If, at the time of the enactment of this chapter, any building is being used, or any building is being constructed or altered and is completed within six months thereafter, in a manner or for a purpose which does not conform to requirements of this chapter but which is not prohibited by any other existing ordinance of the Borough of Hawthorne, such use, manner or purpose may be continued, nor shall any change of title or of right to possession affect such continuation of an existing use; subject, however, to the provisions of this article hereinafter set forth.
No existing building or structure devoted to a nonconforming use shall be enlarged, extended, reconstructed or structurally altered, except as follows:
A. 
Restoration. Any nonconforming building or structure which, as a result of fire, explosion or other casualty, is partially damaged or destroyed, and the cost of necessary alterations, repairs or reconstruction does not exceed 60% of its market value (not including land value), may be restored, reconstructed or used as before, provided that the bulk, height and area requirements shall not be in excess of that which existed prior to said damage. Such restoration must be commenced within six months and completed within one year of such occurrence, or the use of such building, structure or land as a legal nonconforming use shall thereafter be terminated.
B. 
Extension. A nonconforming use shall not be extended, but the extension of a lawful use to any portion of a nonconforming building which existed prior to the enactment of this chapter shall not be deemed the extension of such nonconforming use; and further provided, however, that where a nonconformity as to lot size, setback, side yard, rear yard or other standard based upon measurement renders a lot, building or use nonconforming, any extension, addition or alteration of such building or other buildings or structures on the same lot which does not increase or extend the specific nonconformity shall not be deemed an extension of a nonconforming 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. 
Repairs. Normal maintenance repairs and incidental alteration of a building or structure containing a nonconforming use shall be permitted, provided that said repairs and alterations do not extend the volume or area of space occupied by the nonconforming use.
F. 
Construal of provisions. Nothing in this chapter shall be interpreted as authorization for or approval of the continuance of the use of a structure or premises in violation of zoning regulations in effect at the time of the effective date of this chapter.
A. 
Abandonment. The discontinuance of a nonconforming use for a period of one year and/or the change of use to a more restrictive or conforming use for any period of time shall be considered an abandonment thereof, and such nonconforming use shall not thereafter be revived. Intent to resume active operations shall not constitute continuance of a nonconforming use.
B. 
Partial destruction. Any nonconforming building or structure which, as a result of fire, explosion or other casualty, is partially damaged or destroyed and requires alterations, repairs or reconstruction, the cost of which exceeds 60% of its market value (not including land); the use of such building or structure as a nonconforming use shall thereafter be terminated and any new construction shall be in accordance with the regulations of this chapter.