Control Area means an electric power system or combination of electric power systems bounded by interconnection metering and telemetry to which a common automatic generation control scheme is applied in order to:
Control Area(s) means an electric power system or combination of electric power systems to which a common automatic generation control scheme is applied.
PJM Control Area means the Control Area recognized by NERC as the PJM Control Area.
Natural area means an area of the rural or non-urban environment which is in an unspoilt natural state or is of high scenic value, and includes, but is not limited to, national parks, game reserves, nature reserves, marine reserves, wilderness areas, areas of extensive agriculture and scenic areas;
area control service means air traffic control service for controlled flights in control areas;