A lot of record on the effective date of this Zoning Code, or any amendment thereto, which does not comply with the area or width of lot regulations of the district in which it is located and is thereby nonconforming, may be used as follows:
(a) If occupied by a building, such building may be maintained, repaired or altered provided front, rear and side yards of less dimensions than required for the district may not be further reduced.
(b) If vacant, the lot may be used as site for a dwelling, provided:
(1) Rear yard requirements of the district are complied with;
(2) Side yards are not less than three feet on one side and eight feet on the opposite side where the lot has a frontage of less than fifty feet; or five feet and ten feet where the frontage is fifty feet or more; and
(3) Front yards shall not be less than the distance to the established setback of existing residences on the same side of the street and within the same block. (Ord. 67-17. Passed 5-15-67.)