Tennessee Code Title 12. Public Property, Printing and Contracts § 12-9-111

Any interlocal agreement entered into by local government entities that creates a local government joint venture entity shall be filed in the office of the comptroller of the treasury within ninety (90) days of execution of the agreement. Any interlocal agreement entered into by local government entities of this state that created a local government joint venture entity that is in effect on June 20, 2006, shall be filed with the office of the comptroller of the treasury within one hundred twenty (120) days of June 20, 2006.