TransColorado Gas Transmission Company

Original Volume No. 1

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Effective Date: 07/01/2002, Docket: RP02-328-000, Status: Effective

Second Revised Sheet No. 412 Second Revised Sheet No. 412 : Superseded

Superseding: First Revised Sheet No. 412

TRADING PARTNER AGREEMENT

for the Electronic Data Interchange

of Information Over the Public Internet

Section 2. Transmissions.

2.1. Proper Receipt. Documents shall not be deemed to have been

properly received until accessible to the receiving party at such party's

Receipt Computer (designated in the Appendix by Uniform Resource Locator

("URL code")), as evidenced by the receipt of the sending party of the

hyper-text transfer protocol ("HTTP") response initiated by the receiving

party indicating successful receipt of the Document in accordance with

"NAESB" standards. No Document shall have any effect where an HTTP

response is not received by the sending party or where an HTTP response

has indicated that an error has occurred.

2.2. Verification.

2.2.1. Upon Proper Receipt of any Document, the receiving

party shall verify the legitimacy of the Document, process the decryption

of the Document as necessary, and translate the Document in accordance

with the Standards to determine whether the Document contains all of the

required data in proper syntactical form. If the Document is legitimate

and successfully decoded, the receiving party shall transmit either a

Functional Acknowledgment or a Response Document to the sending party by

the Acknowledgment Deadline, all as set forth in the Appendix. A

Functional Acknowledgment means an ASC X12 transaction set 997, which

confirms (in the format specified thereby) whether or not all required

portions of the Document are complete and syntactically correct, but which

does not address or otherwise confirm the substantive content of the

Document. A Response Document is a transaction set in substitution of the

ASC X12 Functional Acknowledgment transaction set 997. For purposes of

this Agreement, a Response Document confirms (in the format specified

thereby) whether or not the substantive content of the corresponding

Document contains data that is sufficiently accurate to effectuate the

communication, confirms whether or not all required portions of the

Document are complete and syntactically correct and may contain data sent

by the receiving party to the sending party in response to the substantive

content of the related Document.