El Paso Natural Gas Company

Second Revised Volume No. 1A

Effective Date: 04/01/2010, Docket: RP10-454-001, Status: Effective

Second Revised Sheet No. 271A Second Revised Sheet No. 271A

Superseding: Substitute First Revised Sheet No. 271A

TRANSPORTATION GENERAL TERMS AND CONDITIONS

(Continued)

8. OPERATING PROVISIONS

8.1 FIRM SERVICE (Continued)

(i) Hourly Entitlement Enhancement Nomination (Continued)

(iii) (A) Automatic Scheduling Adjustments to HEEN (Continued)

2. The sum of Shipper's HEEN and Flowing Gas nominations

shall not exceed the Shipper's Path Quantity for the

TSA nominated.

(B) Subject to the following requirements, and upon Shipper's

election, Transporter shall automatically increase

Shipper's HEEN nomination when such Shipper's Flowing Gas

nomination is decreased. The HEEN quantity increase shall

be commensurate with the Flowing Gas quantity decrease.

1. Shipper may elect the automatic HEEN increase feature

by notifying Transporter in writing a minimum of two

Business Days prior to the effective Gas Day. Such

election will remain in effect until changed by

Shipper.

2. The Shipper's HEEN and Flowing Gas nominations for the

same TSA, Flow Path and Delivery Point were scheduled

in a prior cycle.

3. The sum of the Shipper's HEEN and Flowing Gas

nominations shall not exceed such Shipper's Path

Quantity for the TSA nominated.

4. Transporter shall increase a Shipper's HEEN if the

Shipper's Flowing Gas nomination is decreased due to a

supply reduction. Transporter shall not increase a

Shipper's HEEN if such Shipper's Flowing Gas

nomination is decreased due to a constraint.

priority and bumping rules of Section 6.1(a) of the GT&C.

An automatic adjustment will not require previously

scheduled quantities in an earlier nomination cycle to be

rescheduled in a later cycle.

(D) Transporter may refuse to perform any automatic HEEN

adjustment if it believes that the adjustment would impair

system operations or service to another firm shipper.