The following general regulations shall apply to all zoning districts:
(A) Except as otherwise provided, no building shall be erected, converted, enlarged, reconstructed, or structurally altered, nor shall any structure or land be used:
(1) Except for a purpose permitted in the district in which the structure or land is located.
(2) Except in conformance with the height and minimum lot requirements, and the parking and sign regulations, and any other applicable requirements of the district in which the structure or land is located.
(3) Except in conformance with any federal, state or county codes as may be applicable. Where these regulations and any other rules and regulations conflict or overlap, whichever imposes the more stringent restrictions shall prevail.
(B) The density and yard requirements of these regulations 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. No land required for yards or other open spaces about an existing building or any building hereafter erected or structurally altered shall be considered a yard or lot area for more than one building.
(C) 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 one main building on a lot except as otherwise provided in these regulations.
(D) Cooperatives, condominiums, and all other forms of property ownership do not affect the provisions of these regulations and all requirements shall be observed as though the property were under single ownership.