1. A structure or the use of a structure or land which was lawful before the passage or amendment of this chapter but which is not in conformity with the provisions of this chapter may be continued subject to the following conditions:
A. No such use shall be expanded, changed, enlarged, or altered in a way which increases its nonconformity.
B. No structural alteration, addition, or repair to any nonconforming structure over the life of the structure shall exceed 50 percent of its value at the time of its becoming a nonconforming use, unless the structure is permanently changed to a conforming use.
C. If such use is discontinued for 12 consecutive months, any future use of the building premises shall conform to this chapter. The assessor shall notify the Zoning Administrator in writing of instances of nonconforming uses which have been discontinued for 12 months.
D. If any nonconforming use or structure is destroyed by any means, including floods, to an extent of 50 percent or more of its value prior to destruction, it shall not be reconstructed except in conformity with the provisions of this chapter.
E. Uses or adjuncts thereof which are or become nuisances shall not be entitled to continue as nonconforming uses.
F. Except as provided in Subsection E, any use which has been permitted as a conditional use or variance shall be considered a conforming use.