70 ILCS 1815/26

Under no circumstances shall any bonds or certificates issued by the Port District or any other obligation of the Port District be or become an indebtedness or obligation of the State or of any other political subdivision of or municipality within the State, nor shall any such bond, certificate, or obligation be or become an indebtedness of the Port District within the purview of any constitutional limitation or provision. Each bond and certificate shall state clearly that it does not constitute such an indebtedness or obligation but is payable solely from the revenues or income of the Port District.