High Island Offshore System, L.L.C.

Third Revised Volume No. 1

Effective Date: 10/01/2009, Docket: RP09-487-001, Status: Effective

Substitute Fourth Revised Sheet No. 55 Substitute Fourth Revised Sheet No. 55

Superseding: Third Revised Sheet No. 55

RATE SCHEDULE IT

INTERRUPTIBLE TRANSPORTATION SERVICE

(Continued)

4.4 Unauthorized Overrun. HIOS shall notify Shipper verbally of any

unauthorized overrun service that is occurring for Shipper, and shall

immediately confirm such notification by facsimile or similar means.

If such unauthorized service occurs on a Critical Day, Shipper shall

pay HIOS a penalty of $2.00 per Dth or the current Spot Market Price

for the offshore Texas region as reported in "Natural Gas Week",

whichever is higher, for any unauthorized daily overrun not terminated

within 24 hours of HIOS' notification. Such penalty payments shall be

paid to HIOS in addition to the charges otherwise payable by Shipper

under this or the appropriate Rate Schedule. HIOS shall credit to non-

offending Shippers all unauthorized overrun penalty revenues received

under this section in accordance with Section 27 of the General Terms

and Conditions of this Tariff. HIOS may waive, in whole or in part,

any overrun penalty provided for herein if in HIOS' sole discretion,

such penalty was incurred due to circumstances beyond Shipper's

control.

4.5 Transportation of Associated Liquids. If Associated Liquids are

transported hereunder for Shipper and HIOS is required by any regulatory

agency, from time to time, to allocate a portion of its cost of service

to such transportation service or to charge, or impute, a fee for such

service, then Shipper shall reimburse HIOS for such allocated costs and

such fee.

4.6 Commission and Other Regulatory Fees. Shipper shall reimburse HIOS for

all filing, reporting and application fees required by the Commission or

any other regulatory body which are related to service provided under

this Rate Schedule.

4.7 Rate Changes. Subject to any rights or limitations imposed by additional

Transportation Agreement provisions agreed to by Shipper and Transporter,

Transporter may from time to time and at any time selectively adjust any

or all of the rates charged to any individual Shipper for which a Maximum

Rate and Minimum Rate are stated on Sheet No. 10 of this Tariff;

provided, however, that such adjusted rate(s) shall not exceed the

applicable Maximum Rate(s), nor shall they be less than Minimum Rate(s),

set forth on such sheets. Transporter shall have the right to charge the

Maximum Rate at any time as a condition for new service or for