Whenever the lawful use of a building becomes non-conforming through a change in zoning requirements or district boundaries, the use may be continued and, if no structural alterations are made, it may be changed to another non-conforming use of the same or of a more restricted classification. Whenever the non-conforming use has been changed to a more restricted use or to a conforming use, the use shall not thereafter be changed to a less restricted use.
(1994 Code, § 155.146) (Ord. 200, passed 4-28-1969)