Mississippi Canyon Gas Pipeline, LLC

First Revised Volume No. 1

Effective Date: 03/01/2009, Docket: RP09-329-000, Status: Effective

Fourth Revised Sheet No. 139B Fourth Revised Sheet No. 139B

Superseding: Third Revised Sheet No. 139B

GENERAL TERMS AND CONDITIONS

19. SHIPPERS RELEASE OF FIRM CAPACITY con't

19.9 Timeline for Capacity Releases (cont'd)

Intraday 2 Cycle

- posting of prearranged deals not subject to bid are

due by 4:00 P.M.;

- contract issued within one hour of award posting

(with a new contract number, when applicable);

nomination possible beginning at the next available

nomination cycle for the effective date of the

contract. (Central Clock Time)

19.10 Release of Firm Capacity at Rates in Excess of the Maximum Rate

Releases of Firm capacity pursuant to this Section can occur at

rates in excess of the maximum rates reflected on Sheet No. 6 if

the duration of the release is one year or less.

19.11 Releases on a Non-Business Day

Non-biddable releases on non-Business Days: The Releasing Shipper

and the Replacement Shipper must telephonically notify

Transporter's Gas Control Center (1-877-548-1800) at least two

hours before the initial nomination.

Posting of the prearranged deal and contract issuance will occur

by 9:00 A.M. on the following Business Day.