Where a lawful use or structure exists which, on the effective date of this chapter or subsequent amendment thereto, becomes nonconforming, such use or structure may be continued as long as it remains otherwise lawful, including subsequent sales of the property, subject to the following provisions:
A. The existing nonconforming use shall not be changed to a different nonconforming use.
B. No such nonconforming use or structure shall be altered or extended except if such use complies with the following criteria and standards:
(1) To provide for a natural expansion that is not detrimental to public health, safety and general welfare, provided that such expansion does not exceed 50% of the existing ground floor area of the structure or other space occupied by the use;
(2) Provided that such does not constitute the addition of a new nonconforming use or structure;
(3) Provided that such does not decrease yards when such already fail to meet minimum yard setback areas; and
(4) Provided that the alteration or extension meets the district regulations for such use or structure as if same were being altered or extended in the district where such use is permitted. In cases where the use is permitted in two or more districts, the most restrictive district regulations shall apply.
C. In the event that any nonconforming structure is destroyed or partially destroyed by any means to an extent of 75% or more of the market valuation of all structures and other improvements on the lot, as determined from the Centre County Tax Assessment Office effective at the date of the destruction, such nonconforming structure and use thereof may be repaired or reconstructed and used as before the time of damage, provided such repairs or reconstruction are completed within two years of the date of such damage. Should the nonconforming use or structure be redesigned to encompass a different or larger building footprint, the construction drawings for the new construction shall be submitted to the Borough Planning Commission for review and recommendation to Borough Council.
D. When a nonconforming use or structure is discontinued or abandoned for a period of one year or more continuously or replaced by a conforming use or structure, the premises shall not thereafter be used except in conformity with the regulations of the district in which it is located.