(70 ILCS 1860/12) (from Ch. 19, par. 295)
    Sec. 12. Under no circumstances shall any bonds issued by the District or any other obligation of the District be or become an indebtedness or obligation of the State of Illinois or of any other political subdivision of or municipality within the State.
    No revenue bond shall be or become an indebtedness of the District within the purview of any constitutional limitation or provision, and it shall be plainly stated on the face of each revenue bond that it does not constitute such an indebtedness or obligation but is payable solely from the revenues or income derived from terminals, terminal facilities, airports, airfields and port facilities.
(Source: Laws 1959, p. 71.)