If two or more lots or combinations of lots and portions of lots with continuous frontage were of record and in common ownership on the effective date of this chapter, and if one or more of those lots does not meet the minimum lot width, depth and area requirements of this district in which it is located, the land involved shall be considered an undivided parcel. No portion of any such parcel shall be developed, except in compliance with this chapter, nor shall any such parcel be divided so as to create a lot that does not meet the requirements of this chapter.
(1960 Code, § 60-9-3)