No order of the Board of Appeals on Zoning permitting the erection or alteration of a building or character of an open air land use shall be valid for a period longer than six months unless such use is established within such period; provided, however, that where such use permitted is dependent upon the erection or alteration of a building, such order shall continue in force and effect if a building permit for the erection or alteration is obtained within such period, and such erection or alteration is started and proceeds to completion in accordance with such permit.
(Prior Code, § 153.625) (Ord. D-1418, § 2716, passed 11-22-1982, effective 1-21-1983)