If a lawful use of a structure, or structure and premises in combination, exists at the effective date of adoption or amendment of the ordinance codified herein that would not be allowed in the district under the terms of this title, the lawful use may be continued, subject to the following provisions:
A. Enlarge Or Extend: No existing structure devoted to a use not permitted by this title in the district in which it is located shall be enlarged, extended, constructed, reconstructed or structurally altered except in changing the use of the structure to a use permitted in the district in which it is located.
B. Occupy Land Outside Building: Any nonconforming use may be extended throughout any of the parts of a building which were manifestly arranged or designed for such use at the time of adoption or amendment of the ordinance codified herein, but no such use shall be extended to occupy any land outside such building.
C. Changed To More Restrictive Classification: If no structural alterations are made, any nonconforming use of a structure, or structure and premises, may be changed to a more restricted classification.
D. Abandoned Or Discontinued Use: If any nonconforming use of a structure, or structure and premises in combination, is discontinued or abandoned for one year, the structure, or structure and premises in combination, shall not thereafter be used except in conformance with the regulations of the district in which it is located.
E. Partial Removal Or Destruction: Where nonconforming use status applies to a structure and premises in combination, removal or destruction in excess of fifty percent (50%) of the structure shall eliminate the nonconforming status of the land. (1983 Code § 11-1-8D)