(620 ILCS 25/4) (from Ch. 15 1/2, par. 48.4)
    Sec. 4. "Airport hazard area" means any area of land or water, or both, upon which an airport hazard might be established if not prevented as provided in this Act, including any such area which has been declared to be an "airport hazard area" by the Department in connection with any airport approach plan adopted by the Department.
(Source: P.A. 81-840.)