Any vacant lot that does not conform to one or more of the lot size (area, dimensions) requirements of the district in which it is located may be used for any use permitted in the district if such vacant lot:
(A) Is of record on the effective date of this chapter (or pertinent amendment thereto);
(B) Has continuously remained in separate ownership from abutting tracts of land throughout the entire period during which the creation of such lot was prohibited by any applicable zoning or other ordinance; and
(C) Is at least 30 feet wide.
(1960 Code, § 60-9-2)