Northern Border Pipeline Company

First Revised Volume No. 1

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Effective Date: 09/08/2008, Docket: RP08-489-000, Status: Effective

Twentieth Revised Sheet No. 157 Twentieth Revised Sheet No. 157

Superseding: Nineteenth Revised Sheet No. 157

RATE SCHEDULE IT-1

INTERRUPTIBLE TRANSPORTATION SERVICE

3. RATES AND PAYMENT (Continued)

3.2 Discounted Rates

Company shall charge the applicable Maximum Commodity Rate

set forth on the Statement of Rates unless Company, from time

to time and at any time at its discretion on a

non-discriminatory basis, charges any individual Shipper for

transportation service under this Rate Schedule a rate which

is lower than such Maximum Commodity Rate; provided, however,

that such commodity rate charged may not be less than the

Minimum Commodity Rate set forth on the currently effective

Statement of Rates of Company's FERC Gas Tariff plus the

effective Annual Charge Adjustment and the Compressor Usage

Surcharge.

3.3 Negotiated Rates

Notwithstanding the foregoing provisions of this Section 3,

Company and Shipper may mutually agree to Negotiated Rates

for service hereunder as provided in Section 38 of the

General Terms and Conditions. The ACA surcharge and the

Compressor Usage Surcharge pursuant to Subsection 3.1 will

be applied to Shippers paying Negotiated Rates in the same

manner as they are applied to Shippers paying Recourse

Rates.