For all uses other than residential, none of the requirements of this chapter for off-street parking shall apply to any real property within the "parking and business improvement area" of the City, as defined in Ordinance No. 506; provided, that the parking and business improvement license tax assessed on any business conducted on any of the rear property for which a building permit is required shall be paid in full, with all arrearage, if any, paid before such building permit shall be issued.