Tennessee Code Title 7. Consolidated Governments and Local Governmental Functions and Entities § 7-67-116

(a) Except as may be expressly prohibited by this section, any municipality is authorized to aid or otherwise provide assistance to an authority created pursuant to this chapter by such municipality, including entering into leases of projects, or parts of projects with an authority, for such term or terms and upon such conditions as may be determined by the governing body of such municipality, notwithstanding and without regard to the restrictions, prohibitions, or requirements of any other law, whether public or private, or granting, contributing or pledging revenues of the municipality to or for the benefit of the authority derived from any source, except revenues derived from ad valorem property taxes that shall not be granted, contributed or pledged by the municipality in payment of or collateral for any revenue bonds of the authority.

(b) In addition to the powers granted in this chapter, any metropolitan government or legislative bodies of municipalities, acting jointly, in any county having a population in excess of eight hundred thousand (800,000), according to the 1990 federal census or any subsequent federal census, is authorized to aid or otherwise provide assistance to an authority created pursuant to the provisions of this chapter by such metropolitan government or municipalities, acting jointly, in any county having a population in excess of eight hundred thousand (800,000), according to the 1990 federal census or any subsequent federal census, by entering into contracts with any other party in furtherance of the purposes of this chapter, for such term or terms and upon such conditions as may be determined by the governing body of such metropolitan government or legislative bodies of municipalities, acting jointly, in any county having a population in excess of eight hundred thousand (800,000), according to the 1990 federal census or any subsequent federal census.