Tenn. Code § 13-7-202
Whenever the planning commission of the municipality makes and certifies to the chief legislative body a zoning plan, including both the full text of a zoning ordinance and the maps, representing the recommendations of the planning commission for the regulation by districts or zones of the location, height, bulk, number of stories and size of buildings and other structures, the percentage of the lot which may be occupied, the size of yards, courts and other open spaces, the density of population, and the uses of buildings, structures and land for trade, industry, residence, recreation, public activities and other purposes, and identify areas where there are inadequate or nonexistent publicly or privately owned and maintained services and facilities when the planning commission has determined the services are necessary in order for development to occur, then the chief legislative body may exercise the powers granted and for the purposes mentioned in § 13-7-201, and may divide the municipality into districts or zones of such number, shape and areas it may determine, and, for such purposes, may regulate the erection, construction, reconstruction, alteration and uses of buildings and structures and the uses of land.
T.C.A. § 13-7-202