Except as hereinafter specified, no building, structure or land shall hereafter be used or occupied, and no building, structure, luminaire, fixture, or part thereof shall hereafter be erected, constructed, expanded, moved or altered, and no new lot shall be created, except in conformity with all of the regulations herein specified for the district in which it is located, unless a variance is granted. Any use not specifically listed or otherwise permitted in a district shall be deemed prohibited.