No person shall stop, stand or park a vehicle for any purpose or length of time in any restricted parking zone other than for the purpose to which parking in such zone is restricted, except that a driver of a passenger vehicle may stop temporarily in such zone for the purpose of and while actually engaged in loading or unloading of passengers when such stopping does not interfere with any vehicle which is waiting to enter or about to enter the zone for the purpose of parking in accordance with the purposes to which parking is restricted and the driver must remain in the car. (Ord. 9-17, 2017)