Southern Star Central Gas Pipeline, Inc.

Original Volume No. 1

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

Original Sheet No. 501 Original Sheet No. 501 : Effective

FORM OF

ELECTRONIC DATA INTERCHANGE

TRADING PARTNER AGREEMENT

1.2 Third Party Services Providers.

1.2.1. Documents will be transmitted electronically to each party

either, as specified in the Appendix, directly or through

any third party service provider ("Provider") with which

either party may contract. Either party may modify its

election to use, not use or change a Provider upon 30 days

written notice.

1.2.2. Each party shall be responsible for the costs of any

Provider with which it contracts, unless otherwise set forth

in the Appendix. Unless otherwise stated in the Appendix,

the sending party shall pay all costs to get its data to the

receiving party's Receipt Computer and the receiving party

shall pay all costs to retrieve the data.

1.3 System Operations. Each party, at its own expense, shall provide and

maintain the equipment, software, services and testing necessary to

effectively and reliably transmit and receive Documents. Any special

data retention requirements shall be set forth in the Appendix.

1.4 Security Procedures. Each party shall properly use those securities

procedures, including those specified in the Appendix, if any, which are

reasonably sufficient to ensure that all transmissions of Documents are

authorized and to protect its business records and data from improper

access.

1.5 Signatures. Each party shall adopt as its signature an electronic

identification consisting of symbol(s) or code(s) which are to be

affixed to or contained where required, in the Document transmitted by

such party ("Signature Code(s)"). Such Signature Code(s) shall be

specified in the Appendix. In such cases where a Signature Code(s) is

required for one or more Transaction Set(s), the requirement shall be

specified in the Appendix applicable to such Transaction Set(s). Each

party agrees that the Signature Code(s) of such party affixed to or

contained in any transmitted Document shall be sufficient to verify such

party originated such Document(s). Neither party shall disclose to any

unauthorized person the Signature Code(s) of the other party.