16 U.S.C. § 5992
Section 5992 · National park passport program
Amended 1 time on record
(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.