Great Lakes Gas Transmission Limited Partner

Second Revised Volume No. 1

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

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

Superseding: First Revised Sheet No. 63C

RATE SCHEDULE MC

MARKET CENTER SERVICES

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(continued)

(E) Transporter shall only be obligated to park Gas or loan Gas for receipts or deliveries to

the extent Transporter solely determines that such actions are not detrimental to

Transporter's ability to satisfy any of its obligations to provide service under

Transporter's Transportation rate schedules or to meet system operational needs. Park and

Loan capacity shall be allocated first to nominations of the lowest quantity and then in

ascending order by the quantity requested. If the remaining capacity is insufficient to

satisfy nominations of equal quantity, the capacity will be allocated pro rata among the

nominations of equal quantity.

(F) Park and Loan Service shall be provided on an interruptible basis. Therefore,

Transporter may, at its sole discretion, interrupt or curtail the continuation of any or

all of the services hereunder. Interruption or curtailment of service includes, without

limitation, decreasing, suspending, or discontinuing the receipt and/or delivery of Gas.

Park and Loan Service shall be interrupted or curtailed in the manner necessary to provide

scheduled Transportation Service.

(G) Shipper shall tender its nomination to Transporter in accordance with Section 3 of the

General Terms and Conditions and Transporter shall allocate Park and Loan Service among

Shippers requesting such service pursuant to Subsection 2.1(E) above. However, Park and

Loan Service shall be scheduled and confirmed only after all other services offered by

Transporter on that Day, excluding Title Transfer Tracking Service, are scheduled and

confirmed.

(H) Shipper shall be responsible for the Transportation of Gas for or on behalf of Shipper to

or from a Market Center Point whether on to, off of, or across Transporter's pipeline

system. However, no Transportation shall be required to/from a physical point to/from its

corresponding Market Center Point.

(I) Notification from Transporter

(1) In the event that Transporter determines, in its sole discretion, that some or all

Park and Loan Services must be interrupted or curtailed, Transporter will notify any

affected Shippers receiving Park or Loan Service that they are required to eliminate

or reduce their existing parked and/or loaned balances. Such notice(s) shall first be

provided by telephone, and then by facsimile, by e-mail, or on Transporter's Web Site.

Transporter's notice shall specify the time frame within which parked balances must be

removed and/or loaned balances must be returned, consistent with Transporter's

operating conditions, but in no event shall the specified time frame be less than

three (3) Days from the date of Transporter's notification.

(2) In the event that Shipper does not remove parked Gas within the time frame specified

by Transporter, Shipper shall pay a penalty equal to the product of the quantity of

parked Gas which has not been removed and twice the price indicated for Canadian

Natural Gas Spot Export Prices as reported by Natural Gas Market Report for the

Emerson, MB/Noyes, MN Canadian export/U.S. entry point. The issue of this publication

shall be the most recent edition available at the time of invoicing. (Natural Gas

Market Report is published twice a month by Canadian Enerdata Ltd., Suite 500, 7030

Woodbine Ave., Markham, Ontario, Canada L3R 1A2.)