No person shall, without lawful authority, attempt to or in fact alter, deface, injure, knock down or remove any official traffic-control device or any railroad sign or signal or any inscription, shield or insignia thereon, or any other part thereof.
[ 1965 ex.s. c 155 s 13.]
Notes:
Interference with traffic-control signals or railroad signs or signals: RCW 47.36.130.