70 ILCS 1815/25
To secure the payment of any or all bonds or certificates and for the purpose of setting forth the covenants and undertaking of the Port District in connection with the issuance thereof and the issuance of any additional bonds or certificates payable from such revenue income to be derived from the terminals, terminal facilities, port facilities and transportation facilities, the Port District may execute and deliver a trust agreement or agreements, provided that no lien upon any physical property owned by the Port District shall be created thereby. A remedy for any breach or default of the terms of any such trust agreement by the Port District may be by mandamus proceedings to compel performance and compliance therewith. The trust agreement may prescribe by whom or on whose behalf such action may be conducted.
70 ILCS 1815/25