Great Lakes Gas Transmission Limited Partner

Second Revised Volume No. 1

Effective Date: 05/01/1998, Docket: RP98-156-000, Status: Effective

Original Sheet No. 63A Original Sheet No. 63A : Effective

RATE SCHEDULE MC

MARKET CENTER SERVICES

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1. AVAILABILITY

This rate schedule is available to any person, corporation, partnership or any other

party (hereinafter referred to as "Shipper") for Market Center Service by Great Lakes

Gas Transmission Limited Partnership (hereinafter referred to as "Transporter"), when:

(A) Transporter has determined that it has the capability to provide Park and/or Loan

Service pursuant to Subsection 2.1 of this rate schedule or has the capability to

provide Title Transfer Tracking Service pursuant to Subsection 2.2 of this rate

schedule; and

(B) Shipper and Transporter have executed a Market Center Service Agreement (MC Service

Agreement) in the form prescribed under this Rate Schedule MC of Transporter's FERC

Gas Tariff, Second Revised Volume No. 1, for Market Center Service under this rate

schedule.

2. APPLICABILITY AND CHARACTER OF SERVICE

The following services shall be provided under this rate schedule: