All buildings, structures and uses not conforming to the regulations of the district in which they are located at the time of the enactment of this chapter shall be known and regarded as nonconforming.

A use of land for purposes other than those permitted by this chapter existing on the effective date of this chapter (adopted on September 3, 1974 and amended October 13, 1988 by Ordinance No. 27-88) may be continued upon the lot or in the building so occupied. Any such structure may be restored or repaired in the event of partial destruction or be relocated in the event of water encroachment or erosion. No structure used for purposes other than those permitted by this chapter shall be enlarged or rebuilt to a size larger than that existing as of the enactment of this chapter, unless it is shown that the remodeling or additional construction is reasonably necessary to and incidental to the continuation of the nonconforming use.

No nonconforming use shall, if changed into a conforming use, be changed back into a nonconforming use.

Where a nonconforming use has been abandoned for a consecutive period of two years and, in the opinion of the Planning Board, pursuant to the law in such case made and provided, has been in fact abandoned, said building shall not be reoccupied except in conformity with the use regulations for the district in which it is located and the use may not be resumed.