43 C.F.R. § 423.25 Vandalism, tampering, and theft.
Title 43 - Public Lands: Interior
(a) You must not tamper or attempt to tamper with, move, manipulate, operate, adjust, or set in motion property not under your lawful control or possession including, but not limited to, vehicles, equipment, controls, recreational facilities, and devices. (b) You must not destroy, injure, deface, damage, or unlawfully remove property not under your lawful control or possession. (c) You must not drop, place, throw, or roll rocks or other items inside, into, down, or from, dams, spillways, dikes, or other structures and facilities.
Title 43: Public Lands: Interior
PART 423—PUBLIC CONDUCT ON BUREAU OF RECLAMATION FACILITIES, LANDS, AND WATERBODIES
Subpart C—Rules of Conduct
§ 423.25 Vandalism, tampering, and theft.