(a) Required Setbacks to be Maintained. The required setbacks surrounding an existing principal building, which have been counted or calculated as part of a side setback, rear setback, front setback, setback adjacent to street right-of-way, or other open space required by this Code shall not, by reason of change in ownership or otherwise, be counted or calculated to satisfy the setback or other open space requirement for any other principal building.
(b) When one or more buildings, or parts thereof, are constructed or enlarged so as to cross one or more lot lines in the same ownership, all such lots shall be replatted into one lot provided all other zoning and subdivision regulations are met.
(c) Required Lot Area to be Maintained. A parcel of land may be subdivided into two or more parcels, provided all lots resulting from such division shall conform to all the lot area and width regulations of the district in which it is located. A lot of record that conformed to the provisions of this Code or any amendments thereto shall not be reduced in any manner that would make it non-conforming.