1955—Act Aug. 9, 1955, authorized Secretary of the Interior to lease allotted lands for mining purposes where the allottee is deceased and the heirs to or devisees of any interest in the allotment either have not been determined or cannot be located.

Pub. L. 106–462, title II, § 201, Nov. 7, 2000, 114 Stat. 2007, authorized the Secretary of the Interior to approve oil or gas leases affecting individually owned Navajo Indian allotted lands in certain circumstances and defined pertinent terms with respect to such leases.

Pub. L. 105–188, § 1, July 7, 1998, 112 Stat. 620, as amended by Pub. L. 106–67, § 1(2), Oct. 6, 1999, 113 Stat. 979, authorized Secretary of the Interior to approve any mineral lease or agreement that affects individually owned land located within Fort Berthold Indian Reservation in North Dakota or certain former Indian reservations located in Oklahoma upon consent of majority interest and best interest determination.