Northern Border Pipeline Company
FERC Gas Tariff
First Revised Volume No. 1

Fifth Revised Sheet No. 207A
Superseding
Fourth Revised Sheet No. 207A

                         GENERAL TERMS AND CONDITIONS


  1.  DEFINITIONS (Continued)

        o   The term "Contract Dekatherm-miles" relative to a Shipper's 
            Rate Schedule T-1 or Rate Schedule T-1B Service shall mean the 
            number calculated by (a) multiplying Shipper's Maximum Receipt 
            Quantity by the number of miles of Company's pipeline, as 
            shown on Exhibit A to the Service Agreement, (b) converting 
            such product from (a) to Dekatherm-miles by multiplying by the 
            Posted Btu Factor, and (c) multiplying the product in (b) by 
            the number of days for a respective time period (i.e. monthly, 
            annually, or for the term of the Service Agreement).

Issued by: Raymond D. Neppl, Vice President
Issued on: November 21, 2006                  Effective on: January 1, 2007
Filed to comply with order of the Federal Energy Regulatory Commission, Docket 
No. RP06-72-000, issued November 21, 2006, 17 FERC ś 61,217