Editor's Note: Former subsections 20-19.1 through 20-19.7 and 20-19.12, 20-19.13, pertaining to the R-1, R-2, R-3, R-4, R-5, R-6, R-7, RA and P zone districts respectively, previously codified herein and containing portions of 1978 Code § 12-406 and Ordinance No. 12/4/85, were repealed in their entirety by Ordinance No. 97-13.