Code of Federal Regulations Title 43. Public Lands:  Interior § 43.3825.0–3 Authority

(a) The Act of June 18, 1934 (48 Stat. 984;  25 U.S.C. 461–479), as amended by the Act of August 28, 1937 (50 Stat. 862;  25 U.S.C. 463), revokes departmental order of October 28, 1932, which temporarily withdrew from all forms of mineral entry or claim the lands within the Tohono O'Odham Indian Reservation and restores, as of June 18, 1934, such lands to exploration, location and purchase under the existing mining laws of the United States.

(b) The regulations in this part apply to entries made prior to May 27, 1955. By virtue of the Act of May 27, 1955 (69 Stat. 67;  25 U.S.C. 463) mineral entries may no longer be made within the Tohono O'Odham Indian Reservation.