Every person in possession of land within the city, either as owner, purchaser under contract, lessee, tenant or licensee, upon which is situated a trampoline shall at all times maintain on the lot or premises upon which such trampoline is located a fence completely surrounding such. Such fence or other structure shall conform with the ordinances of the city relating to fence height requirements with no gaps or apertures (other than doors or gates) more than four inches (4") square. All gates or doors opening through such enclosure shall be equipped with a self closing and self latching device designed to keep and capable of keeping such door or gate securely closed and locked at all times when not in actual use to prevent small children from opening said door or gate; provided, that the door of any dwelling and forming any part of the enclosure herein above required need not be so equipped. (Ord. O-07-2002, 2-4-2002)