All buildings, structures and uses not conforming to the regulations of the district in which they are located at the time of this enactment, which were at one time lawful uses but were subsequently made nonconforming by virtue of this enactment, shall be known and regarded as nonconforming uses, subject to the following provisions:
A. 
A nonconforming building or use may be continued and may be changed to another nonconforming use of the same or of a more restricted classification.
B. 
Any nonconforming use or structure existing at the time of the adoption of this chapter may be continued upon the lot or in the building so occupied and any such structure may be restored or repaired in the event of destruction. No nonconforming structure shall be enlarged or rebuilt to a size larger than that existing as of the adoption of this chapter.
C. 
No nonconforming use shall, if once changed into a conforming use, be changed back into a nonconforming use.
D. 
No building shall be enlarged unless the use therein is changed to a conforming use.
E. 
No nonconforming use shall be extended.
F. 
The vacation of a nonconforming building or use for a consecutive period of one year shall be regarded as a permanent vacation, and thereafter the building shall not be reoccupied except in conformity with the regulations of the district in which it is located and the nonconforming use may not be resumed.
[1]
Editor's Note: Amended at time of adoption of Code (see Ch. 1, General Provisions, Art. II).