Williston Basin Interstate Pipeline Co.

Second Revised Volume No. 1

Effective Date: 05/14/2010, Docket: RP10-602-000, Status: Effective

Ninth Revised Sheet No. 228 Ninth Revised Sheet No. 228

Superseding: Eighth Revised Sheet No. 228

GENERAL TERMS AND CONDITIONS (Continued)

9. NOMINATION AND SCHEDULING PROCEDURES (Continued)

9.15 Revisions to Interruptible Service Agreements and Priority of

Service: Revisions to interruptible Service Agreements consisting of

changes in point(s) of receipt or point(s) of delivery, or which

increase the maximum quantities of service available, shall be afforded

a new priority of service for such revisions in accordance with

Subsection 9.20 or 9.22, as applicable. Increasing the maximum service

quantities or changing the point(s) of receipt or point(s) of delivery

in a Service Agreement shall not affect the priority of service

associated with those transactions which were included in the pre-

existing Service Agreement. Revisions to Service Agreements consisting

of term extensions shall not affect Shipper's priority of service.

9.16 Nominations for transportation service under Rate Schedule FT-1

submitted in accordance with Subsection 9.2 or 9.3 shall receive

scheduling priority over interruptible transportation service previously

scheduled; however, such nominations shall not receive scheduling

priority over firm transportation service previously scheduled.

9.17 Nominations for transportation service under Rate Schedule IT-1

submitted in accordance with Subsection 9.2, 9.3 or 9.4 shall not

receive scheduling priority over interruptible transportation service

previously scheduled.

9.18 Nominations for storage service under Rate Schedule FS-1

submitted in accordance with Subsection 9.2 or 9.3 shall receive

scheduling priority over interruptible storage service previously

scheduled; however, such nominations shall not receive scheduling

priority over firm storage service previously scheduled.

9.19 Nominations for storage service under Rate Schedule IS-1

submitted in accordance with Subsection 9.2, 9.3 or 9.4 shall not

receive scheduling priority over interruptible storage service

previously scheduled.

9.20 Within each of the nomination cycles defined in Subsections 9.1,

9.2, 9.3 or 9.4, the following scheduling priority listing (in

descending order of priority) shall prevail for transportation services

rendered pursuant to Transporter's FERC Gas Tariff, Second Revised

Volume No. 1: