Nothing contained herein shall require any change in the plans, construction size or designated use of any building, structure or part thereof for which a building permit had been granted by the Building Inspector before or an amendment thereto; provided, however, that when construction is not begun under such outstanding permit within a period of 90 days subsequent to or an amendment thereto or where it has not been prosecuted to completion within 18 months subsequent to any further construction or use shall be in conformance with the provisions of this chapter.
(Ord. passed 11-3-1970; Am. Ord. passed 1-11-1972; Am. Ord. passed 7-3-1972)