Indiana Code Title 5. State and Local Administration § 5-1.5-9-11

Sec. 11. A pledge of revenues or other money made by the bank is binding from the time the pledge is made.  Revenues or other money so pledged and thereafter received by the bank are immediately subject to the lien of the pledge without any further act, and the lien of a pledge is binding against all parties having claims of any kind in tort, contract, or otherwise against the bank, regardless of whether the parties have notice of the lien.  Neither the resolution nor any other instrument by which a pledge is created needs to be filed or recorded except in the records of the bank.