Any lawful use occupying a structure which exists prior to the date of adoption of the Development Code, but which would not be allowed under the terms of this Code may lawfully continue; provided that:
(A) Any structure housing a nonconforming use shall be maintained through ordinary repairs;
(B) No structure housing a nonconforming use shall be enlarged, altered, reconstructed or relocated unless the use of the structure is changed to a permitted use;
(C) No nonconforming use shall be extended to any part of the structure not intended or designed for the use, nor shall the nonconforming use be extended to occupy any land outside the structure;
(D) Any nonconforming use occupying a structure shall not be changed, except to a permitted use; and
(E) Any nonconforming use of a structure, or of a structure and premises in combination, shall not be discontinued longer than 12 consecutive months or 18 months during any three-year period or it shall not thereafter be allowed to resume; any discontinuance caused by government action and without any contributing fault by the nonconforming user shall not be counted in calculating the length of discontinuance. A nonconforming use may not be transferred from one party to another.