Northern Border Pipeline Company

First Revised Volume No. 1

Effective Date: 01/16/2008, Docket: RP08-128-000, Status: Effective

Sixth Revised Sheet No. 268 Sixth Revised Sheet No. 268 : Effective

Superseding: Fifth Revised Sheet No. 268

GENERAL TERMS AND CONDITIONS

21. DEFAULTS

No default in the performance of any of the obligations of Company

or Shipper under this Tariff or Shipper's Agreement, nor any

action, non-action, concession or indulgence by Company or Shipper

shall operate to terminate, cancel, repudiate or surrender this

Tariff or Shipper's Agreement, or except as specifically provided

in such Agreement, to relieve Company or such Shipper from due and

punctual compliance with its obligations thereunder.

22. FORM OF SERVICE AGREEMENTS

Company shall not be obliged to enter into an Agreement with any

Person in a form other than the form of Agreement forming part of

the Tariff.

23. FLOWING GAS

Company and its trading partners shall accept all standard data

elements as specified by NAESB WGQ and adopted by FERC. Such data

elements and their usage are detailed in Section 35 of the General

Terms and Conditions.

23.1 Pre-Determined Allocations (PDA)/Quick Response

Natural gas is allocated among producers, operators,

transporters, shippers, and others after gas flows, using

various methodologies to allocate actual quantities. In

order to manage the impact of actual quantities variance

from scheduled quantities, the specification of the method

to be used in allocating actual quantities prior to gas

flow is imperative. PDAs accomplish this goal, by securing

the agreement of the allocating -- and the allocated --

parties as to the method to be used for computing the

allocation, relating scheduled quantities to actual

physical flow. The implementation of a PDA clarifies all

parties' expectations and responsibilities prior to gas

flow.