Midwestern Gas Transmission Company

SECOND REVISED VOLUME NO. 1

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Effective Date: 06/01/1997, Docket: RP97- 59-005, Status: Effective

Substitute Original Sheet No. 243 Substitute Original Sheet No. 243 : Superseded

Superseding: Original Sheet No. 243

EXHIBIT________(Sequential Number)

ELECTRONIC DATA INTERCHANGE TRADING PARTNER AGREEMENT

DATED__________________________

TO BE EFFECTIVE___________________________(Date)

Mark Transaction Set Number ANSI Your Document Document Application

Transactions and Name Version Company ID to be ID to be Response

Sets as Sender Included Included Transaction

Corresponding (S) or in GS02 in GS03 Set Number

to Exhibit Receiver (R) (R) (S)

850 Shipper to Transporter 3040 S 850NM

Nomination

855 Nomination Quick Response 3040 R 855NM

865 Scheduled Quantity 3040 R 865SQ

850 Request for Confirmation 3040 R 850CR

855 Confirmation Response 3040 S 855CR

860 Pre-determined Allocation 3040 S 860PA

865 Pre-determined Allocation 3040 R 865PA

Quick Response

811 Shipper Imbalance 3040 R 811SI

865 Allocation Statement 3040 R 865AS

867 Measurement Information Statement 3040 R 867MI

811 Transportation/Sales Invoice 3040 R 811IV

820 Payment Remittance 3040 S 820PR

822 Statement of Account 3040 R 822SA

840 Firm Transportation 3040 R 840OF

and Storage-Offer

843 Firm Transportation Storage- 3040 R 843BR

Bid Review

843 Firm Transportation and 3040 R 843AN

Storage-Award Notice

843 Firm Transportation and 3040 R 843WD

Storage-Withdrawal

840 Electronic Withdrawal Upload 3040 S 840WD

840 Operationally Available and 3040 R 840OA

Unsubscribed Capacity

846 Upload of Request for Download 3040 S 846RD

846 Response to Upload of Request 3040 R 846DR

for Download

864 System Wide Notices 3040 R 864SN

864 Notes/Special Instructions - 3040 R 864SI

Outbound

864 Notes/Special Instructions - 3040 S 864NI

Inbound

840 Upload to Pipeline of 3040 S 840PD

Prearranged Deal (UPPD)

843 UPPD - Validation 3040 R 843PD

843 UPPD - Bidder Confirmation 3040 S 843BC

824 UPPD - Bidder Confirmation 3040 R 824BV

Validation

567 UPPD - Final Disposition 3040 R 567FD

A functional Acknowledgement (Transaction Set 997) is required for each transaction set.

* The version of the Transaction Set shall be as approved by FERC, and as changed by FERC

from time to time.

TRADING PARTNER

COMPANY NAME: __________________________________ COMPANY NAME: __________________________________

BY: ____________________________________________ BY: ____________________________________________

NAME: __________________________________________ NAME: __________________________________________

TITLE: _________________________________________ TITLE: _________________________________________

on behalf of Tennessee Gas Pipeline,

Midwestern Gas Transmission, and

East Tennessee Natural Gas.