Midwestern Gas Transmission Company

SECOND REVISED VOLUME NO. 1

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Effective Date: 06/01/1997, Docket: RP97- 59-003, Status: Effective

Original Sheet No. 229 Original Sheet No. 229 : Superseded

ELECTRONIC DATA INTERCHANGE

TRADING PARTNER AGREEMENT (Continued)

"EDM Site" is the business unit responsible for sending and receiving all EDI

Transactions to a party.

"Emergency Notice" is defined in Section 2.4.1.

"Emergency Situations" is defined in Section 2.4.1.

"Functional Acknowledgment" is defined in Section 3.2.2.

"GISB Standards" means those Gas Industry Standards Board proposed industry

commercial standards in the form promulgated as regulatory requirements by the Federal

Energy Regulatory Commission ("FERC") from time to time.

"ISA Identifier" is defined as exchanging parties identifiers.

"Provider" is defined in Section 2.2.1.

"Receipt Computer" is the computer in one party's control which receives

information or data transmitted by the other party.

"Response Document" is defined in Section 3.2.3.

"Retransmission Timeframe" is defined in the Appendix.

"Signature Code(s)" is defined in Section 2.5.

"Signed Documents" is defined in Section 5.3.2.

"TGPC" is defined in the recitals above.

"Third Party Services" is defined in the recitals above.

"Trading Partner" is defined in the recitals above.

"Transactions" is defined in the recitals above.

Section 2. Prerequisites.

2.1. Documents: Standard. Each party may electronically transmit to, or receive

from, the other party any of the transaction sets ("Transaction Sets") listed in the

Exhibit(s) of the Appendix, together with Transaction Sets that the parties may by

written agreement add to the Appendix (collectively "Documents"). Any transmission of

data which is not a Document shall have no force or effect between the parties unless

justifiably relied upon by the receiving party. All documents shall be transmitted in

accordance with the standards and published industry guidelines set forth in the

Appendix. The Appendix to this Agreement is attached hereto and made a part hereof; the

Appendix and Exhibit(s) thereto hereafter are referred to as the "Appendix". In the

event of a conflict between the provisions in the body of this Agreement and the

Appendix, the Appendix will govern.

2.2. Third Party Service Providers.

2.2.1. Documents will be transmitted electronically to each party, as

specified in the Appendix, either directly or through a third party service provider

("Provider") with whom either party may contract. Either party may modify its election

to use, not use or change a Provider upon 30 days prior written notice.

2.2.2. 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 deliver its data to the

receiving party's Receipt Computer and the receiving party shall pay all costs to

retrieve the data.