A use, building or structure lawfully in existence as of December 27, 1960, which shall be made nonconforming at the passage of this chapter or any applicable amendment thereto may be continued except as otherwise provided in this article VII.
No existing building or premises devoted to a nonconforming use shall be enlarged, extended, reconstructed, substituted or structurally altered except when changed to a conforming use or when required to do so by law or ordered and as follows:
A. 
Restoration, alteration and enlargement. Any building or structure which existed at the effective date of this Zoning Chapter and was nonconforming on such date by reason of its design, its placement on a nonconforming lot or its location on a nonconforming lot and constituted an otherwise conforming use may be continued. In addition to such right of continuance, and the rights accorded when such building is the principal building on its lot, such principal building may be structurally altered or enlarged, provided that such structural alteration or enlargement does not create any new or further encroachment into any front yard, rear yard or side yard setback as required in this chapter, exclusive of the existing principal building, and does not create a new violation of the terms and provisions of this chapter, and provided further that the provisions of this section shall not be construed to waive the requirements of any other Code section of the Borough Code or Zoning Chapter.
B. 
Displacement. A nonconforming use shall not be extended to displace a conforming use.
C. 
Change of use.
(1) 
A nonconforming use or structure shall not be changed into a use which is permitted in a less restrictive district.
(2) 
A nonconforming use may be changed into a conforming use.
(3) 
A nonconforming use which is not permitted in any district or which is permitted only as a special use may only be changed into a conforming use.
(4) 
When a nonconforming use shall be changed in accordance with the provisions hereof, the use of the building and other structure or tract of land shall not thereafter be changed again except in accordance with these regulations.
D. 
Repairs and alterations.
(1) 
Normal maintenance repairs and incidental alteration of a building or other structure containing a nonconforming use is permitted, provided that it does not extend the area or volume of space occupied by nonconforming use. If the nonconforming use is a sign, it may be temporarily removed if necessary for maintenance and replaced, but it may not be altered or modified in any way except for repairs.
(2) 
A building or other structure containing residential nonconforming uses may be altered in any way to improve interior livability, provided that no structural alterations shall be made which would increase the number of dwelling units or the bulk of the building.
(3) 
A building or other structure containing a nonconforming use must be maintained in good condition and must not be allowed to become dilapidated.
E. 
Prior approval. Nothing herein contained shall require any change in the plans, construction or designated use of a building complying with existing laws, a permit for which had been duly granted and the construction of which shall have been started before December 27, 1960, and the ground story framework of which, including the second tier of beams, shall have been completed within six months of the date of the permit, and which entire building shall have been completed, according to such plans as have been filed, within one year of December 27, 1960.
A. 
Abandonment. The discontinuance of a nonconforming use for a period of one year and/or the change of use to a more restricted 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 affect the foregoing.
B. 
Partial destruction. When 50% or more of the existing floor area or volume of a building or structure, the use of which is nonconforming, is destroyed by fire or other casualty or act of God, the use of such building or structure as a nonconforming use shall thereafter be terminated.