Code of Federal Regulations Title 43. Public Lands:  Interior § 43.3900.10 Lands subject to leasing

(a) Those lands specifically excluded from leasing by the Act;

(b) Lands within the boundaries of any unit of the National Park System, except as expressly authorized by law (Glen Canyon National Recreation Area, Lake Mead National Recreation Area, and the Whiskeytown Unit of the Whiskeytown–Shasta–Trinity National Recreation Area);

(c) Lands within incorporated cities, towns and villages;  and

(d) Any other lands withdrawn from leasing.