Except by permit of the Board of Adjustment, as provided in §§ 157.035 through 157.048, the nonconforming use of a building or structure may not be changed except to a conforming use; but where such change is made to a conforming use, the use shall not thereafter be changed back to a nonconforming use.
(Prior Code, § 60.20) (Ord. 2-92, passed - -1992)