Public parking garages with 225 or fewer spaces shall be permitted as-of-right, provided that such garages are, except for entrances and exits, entirely below the level of any street or publicly accessible open area upon which such facility, or portion thereof, fronts. In addition to a maximum number of 225 public parking spaces, such garages may include required accessory parking spaces, which may be provided at any level. Any accessory parking spaces that are not required shall be included with all other public parking spaces in such public parking garage for the purpose of applying any regulations in this Resolution relating to the number or location of parking spaces in such public parking garage.