Markwest New Mexico, L. L. C.

Second Revised Volume No. 1

Effective Date: 08/01/2009, Docket: RP09-750-001, Status: Effective

Substitute First Revised Sheet No. 155 Substitute First Revised Sheet No. 155

Superseding: First Revised Sheet No. 155

25. NORTH AMERICAN ENERGY STANDARDS BOARD (NAESB) STANDARDS

Transporter hereby incorporates into this Tariff by reference NAESB

Version 1.8 standards as required by the Commission in 18 CFR Part

284.12(a), in accordance with Order Nos. 587, et seq.:

0.2.1 through 0.2.3, 0.3.1 through 0.3.15, 1.1.22, 1.2.1 through 1.2.5,

1.2.8 through 1.2.11, 1.2.13 through 1.2.19, 1.3.2(vi), 1.3.3 through

1.3.9, 1.3.11, 1.3.13 through 1.3.77, 1.3.79, 1.4.1 through 1.4.7,

2.1.6, 2.2.1 through 2.2.5, 2.3.1 through 2.3.6, 2.3.8 through 2.3.13,

2.3.15, 2.3.17 through 2.3.23, 2.3.25, 2.3.27, 2.3.28 through 2.3.35,

2.3.42 through 2.3.44, 2.3.48, 2.3.50 through 2.3.65, 2.4.1 through

2.4.16, 3.3.1 through 3.3.14, 3.3.16 through 3.3.26, 3.4.1 through

3.4.4, 4.1.40, 4.2.1 through 4.2.20, 4.3.1 through 4.3.3, 4.3.5, 4.3.16

through 4.3.18, 4.3.20, 4.3.22 through 4.3.36, 4.3.38 through 4.3.62,

4.3.65 through 4.3.69, 4.3.72 through 4.3.76, 4.3.78 through 4.3.87,

4.3.89, 4.3.90 through 4.3.93, 5.1.2 through 5.1.4, 5.2.1, 5.2.2, 5.2.3,

5.3.2, 5.3.3, 5.3.7 through 5.3.10, 5.3.12, 5.3.17, 5.3.18, 5.3.20

through 5.3.60, 5.4.1 through 5.4.22, 10.2.1 through 10.3.1, and 10.3.3

through 10.3.25.

In addition, Transporter hereby incorporates into this Tariff by

reference the model Operational Balancing Agreement approved by NAESB as

Standards 6.5.2.

26. DEFAULTS AND REMEDIES

26.1 Events of Default - An "Event of Default" shall mean, with respect

to Shipper or Transporter, the occurrence of any of the following:

(a) any representation or warranty made in the Agreement by

Shipper or Transporter that proves to be false or misleading

in any material respect;

(b) the failure of Shipper or Transporter to perform any

covenant set forth in a Transportation Agreement, where such

failure is not excused by Force Majeure and is not cured

within thirty (30) Business Days after written notice

thereof to the other party; or