36 CFR § 261.23 - Wild free-roaming horses and burros.
The following are prohibited:
(a) Removing or attempting to remove a wild free-roaming horse or burro from the National Forest System unless authorized by law or regulation.
(b) Causing or allowing the inhumane treatment or harassment of a wild free-roaming horse or burro.
(c) Removing or attempting to remove, alter or destroy any official mark used to identify a wild horse or burro or its remains unless authorized or permitted by law or regulation.
(d) Violating any terms or conditions specified in a care and maintenance agreement or permit.