(620 ILCS 5/9) (from Ch. 15 1/2, par. 22.9)
Sec. 9.
"Air navigation facility" means any facility other than one owned
or controlled by the Federal Government, used in, available for use in, or
designed for use in, aid of air navigation, including airports, restricted
landing areas, and any structures, mechanisms, lights, beacons, marks,
communicating systems, or other instrumentalities or devices used or useful
as an aid, or constituting an advantage or convenience, to the safe
taking-off, navigation, and landing of aircraft, or the safe and efficient
operation or maintenance of an airport or restricted landing area, and any
combination of any or all of such facilities.
(Source: Laws 1945, p. 335.)
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