Northern Border Pipeline Company

First Revised Volume No. 1

Effective Date: 11/01/2003, Docket: RP03-629-000, Status: Effective

Second Revised Sheet No. 178 Second Revised Sheet No. 178 : Effective

Superseding: First Revised Sheet No. 178

RATE SCHEDULE T-1B

FIRM BACKHAUL SERVICE

1. AVAILABILITY (Continued)

1.2 Limitation on Availability of Service (Continued)

1.23 Prerequisite to Backhaul Service (Continued)

as a nominated Point of Receipt is permitted under

this Rate Schedule. However, Company provides no

guarantee that it will be able to confirm and

schedule nominations under a T-1B Agreement that

request the receipt and/or delivery of gas by

displacement.

2. APPLICABILITY AND CHARACTER OF SERVICE

2.1 Applicability

This Rate Schedule shall apply to firm Backhaul

transportation service after the Billing Commencement Date,

whether or not gas is actually transported, under a

Shipper's T-1B Transportation Agreement, other than service

specifically provided for in another Rate Schedule.

2.2 Excess Receipts

Shipper may not nominate transportation in excess of

Shipper's Maximum Receipt Quantity; however if quantities of

gas are transported in excess of Shipper's Maximum Receipt

Quantity as specified in Shipper's T-1B Transportation

Agreement, such shall be scheduled, received, and delivered

on an interruptible basis. For such excess receipts,

Shipper shall pay the Maximum Commodity Rate pursuant to

Rate Schedule IT-1.