Northern Border Pipeline Company

First Revised Volume No. 1

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Effective Date: 11/01/2003, Docket: RP00-403-002, Status: Effective

Third Revised Sheet No. 177 Third Revised Sheet No. 177 : Superseded

Superseding: Second Revised Sheet No. 177

RATE SCHEDULE T-1B

FIRM BACKHAUL SERVICE

1. AVAILABILITY

1.1 Availability of Service

This Rate Schedule is available to any Person (hereinafter

called Shipper) desiring the transportation of natural gas

on a firm Backhaul basis after the satisfaction of the

credit worthiness provisions under Section 41 of the

General Terms and Conditions and the execution of a T-1B

Service Agreement with Company under this Rate Schedule.

1.2 Limitation on Availability of Service

1.21 Existing Facilities

Company shall not be required to provide service

under this Rate Schedule that would require Company

to construct or acquire any new facilities.

1.22 Prerequisite to Forwardhaul Service

Forwardhaul transportation service in which the

nominated Point of Receipt milepost on Company's

system is less than the corresponding nominated Point

of Delivery milepost, shall be permitted under Rate

Schedule T-1B on a secondary basis to the extent

Company has capacity available.

1.23 Prerequisite to Backhaul Service

Backhaul transportation service under Rate

Schedule T-1B shall only be available to the extent

that firm service Forwardhaul volumes are received

into Company's system on the same Gas Day upstream

of or at the nominated Point of Delivery and are

required to be delivered out of Company's system

downstream of or at the designated Point of Receipt

such that the firm Backhaul service can be provided.

Backhaul transportation service under Rate Schedule

T-1B shall only be available to the extent that the

volumes transported do not exceed the physical

capacity at such Points of Receipt and Delivery.

The use of a physical Point of Receipt as a nominated

Point of Delivery and a physical Point of Delivery