In any district, whenever a nonconforming use of land, building or structure or any part or portion thereof has been discontinued for a period of six months, such nonconforming use shall not thereafter be reestablished, and all future uses shall be in conformity with the provisions of this chapter. Such discontinuance of the active and continuous operation of such nonconforming use or part or portion thereof for such period of six months is hereby construed and considered to be an abandonment of such nonconforming use, regardless of any reservation of an intent not to abandon the same or of an intent to resume active operations. If actual abandonment of the nonconforming use of land and/or buildings is in fact evidenced by the removal of buildings, structures, machinery, equipment or other evidences of such nonconforming use, the abandonment shall be construed to be completed, and all rights to reestablish or continue such nonconforming use shall be terminated immediately.