Tenn. Code Ann. § 67-6-708: Termination of tax

(a) The tax imposed in this part shall remain in effect in the county or city on a perpetual basis as permitted by law, unless the city or county by ordinance or resolution, respectively, shall provide for a specific termination date.

(b) The city or county by ordinance or resolution respectively may provide for a specific period of time during which the tax shall be in effect.