NATIONAL PARK PASSPORT PROGRAM.

SEC. 602. [16 U.S.C. 5992] NATIONAL PARK PASSPORT PROGRAM. (a) Program.—The Secretary shall establish a national park passport program. A national park passport shall include a collectible stamp providing the holder admission to all units of the National Park System. (b) Effective Period.—A national park passport stamp shall be effective for a period of 12 months from the date of purchase. (c) Transferability.—A national park passport and stamp shall not be transferable.