Any legal nonconforming use of land may be continued provided, however, that no such use shall be enlarged or intensified, nor shall it be extended to occupy a greater area of land than that occupied by such use at the time of the adoption of this article, unless specifically allowed by other provisions in this chapter, nor shall any such nonconforming use be moved in whole or in part to any other portion of the lot or parcel of land occupied by such nonconforming use at the time of the adoption of this article. Any change in use on a parcel of land on which a nonconforming use is located and will be continued, either in whole or in part, shall require Zoning Board of Appeals approval.

A building or structure, the use of which does not conform to the use regulations for the district in which it is situated, shall not be enlarged, extended or the exterior structurally altered unless the use therein is changed to a conforming use, except those repairs or modifications as may be determined necessary by the Building Department to either correct an unsafe condition, or to conform to the requirements of other applicable laws or ordinances.

No nonconforming use of a building or structure shall be enlarged or extended, except that any such nonconforming use may be extended throughout any parts of a building or structure which were obviously or manifestly arranged or designed only for such use at the time of the adoption of this article.

No nonconforming use shall be changed to another nonconforming use, except as provided herein.

If a nonconforming use ceases for any reason for a period of one year, or is changed to a conforming use, then any future use of the land, building or structure shall be in conformity with the provisions of this chapter. Substantial cessation of activities consistent with or required for the operation of such nonconforming use, or substantial vacancy of the building or structure in which the nonconforming use was conducted together with substantial cessation of activities consistent with or required for the operation of such nonconforming use shall be deemed to constitute a discontinuance thereof within the meaning of this chapter, irrespective of whether an intention to abandon the nonconforming use may exist. Upon application, however, the Zoning Board of Appeals may extend the one-year period upon finding that it is not reasonable in its application to the particular premises, taking into consideration the characteristics of the use, the investment which has been made in it, the circumstances of the discontinuance and the suitability of the structure for a permitted use in the district in which it is located.

If any building or structure in which any nonconforming use is conducted or maintained is hereafter removed, the subsequent use of the land on which such building or structure was located and the subsequent use of any building or structure erected thereon shall be in conformity with the standards specified by this chapter for the district in which such land is located.

Should a building or structure, the use of which, or the use of a portion of which, is nonconforming, be destroyed or damaged by any means to an extent greater than 50% of the replacement cost of the entire building or structure used in connection therewith at the time of the reconstruction, as determined by the Building Department, it shall not thereafter be reconstructed or used except in conformity with the provisions of this chapter. Should the damage be 50% or less, it may be reconstructed and any accompanying nonconformity continued, provided that the reconstruction is commenced within one year of the date of such damage and completed within two years of said date, and further provided that the reconstruction shall be conducted in accordance with a plan approved by the Zoning Board of Appeals, which may impose conditions and requirements pertaining to said use and design in order to result in the greatest reasonable conformity with the provisions of this chapter.

Should a dwelling or accessory building, the use of which is conforming, but is otherwise dimensionally nonconforming, be destroyed or damaged by any means, it may be repaired or reconstructed within the existing footprint within two years of said date without Zoning Board of Appeals approval.