To ensure that each building, structure and/or portion thereof has a number designation assigned and to be known as the address in relation to such building, structure and/or portion thereof as to the public or private street upon which the entrance is fronting, it shall be the duty of the city building official to assign and enforce as set forth in this chapter. (Ord. 6038 § 2, 2006; Ord. 5998 § 2, 2006; Ord. 2856 § 2, 1974; 1957 code § 2.15.010.)