(A) 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.
(B) Every person who is convicted of a violation of this section shall be guilty of a Class A misdemeanor, punishable by a fine of at least $250 in addition to any other penalty which may be imposed.
(ILCS Ch. 625, Act 5, § 11-311)