No person shall interfere with or obstruct in any way any law enforcement officer or other officer or employee of this city in the enforcement of the provisions of this title. The removal, obliteration or concealment of any chalk mark or other distinguishing mark used by any law enforcement officer or other employee or officer of this city in connection with the enforcement of the parking regulations of this title shall, if done for the purpose of evading the provisions of this title, constitute such interference or obstruction. (Ord. 622-89 § 1)