(620 ILCS 5/4) (from Ch. 15 1/2, par. 22.4)
    Sec. 4. "Public Aircraft" means an aircraft used exclusively in the service of any government or of any political subdivision thereof, including the government of any state, territory, or possession of the United States, or the District of Columbia, but not including any government-owned aircraft engaged in carrying persons or property for commercial purposes.
(Source: Laws 1945, p. 335.)