A detailed site plan shall be approved by the Planning Board before a building permit or certificate of occupancy is issued whenever it is proposed or intended that:
A.
A residential use be changed to a nonresidential use or partly residential and partly nonresidential.
B.
An existing nonresidential use be changed as to kind or size and in all cases where a changed use requires a change in parking standards; any new nonresidential project regardless of change in size.
C.
Unimproved realty be developed for any use other than one single-family dwelling.