Northern Border Pipeline Company

First Revised Volume No. 1

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Effective Date: 02/01/2009, Docket: RP09-132-000, Status: Effective

Eighth Revised Sheet No. 251 Eighth Revised Sheet No. 251

Superseding: Seventh Revised Sheet No. 251

GENERAL TERMS AND CONDITIONS

10. NOMINATIONS/CONFIRMATIONS/SCHEDULING/INTERRUPTION OF SERVICE

(Continued)

10.4 Capacity Allocation and Confirmation Process (Continued)

10.43 Allocation of Compression Service Capacity

In those instances, in which the aggregate quantity

of all validated nominations exceed the physical

capacity of a compressor station rendering service

under a specific compression rate schedule set forth

in Company's Tariff, Company will allocate capacity

to the validated nominations at the constrained

compressor in the following order:

(a) Firm Nominations

Pro rata allocation of capacity within this

nomination class, if necessary, shall be based

upon Shipper's Maximum Receipt Quantity at such

compressor station as set forth in Exhibit A of

the applicable compression service agreement.

(b) Interruptible Nominations

If required, Company shall prioritize

nominations within the nomination class on the

basis that the Shipper paying the higher

interruptible compression rate shall receive a

higher queue position than those paying a lower

interruptible compression rate.

Pro rata allocation of capacity within this

nomination class for two or more Shippers at an

equal rate, if necessary, will be based on

Shipper's validated nominated quantity.