All signs, name plates and their supporting members that were rendered nonconforming by Ordinance No. 74-1, effective February 8, 1974, and Ordinance No. 75-80, effective August 9, 1976, shall be brought into compliance with the provisions of this title on or prior to February 8, 1977. All signs, name plates and their supporting members that are rendered nonconforming by amendments to this title enacted subsequent to August 9, 1976, shall be brought into compliance with the provisions of this title within three years of the effective date of any such amendments. (Prior gen. code § 8-62.11)