Lease Modification Form

OMB# 1076-0180

Expires XX-XXXX

MODIFICATION OF MINING LEASE

CONTRACT NO: APPROVED:

LESSOR: Osage Nation LESSEE:

Covering property described as: SW/4 of Section 30, Township 20 North, Range 12 East, Osage County, Oklahoma, containing 160 acres, more or less.

Now, therefore, the Gas Mining Lease is modified to include conventional Oil Mining Lease rights, pursuant to Osage Tribal Council Resolution 30-1235 and 25 CFR 226.

This modification does not change any of the terms, conditions, or stipulations except as specifically set forth herein,

Lessee Signature: [Insert] Date

Lessor Signature: Chairman, Osage Minerals Council Date

UNITED STATES DEPARTMENT OF THE INTERIOR

The modification is hereby approved and declared to be in accordance with the rules and regulations prescribed by the Secretary of the Interior, thereunder, and now in force, (25 CFR 226)

Superintendent, Osage Agency Date

Under the authority delegated by 200 DM 1, 209 DM 8, 230 DM 1, 3 IAM 4.1 and Muskogee Area

Addendum 9901 to 3 IAM 4 issued June 22, 1999.