ILS Critical Area
It is the area of defined dimensions about the localizer and glide path antennas where vehicles, including aircraft, are excluded during all ILS operations.
ILS Sensitive Area
Its is the area extending beyond the critical area where the parking and/or movement of vehicles, including aircraft, is controlled to prevent the possibility of unacceptable interference to the ILS signal during ILS operations. This area is generally guarded when LVP in force.