No person other than the owner, tenant or employee of the owner or tenant of any parking area within the shopping center zones of the city shall enter, trespass or loiter upon or park a motor or other vehicle in such parking area without the express permission of the owner or lessee of the parking area at times other than those when business establishments within the shopping center are open for business; provided, however, that nothing herein shall be deemed to prohibit parking in such areas for the purpose of patronizing businesses which may remain open after general closing hours for businesses within the area.
(`90 Code, § 11-217)  Penalty, see § 72.99