Tennessee Code Title 9. Public Finances § 9-21-125

(a)(1) Any pledge of, or lien on, revenues, fees, rents, tolls or other charges received or receivable by any local government to secure the payment of any bonds or notes issued by a local government pursuant to this chapter, and the interest thereon, shall be valid and binding from the time that the pledge or lien is created or granted and shall inure to the benefit of the holder or holders of any such bonds or notes until the payment in full of the principal thereof and premium and interest thereon.

(2) The priority of any pledge or lien with respect to competing pledges or liens shall be determined by the date such pledge or lien is created or granted.

(3) Neither the resolution nor any other instrument granting, creating, or giving notice of the pledge or lien need be filed or recorded to preserve or protect the validity or priority of such pledge or lien.