20 ILCS 3510/6
Any pledge of revenues, securities, funds, or other assets made by the Authority to secure payment of bonds issued under this Act shall be valid and binding and immediately effective from the time the pledge is made. Revenues, securities, funds, or other assets so pledged shall be held in the custody of either the Treasurer or a trustee or a depository (or any agent thereof) appointed by the Authority. Revenue, securities, funds, or other assets so pledged and thereafter received by the Authority or its designated depository shall immediately be subject to the lien of the pledge without any physical delivery thereof or other further act. The lien of any pledge shall be valid and binding as against, and superior to any claims of, all parties having claims of any kind in tort, contract, or otherwise against the Authority or any other person, irrespective of whether the parties have notice thereof. Neither the resolution nor any other instrument by which a pledge is created, nor any notice thereof or memorandum with respect thereto, need be filed or recorded except in the records of the Authority.
20 ILCS 3510/6