Southern Star Central Gas Pipeline, Inc.

Original Volume No. 1

Effective Date: 05/01/2003, Docket: RP03-352-000, Status: Effective

Original Sheet No. 511 Original Sheet No. 511 : Effective

APPENDIX

ELECTRONIC DATA INTERCHANGE TRADING PARTNER AGREEMENT

LIST OF EXHIBITS

EXHIBIT TRANSACTION TRANSACTION DATE EXHIBIT

NUMBER SET NUMBER SET IDENTIFIER DOCUMENT NAME ENTERED INTO

_______ ___________ ______________ _____________ ____________

________________________________________________________________________

All Exhibits attached hereto are to be considered attached to the Appendix and

made a part thereof. Where there are any provisions specified both in the

Exhibit(s) and in the Appendix, those contained in the Exhibit(s) govern.

The undersigned do hereby execute this Appendix, which Appendix is attached to

and made a part of the above referenced Trading Partner Agreement. By

execution below, the parties hereby ratify said Agreement set forth in this

Appendix and the attached Exhibit(s).

Company Name: ______________________ Company Name: __________________

By: ______________________ By: __________________

Printed Name: ______________________ Printed Name: __________________

Title: ______________________ Title: __________________