43 CFR § 423.25
Vandalism, tampering, and theft
June 11, 2020
(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.