Tenn. Code Ann. § 7-67-115

Except to the extent of any revenues that may be specifically allocated, transferred, contributed or pledged by a municipality in accordance with this chapter and laws, rules and regulations applicable to this chapter, no municipality shall in any event be liable for the payment of the 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.