(A)   Authority. Any nonconforming building, structure or use which existed lawfully at the time of the adoption of this chapter and which remains nonconforming, and any such building, structure or use which shall become nonconforming upon the adoption of this chapter or of any subsequent amendment thereto, may be continued only in accordance with the regulations which set forth in this section.

   (B)   Repairs and alterations. Ordinary repairs and alterations may be made to a nonconforming building or structure, provided that no structural alterations shall be made in or to such building or structure, all or substantially all of which is designed or intended for a use not permitted in the district in which it is located, except those required by law, or except to make the building or structure, and use thereof, conform to the regulations of the district in which it is located.

   (C)   Additions and enlargements.

      (1)   A nonconforming building or structure, all or substantially all of which is designed or intended for a use not permitted in the district in which it is located, shall not be added to or enlarged in any manner unless such nonconforming building or structure, and use thereof, including all additions and enlargements thereto is made to conform to all the regulations of the district in which it is located.

      (2)   A nonconforming building or structure, which is nonconforming only as to bulk, shall not be added to or enlarged in any manner unless such additions and enlargements thereto are made to conform to all regulations of the district in which it is located.

   (D)   Moving. No building or structure, which does not conform to all of the regulations of the district in which it is located, shall be moved in whole or in part to any other location unless every portion of such building or structure is moved, and the use thereof is made to conform to all regulations of the district into which it is moved.

   (E)   Restoration of damaged nonconforming building. A building or structure, all or substantially all of which is designed or intended for a use which is not permitted in the district in which it is located, and which is destroyed or damaged by fire or other casualty or act of God, to the extent that the cost of restoration to the condition in which it was before the occurrence will exceed 50% of the cost of restoration of the entire building or structure new, shall not be restored unless the building or structure, and the use thereof, shall conform to all regulations of the district in which it is located. In the event that such damage or destruction is less than 50% of the cost of restoration of the entire building or structure new, no repairs or reconstruction shall be made unless such restoration is started within one year from the date of the partial destruction and is diligently prosecuted to completion.

   (F)   Discontinuance of use of nonconforming building or structure. A building, structure or portion thereof, all or substantially all of which is designed or intended for a use which is not permitted in the district in which it is located, and which is vacant, unoccupied, and not used on the effective date of this chapter or thereafter becomes vacant and remains unoccupied, or is not used for a continuous period of one year, shall not thereafter be occupied or used except by a use which conforms to the use regulations of the district in which it is located.

   (G)   Expansion of use in nonconforming building or structure. The nonconforming use of a part of a building or structure may be expanded within the building or structure in which the use is presently located, but no changes or structural alterations shall be made unless such changes or structural alterations, and the use thereof, conform to all the regulations of the district in which the building or structure is located.

   (A)   The lawfully existing nonconforming use of part or all of a building or structure, all or substantially all of which building or structure is designed or intended for a use permitted in the district in which it is located, may be continued subject to the provisions set forth in this section.

   (B)   Expansion of nonconforming use. The nonconforming use of part of a building or structure, all or substantially all of which building or structure is designed or intended for a use permitted in the district in which it is located, shall not be expanded or extended into any other portion of such building or structure, nor changed to any other nonconforming use.

   (C)   Discontinuance. If a nonconforming use of a building or structure, all or substantially all of which building or structure is designed or intended for a use permitted in the district in which it is located, is discontinued for a period of six months, it shall not be renewed, and any subsequent use of the building or structure shall conform to the use regulations of the district in which the premises are located.

   (D)   Change of a nonconforming use. No nonconforming use shall be changed to another nonconforming use when such nonconforming use is located in a building or structure, all or substantially all of which building or structure is designed or intended for a permitted use.

   (A)   Authority. The nonconforming use of land not involving a building or structure, or in connection with which any building or structure thereon is incidental or accessory to the principal use of the land, may be continued subject to the provisions set forth in this section.

   (B)   Expansion. A nonconforming use of land shall not be expanded or extended beyond the area it occupies.

   (C)   Discontinuance. If a nonconforming use of land is discontinued for a period of three consecutive months, it shall not thereafter be renewed, and any subsequent use of land shall conform to the regulations of the district in which the land is located.

   (D)   Change of use. A nonconforming use of land may be changed to any other nonconforming use allowed within the same or more restrictive zoning district that allows the existing nonconforming use.

   (E)   Elimination of nonconforming use of land. The nonconforming use of land shall be discontinued and cease in accordance with the following:

      (1)   Where no building or structure is employed in connection with such use, discontinued within one year.

      (2)   Where the only buildings or structures or other physical improvements employed are accessory or incidental to such use and have an assessed valuation on the effective date of this chapter of not more than $2,000, discontinued within two years.

      (3)   Where the improvements, underground or substantially at ground level, which comprise all or substantially all of the improvements employed in a nonconforming use of land and which have an assessed valuation on the effective date of this chapter of more than $2,000, discontinued within five years.