This title is not to be applied in an ex post facto manner and any use in any zone which is nonconforming at the time of the passage hereof to the area that is not zoned will be allowed to continue and any lot which does not meet the minimum lot requirements of any zone at the time of the passage hereof will be allowed to be used for all purposes for which the area is now zoned if it meets the other requirements of the zone. (Ord. 15, 7-11-1977)