Tenn. Code § 9-21-701
The governing body of a local government, acting by resolution, is hereby authorized to issue and sell interest-bearing grant anticipation notes for public works projects secured solely by a pledge of moneys, which pledge shall not be less than the principal amount of such notes, to be received pursuant to a contract or agreement between a state or federal agency and the local government. The resolution shall not be effective until the contract or agreement between the state or federal agency and the local government has been executed by all parties to the contract or agreement. The sale of all interest-bearing grant anticipation notes shall first be approved by the comptroller of the treasury or the comptroller's designee.
T.C.A. § 9-21-701