Whoever willfully destroys, defaces, or removes any sign
erected by an Indian tribe, or a Government agency
(1) to
indicate the boundary of an Indian reservation or of any Indian country as
defined in section 1151 of this title or
(2) to
give notice that hunting, trapping, or fishing is not permitted thereon without
lawful authority or permission, shall be fined under this title or imprisoned
not more than six months, or both.