In applying and interpreting this chapter, its provisions shall be held to be minimum requirements adopted for the promotion of the public health, safety, morals, comfort, convenience or the general welfare. The following specific interpretations shall apply:
A.
A minimum required lot area, yard, court or other required open space for one building or structure shall not be used, in whole or in part, as any part of the minimum required lot area, yard, court or other required open space for a second building or structure.
B.
The lot area, yard, court or other required open space for an existing building or structure shall not be diminished below the minimum requirements of this chapter.
C.
The required lot width for one lot or building or structure shall not be used, in whole or in part, as any part of the required lot width for a second lot or building or structure.
D.
The parking spaces required for one building or structure or use shall not be included in the computation of required parking spaces for a second building or structure or use.