(A) If two or more lots or combinations of lots and portions of lots with continuous frontage were lots of record and in common ownership prior to the date of adoption of the Development Code, and if one or more of those lots does not meet the minimum lot size requirements of the zoning district in which it is located, the land involved shall be considered an undivided parcel.
(B) No portion of any such parcel shall be developed except in compliance with this Code, nor shall any such parcel be divided so as to create a lot that does not meet the requirements of this Code.