Tenn. Code § 66-32-130
Notwithstanding any other provisions of this part, a "premiere tourist resort city" defined as a municipality having a population of three thousand (3,000) or more persons, according to the federal census of 1980 or any subsequent federal census in which at least forty percent (40%) of the assessed valuation, as shown by the tax assessment rolls or books of the municipality, of real estate in the municipality consists of hotels, motels, tourist court accommodations, tourist shops and restaurants, is hereby authorized to adopt by its board of commissioners any ordinance necessary to regulate the sale and use of time-share units within its jurisdiction including the requirement of registration, licenses, transfer and related requirements including any related fees.
T.C.A. § 66-32-130