AIM 3-4-3

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3-4-3. Restricted Areas

a. Restricted areas contain airspace identified by an area on the surface of the earth within which the flight of aircraft, while not wholly prohibited, is subject to restrictions. Activities within these areas must be confined because of their nature or limitations imposed upon aircraft operations that are not a part of those activities or both. Restricted areas denote the existence of unusual, often invisible, hazards to aircraft such as artillery firing, aerial gunnery, or guided missiles. Penetration of restricted areas without authorization from the using or controlling agency may be extremely hazardous to the aircraft and its occupants. Restricted areas are published in the Federal Register and constitute 14 CFR Part 73.

b. ATC facilities apply the following procedures when aircraft are operating on an IFR clearance (including those cleared by ATC to maintain VFR-on-top) via a route which lies within joint-use restricted airspace.

1. If the restricted area is not active and has been released to the controlling agency (FAA), the ATC facility will allow the aircraft to operate in the restricted airspace without issuing specific clearance for it to do so.

2. If the restricted area is active and has not been released to the controlling agency (FAA), the ATC facility will issue a clearance which will ensure the aircraft avoids the restricted airspace unless it is on an approved altitude reservation mission or has obtained its own permission to operate in the airspace and so informs the controlling facility.

NOTE- The above apply only to joint-use restricted airspace and not to prohibited and nonjoint-use airspace. For the latter categories, the ATC facility will issue a clearance so the aircraft will avoid the restricted airspace unless it is on an approved altitude reservation mission or has obtained its own permission to operate in the airspace and so informs the controlling facility.

c. Restricted airspace is depicted on the en route chart appropriate for use at the altitude or flight level being flown. For joint-use restricted areas, the name of the controlling agency is shown on these charts. For all prohibited areas and nonjoint-use restricted areas, unless otherwise requested by the using agency, the phrase "NO A/G" is shown.

Aeronautical Information Manual (AIM) — Chapter 3 — Airspace
3-1-1 General • 3-1-2 Airspace Dimensions • 3-1-3 Airspace Hierarchy • 3-1-4 Basic VFR Weather Minimums • 3-1-5 VFR Cruising Altitudes

3-2-1 General • 3-2-2 Class A • 3-2-3 Class B • 3-2-4 Class C • 3-2-5 Class D • 3-2-6 Class E
3-3-1 General • 3-3-2 VFR Requirements • 3-3-3 IFR Requirements
3-4-1 General • 3-4-2 Prohibited Areas • 3-4-3 Restricted Areas • 3-4-4 Warning Areas • 3-4-5 MOAs • 3-4-6 Alert Areas • 3-4-7 Controlled Firing Areas
3-5-1 Airport Advisory Services • 3-5-2 MTRs • 3-5-3 TFRs • 3-5-4 Parachute Ops • 3-5-5 VFR Routes • 3-5-6 TRSAs • 3-5-7 National Security Areas