If, at the time of the enactment of this chapter or any subsequent amendment thereto, any legal activity is being pursued or any lot or structure legally utilized in a manner or for a purpose which does not conform to the provisions of this chapter, such manner of use or purpose may be continued as herein provided:
A.
If any change in title of possession or renewal of a lease of any such lot or structure occurs, the use existing may be continued.
B.
If any nonconforming use, structure or activity is discontinued for a period exceeding two years after the enactment of this chapter or any amendment thereto, it shall be deemed abandoned, and any subsequent use shall conform to the requirements of this chapter.
C.
A nonconforming structure, lot or use may be changed only to another use of a substantially similar character as the original use or to a more restrictive use.
D.
Whenever a nonconforming structure, lot or activity has been changed to a more limited nonconforming use, such existing use may be changed only to an even more limited use.
E.
When any nonconforming use is superseded by a permitted use, the use shall thereafter conform to the regulations for the district, and no nonconforming use shall thereafter be resumed.