Tenn. Code Ann. § 7-65-116

The municipality shall not, in any event, be liable for the payment of principal of or interest on any bonds of the authority, or for the performance of any pledge, mortgage, obligation or agreement of any kind whatsoever that may be undertaken by the authority, and none of the bonds of the authority or any of its agreements or obligations shall be construed to constitute an indebtedness of the municipality within the meaning of any constitutional or statutory provision whatsoever. In the event bonds of the authority are issued for a term greater than the life of the authority, the creating municipality shall assume the obligation of the bonds from and after the expiration of the period of duration of the authority.