25 C.F.R. § 226.12 Government reserves right to purchase oil.
Title 25 - Indians
Any of the executive departments of the U.S. Government shall have the option to purchase all or any part of the oil produced from any lease at not less than the highest posted price as defined in §226.11.
Title 25: Indians
PART 226—LEASING OF OSAGE RESERVATION LANDS FOR OIL AND GAS MINING
Leasing Procedure, Rental and Royalty
§ 226.12 Government reserves right to purchase oil.