Any pledge made to secure bonds shall be valid and binding from the time when the pledge is made. The revenues and receipts or property or interests in property pledged and thereafter received by the Authority or trustee shall immediately be subject to the lien of the pledge without any physical delivery of the pledge or further act, and the lien of any such pledge shall be valid and binding as against all parties having claims of any kind in tort, contract, or otherwise against the Authority or trustee irrespective of whether the parties have notice thereof. Neither the ordinance, nor any other instrument by which a pledge is created, need be recorded.
50 ILCS 465/30