25 U.S. Code § 400 - Leases for mining purposes of reserved and unallotted lands in Fort Peck and Blackfeet Indian Reservations
Lands reserved for school and agency purposes and all other unallotted lands on the Fort Peck and Blackfeet Indian Reservations, in the State of Montana, reserved from allotment or other disposition, may be leased for mining purposes under regulations prescribed by the Secretary of the Interior.
Source(Sept. 20, 1922, ch. 347, 42 Stat. 857.)