Southern Star Central Gas Pipeline, Inc.

Original Volume No. 1

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

Original Sheet No. 503 Original Sheet No. 503 : Effective

FORM OF

ELECTRONIC DATA INTERCHANGE

TRADING PARTNER AGREEMENT

2.2.4 A functional acknowledgment, or a response document that has

been designated in the Appendix as a substitute for a

functional acknowledgment shall constitute conclusive

evidence a Document has been properly received.

2.2.5. Except as to conditions governed under Section 2.4, in the

event the receiving party fails to promptly and properly

transmit a functional acknowledgment or response document in

return for a properly received Document, where required, the

originating party's records of the contents of the Document

shall control.

2.3 Acceptance. If acceptance of a Document is required by the Appendix,

any such Document which has been properly received shall not give rise

to any obligation unless and until the party initially transmitting such

Document has properly received in return an Acceptance Document (as

specified in the Appendix).

2.4 Garbled Transmissions. If any transmitted Document is received in an

unintelligible or garbled form, the receiving party shall promptly

notify the originating party (if identifiable from the received

Document) in a reasonable manner. In the absence of such a notice and

where a functional acknowledgment or response document has resulted, the

originating party's records of the contents of such Document shall

control.

2.5 Retransmissions. If the originating party of a Document has not

properly received a corresponding functional acknowledgment or response

document within the Retransmission Time frame indicated in the

Appendix, the originating party shall retransmit the document.