Any amounts set aside in such special fund which are not needed to provide for the payment of the items listed in paragraphs (1), (2), (3) and (4) may be used for any other lawful purpose, to the extent provided in such resolution or trust agreement. Such pledge shall be valid and binding from the time when the pledge is made. Such revenues or other moneys so pledged and thereafter received by the Service shall immediately be subject to the lien of such pledge without any physical delivery thereof or further act, and the lien of any such pledge shall be valid and binding as against all parties having any claims of any kind in tort, contract or otherwise against the Service, irrespective of whether such parties have notice thereof.
Neither the resolution nor any trust agreement by which a pledge is created need be filed or recorded except in the records of the Service, any State or local law to the contrary notwithstanding. The use and disposition of moneys to the credit of such special fund shall be subject to the provisions of the resolution authorizing the issuance of such bonds or of such trust agreement.
70 ILCS 3110/19