Prior history: Zoning Code, Ch. 91, §§ 9101—9112, 9120—9135, 9140—9148, 9160—9171, 9180—9184, 9200—9207, 9210—9213, 9220, 9250, 9251, 9270—9272, 9280—9283, 9290—9297 and 9300—9309, as amended by Ord. No. 88-58, §§ 8—11, adopted Oct. 19, 1988 and Ord. No. 90-52, § 1, adopted Sept. 19, 1990.