Michigan Compiled Laws, Chapter 324. Natural Resources and Environmental Protection § 324.21533

Sec. 21533. A pledge made by the authority is valid and binding from the time the pledge is made. The money or property pledged by the authority is immediately subject to the lien of the pledge without a physical delivery or further act. The lien of a pledge is valid and binding against parties having claims of any kind in tort, contract, or otherwise against the authority, and is valid and binding as against the transfers of the money or property pledged, irrespective of whether parties have notice. Neither the resolution, the trust agreement, nor any other instrument by which a pledge is created is required to be recorded to establish and perfect a lien or security interest in the pledged property.