If a lawful use involving individual structures, or of a structure and land in combination, exists at the effective date of adoption or amendment of this Ordinance, the lawful use may be continued so long as it remains otherwise lawful, subject to the following provisions:
(a) No existing structure devoted to a use not permitted by this Ordinance in the district in which it is located shall be enlarged, extended, constructed, reconstructed, moved, or structurally altered except in changing the use of the structure to a use permitted in the district in which it is located.
(b) Any nonconforming use may be extended throughout any parts of a building which were manifestly arranged or designed for such use at the time of adoption or amendment of this Ordinance, but no such use shall be extended to occupy any land outside such building.
(c) If no such structural alterations are made, any nonconforming use of a structure or structure and land, may, upon appeal to the Board of Zoning Appeals, be changed to another nonconforming use provided that the Board of Zoning Appeals shall find that the proposed use is equally appropriate or more appropriate to the district than the existing nonconforming use. In permitting such change, the Board of Zoning Appeals may require appropriate conditions and safeguards in accord with other provisions of this Ordinance.
(d) Any structure, or structure and land in combination, in or on which a nonconforming use is superseded by a permitted use, shall thereafter conform to the regulations for the district, and the nonconforming use may not thereafter be resumed.
(e) When a nonconforming use of a structure, or structure and land in combination is discontinued or abandoned for more than two (2) years (except when government action impedes access to the premises), the structure or structure and land in combination, shall not thereafter be used except in conformity with the regulations of the district in which it is located.
(f) Where nonconforming use status applies to a structure and land in combination, removal or destruction of the structure shall eliminate the nonconforming status of the land.