No building, structure or premises, or any part thereof, now existing or hereafter erected in Zoning Districts 4 (churches, public buildings and grounds) and 4a (clubs and lodges) shall be occupied or used unless or until an occupancy permit has been issued by the Building Inspector as provided for herein.

No building, structure or premises, or any part thereof, now existing or hereafter erected in Zoning District 6 (Business) shall be occupied unless or until an occupancy permit [for uses enumerated under § 16-15A(1), (2), (3), (4) or (5)] or a conditional use permit [for conditional uses under §§ 16-15A(6) and 16-16] has been issued by the Building Inspector as provided for herein.

No building structure or premises, or any part thereof, now existing or hereafter erected in Zoning District 11 (Silver Spring Business) shall be occupied unless or until a conditional use permit (as enumerated under § 16-21C) has been issued by the Building Inspector as provided for herein.

No change in the occupancy or use of any building, structure or premises or any part thereof in Districts 4, 4A, 8 and 9 shall be made unless or until a new occupancy permit has been issued by the Building Inspector.

No change in the occupancy or use of any building, structure or premises or any part thereof in Districts 6 and 11 shall be made unless or until a new conditional use permit has been issued by the Building Inspector.

"Occupancy" shall mean the owner or tenant who occupies or is in possession of the building, structure or premises. "Use" means the purpose for which a building, structure or premises is used or intended to be used.

The Building Inspector shall issue an occupancy permit after an application therefor has been filed in his office by the owner, his agent or tenant if, after inspection, the Building Inspector finds that such building, structure or premises or any part thereof complies with all of the regulations of this chapter and all other requirements of the law or ordinances applicable to the proposed occupancy. Such occupancy permit shall indicate the use of the building, structure or premises or any part thereof.

The Building Inspector shall issue a conditional use permit after approval by the Plan Commission if, after inspection, the Building Inspector finds that such building, structure, premises and operation complies with all conditions and restrictions as required by the Plan Commission, all of the regulations of the Code and all other requirements of the law or ordinances applicable to the proposed use and occupancy. Such conditional use permit shall indicate the use of the building, structure or premises or any part thereof and any conditions or restrictions applicable thereto.