A.
No use or occupancy of any building, structure or land shall hereafter be changed to a different use or occupancy, and no building or structure or part thereof shall hereafter be erected, constructed, reconstructed, moved or structurally altered unless in conformity with all of the regulations herein specified for the district in which it is located, except as hereinafter provided.
B.
No building or other structure shall hereafter be erected or altered to exceed the height, to accommodate or house a greater number of families or persons, to occupy a greater percentage of lot area, or to have a narrower or smaller rear yard, front yard, side yards or other open spaces than are herein required, or in any other matter contrary to the provisions of this chapter, except as hereinafter provided.