Chapter 28. National Security Areas
Section 1. General
28-1-1. DEFINITION
A National Security Area (NSA) consists of airspace
of defined vertical and lateral dimensions established at locations where there is a requirement for
increased security of ground facilities. Pilots are
requested to voluntarily avoid flying through an
NSA. When it is necessary to provide a greater
level of security, flight in an NSA may be
temporarily prohibited pursuant to the provisions of
14 CFR 99.7, Special Security Instructions. Where
there is a need to restrict flight operations in an
NSA, the required restriction will be issued by
Airspace and Rules and disseminated via NOTAM.
28-1-2. PURPOSE
An NSA is designated to enhance national security
and protect national assets.
28-1-3. CRITERIA
An NSA should be considered when a need to
protect national assets or a need to protect an area
in the interest of national security is identified.
28-1-4. DIMENSIONS
There are no standard dimensions for an NSA. The
dimensions should be the minimum to promote the
protection of the national asset or area identified.
28-1-5. CHARTING
NSAs shall be depicted on aeronautical charts to
inform users of the NAS regarding their vertical
and lateral dimensions. Additionally, a note shall be
depicted on the chart adjacent to the NSA stating
the requested avoidance altitude.
28-1-6. EXPIRATION, SUSPENSION, OR
REVOCATION
An NSA does not expire. However, an NSA may be
suspended or revoked at the discretion of Airspace
and Rules.
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