Except as herein provided:
A.
No building or land shall hereafter be used or occupied, and no building or part thereof shall be erected, moved or altered unless in conformity with the regulations herein specified for the district in which it is located. All uses not specifically listed in Schedule I are hereby prohibited in any use district (see Article V, § 150-16).
B.
Unless a variance has been granted by the Board of Appeals, no building shall hereafter be erected or altered to:
C.
No part of a yard or other open space required about any building for the purpose of complying with the provisions of this chapter shall be included as part of a yard or other open space similarly required for another building.