The existing zoning ordinance of the city, including maps, is hereby superseded and amended as read as set forth herein; provided, however, that this title shall be deemed a continuation of the previous ordinance, and not a new enactment, insofar as the substance of revisions of the previous ordinance is included, whether in the same or in different language; and this title shall be so interpreted upon all questions of construction relating to tenure of officers and boards established by previous ordinances and to questions of conforming or nonconforming uses, buildings or structures, and to questions as to dates upon which such uses, buildings or structures became conforming or nonconforming. (Ord. 93-3, 9-1-1993)