Abandonment. If a nonconforming use is abandoned or discontinued for a period of 12 consecutive months, the nonconforming status of the use is terminated. Any future use of the land or structures shall be in conformity with the provisions of this code. The presence of a structure, equipment, or material shall not constitute the continuance of a nonconforming use unless the structure, equipment, or material is actually being occupied or employed in maintaining such use.