No building or premises devoted to a nonconforming use shall be enlarged, extended, reconstructed or structurally altered unless its use is changed to a conforming use. (Code 1988, § 175-168)

A.nonconforming use shall be considered to be abandoned if there occurs a cessation of the nonconforming use on the part of the owner or tenant for a period of one year. Such buildings, structures or premises shall not be put to a nonconforming use after the nonconforming use has been abandoned. (Code 1988, § 175-169)

Any nonconforming building or use which has been changed to a conforming use shall not be changed back again to a nonconforming use. (Code 1988, § 175-170)

A.nonconforming building or use which has been destroyed by fire, explosion, flood, windstorm or other act of God shall be considered partially destroyed if the cost of the restoration equals one-half or less than one-half of the estimated equalized or true valuation of the building, as determined by the tax assessor, and such building or use may be rebuilt, restored or repaired. If the damage is greater than partial destruction, the building or use shall be considered completely destroyed and shall not be rebuilt, restored or repaired unless in conformity with the building and use requirements of this chapter. (Code 1988, § 175-171)

Such repairs and maintenance work as are required to keep it in sound condition may be made to a nonconforming building or structure, provided that no structural alterations shall be made except those which are required by law. (Code 1988, § 175-172)

Nothing in this chapter shall be interpreted as authorizing or approving the continuation of a use which was illegal when instituted and which has not been subsequently made legal by any township ordinance. (Code 1988, § 175-173)

(a) Any building on a lot existing on the effective date of the ordinance from which this chapter is derived which does not meet the minimum lot size requirements of this chapter and which building does not meet all the yard requirements may continue to be used and may be expanded and necessary buildings may be added, provided that the total permitted building coverage for the existing or new structures and the accessory building or addition is not exceeded and the new or accessory building or addition does not violate any other requirements of this chapter.

(b) Any lot existing on the effective date of the ordinance from which this chapter is derived which fails to comply with the minimum requirements of this chapter may be used for any use not otherwise prohibited in the zone in which it lies, provided that the lot was in single ownership on the effective date of the ordinance from which this chapter is derived and is still in single ownership and provided that all yard requirements of this chapter are complied with. (Code 1988, § 175-174)