Tenn. Code § 7-53-315
Notwithstanding §§ 7-53-306 and 7-53-307, in any municipality in which there has been created a central business improvement district pursuant to chapter 84 of this title, the municipality is authorized to aid or otherwise provide assistance, including without limitation, granting, contributing or pledging to, or for the benefit of the corporation, revenues derived from any source except revenues derived from ad valorem property taxes, for those projects, or portions thereof, that consist of public infrastructure, public improvements or other public facilities, including without limitation, one (1) or more parking or sports facilities, located within an area designated by appropriate resolution or ordinance by the municipality as the center city area, for such term or terms and upon such conditions as may be determined by the governing body of the municipality.
T.C.A. § 7-53-315