(A) Conformity with regulations. No building, structure, or land shall hereafter be used or occupied, and no building or structure or part thereof shall hereafter be erected, constructed, reconstructed, moved or structurally altered except in conformity with all of the regulations herein specified for the district in which it is located.
(B) Minimum regulations. The density and yard regulations established herein are minimum regulations for each and every building existing at the effective date of these regulations and for any building hereafter erected or structurally altered.
(C) Application to each building. No part of a yard or other open space, or off-street parking or loading space required about or in connection with any building for the purpose of complying with these regulations, shall be included as part of a yard, open space, or off-street parking or loading space similarly required for any other building.
(D) One main building per lot. Every building hereafter erected or structurally altered shall be located on a lot as herein defined and in no case shall there be more than 1 main building on a lot except as follows:
(1) The lot lies within a RM, B, I-1 or I-C zoning district;
(2) A conditional use permit is issued for the construction of more than one main building on 1 lot;
(3) The required yards are maintained around the group of buildings; and
(4) Buildings that are parallel are separated by a horizontal distance that is at least equal to the height of the highest of the parallel buildings (see Figure 1.)
Figure 1: Distance Requirements for Parallel Buildings
(E) One main use per lot. Only 1 main use shall be allowed per lot, provided that more than 1 main use may be allowed per lot after the issuance of a conditional use permit.