Any use or structure existing at the time of the adoption of this chapter or any amendment thereto and which did not meet the requirements of such chapter or any amendment thereto at the respective times of adoption 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 partial destruction thereof. This provision shall not be construed as authorizing the continuance of any use which was contrary to zoning regulations at the time of the inception of such use. Nonconforming uses and structures shall be subject to the following regulations:
A.
Such building shall in no case be enlarged, unless the use therein is changed to a conforming use; provided, however, that the provisions of this subsection shall not apply to an existing residence located in a nonresidential zone wherein residential uses are prohibited. Such an existing residence may be extended or enlarged, provided that the yard requirements of the residential zone whose minimum lot size requirements most closely approximates the area of the residential lot are met.
B.
A nonconforming use shall not be extended at the expense of a conforming use.
C.
A nonconforming use changed to a conforming use may not thereafter be changed back to a nonconforming use.
D.
A nonconforming use shall not be permitted to be changed to another nonconforming use.
E.
In the event that there is a cessation of operation of any nonconforming use for a period of 12 consecutive calendar months, the same shall be presumed to be an abandonment of such nonconforming use. Any subsequent exercise of such abandoned nonconforming use shall be deemed a violation of the terms of this chapter, except such shall not apply to a nonconforming use because of height and area violations.
F.
A building which is conforming in use, but violates the yard setback or height requirements, may not be extended within any required yard or setback area nor extended above the height limits of this chapter.