If a nonconforming use is discontinued, or a nonconforming building or structure is vacant, and remains unoccupied for a continuous period of six months or a total of six months within any 12-month period, the nonconforming use, building or structure shall not thereafter be occupied or used except in conformity with the regulations of the district in which the use, building or structure is located.
(1980 Code, § 29.801) Penalty, see § 162.999