Transcolorado Gas Transmission Company LLC

Second Revised Volume No. 1

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Effective Date: 12/28/2007, Docket: RP08-167-000, Status: Effective

Original Sheet No. 412 Original Sheet No. 412 : Effective

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.