§ 20-69 ALTERATION OR DESTRUCTION OF SIGNS.
   No person shall, without lawful authority, attempt to or in fact alter, deface, injure, knock down or remove any official traffic-control device, including any 911 emergency telephone service route markers, or any railroad sign or signal or any inscription, shield or insignia thereon, or any other part thereof.
(47 O.S. § 11-207) (`90 Code, § 20-29)