The owner or occupant of any residence, building, structure or place of business, excepting sheds and accessory buildings, opening upon or having access to a street within the city shall place and maintain the proper and clearly visible address numbers in a conspicuous location upon the main entrance or at the principal place of ingress to such residence, building, structure or place of business. The knowing failure to place and maintain the proper clearly visible address numbers in such a location shall constitute a misdemeanor. (Ord. 514 §2, 1978; Ord. 159 §8, 1970).