Great Lakes Gas Transmission Limited Partner

Second Revised Volume No. 1

Effective Date: 01/01/2001, Docket: RP99-466-004, Status: Effective

Second Revised Sheet No. 63D Second Revised Sheet No. 63D : Effective

Superseding: First Revised Sheet No. 63D

RATE SCHEDULE MC

MARKET CENTER SERVICES

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(continued)

(4) Failure by Shipper to comply with notice from Transporter to remove and/or return Gas

within the time frame specified may result in the termination of Shipper's MC Service

Agreement.

(5) If Shipper's inability to remove parked Gas or return loaned Gas within the time frame

specified by Transporter is due to Transporter's failure to schedule a nomination that

would allow Shipper to meet the deadline, the penalties described above shall be

suspended for those Days that Transporter does not schedule such nomination.

2.2 Title Transfer Tracking Service (TTTS)

(A) TTTS provides for the tracking by Transporter of the transfer of quantities of Gas at a

Market Center Point from any Shipper on Transporter's system to any other Shipper.

(B) The quantities of Gas nominated for transfer to other party(ies) must equal the

quantities nominated for acceptance by the other party(ies).

physical movement of Gas. In the event that a Shipper desires to move quantities of Gas

between Market Center Points, the Shipper must arrange such Transportation Service under

one of Transporter's rate schedules for Transportation Service.

(D) At no time shall Transporter be deemed to have taken title to Gas nominated for TTTS.

Title to Gas nominated for TTTS shall transfer directly from Shipper to the accepting party

and Transporter shall act only as a facilitator in the transfer of such title.

(E) Transporter reserves the right to suspend or terminate all TTTS under this Rate Schedule MC

to be effective on the first Day of the Month following notice of such suspension or

termination on Transporter's Web Site.

2.3 Any receipt or delivery Point on Transporter's system may be nominated as a Market Center Point.

3. GENERAL TERMS AND CONDITIONS

The General Terms and Conditions of this FERC Gas Tariff, Second Revised Volume No. 1, are

applicable and hereby made part of this rate schedule.