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 regulations apply:
A.
A minimum required lot or yard size for one building or structure shall not be used in whole or in part as any part or a required lot or yard for a second structure.
B.
The required lot or yard for an existing building or structure shall not be diminished below the minimum requirements of this chapter, unless a variance is granted pursuant to Article IX.
C.
The parking spaces required for one building or structure or use shall not include in the computation of required parking spaces for a second building or structure or use.