In all districts with the exception of R-1, R-2, and R-M2 residential districts, more than one structure housing a permitted or permissible principal use may be erected on a single lot of record, provided that yard and other requirements of this ordinance shall be met for each structure as though it were on an individual lot, and further provided that the owner of a single lot of record shall not sell or convey off a part of said lot of record without compliance with Chapter 159 of the Revised Code of Ordinances of the City of Mt. Vernon, relating to subdivision of land.
(Prior Code, Art. 21, § 21-109.4)