 	Lyondell Chemical Company, its general partner
		
	By:	 	 /s/ Karen A. Twitchell

	Name:	 	Karen A. Twitchell
	Title:	 	Vice President and Treasurer

 Signature Page to Supplemental Indenture 

			
	
	THE BANK OF NEW YORK, as Trustee
		
	By:	 	/s/ Robert A. Massimillo
		 	 
	Name:	 	Robert A. Massimillo
	Title:	 	Vice President

 Signature Page to Supplemental Indenture

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