Tenn. Code Ann. § 38-9-103

After proclamation of a civil emergency by the chief administrative officer, the officer may order a general curfew applicable to the geographical areas of the municipality or to the municipality as a whole, as the officer deems advisable, and applicable during those hours of the day or night the officer deems necessary in the interest of the public safety and welfare. The proclamation and general curfew shall have the force and effect of law and shall continue in effect until rescinded in writing by the chief administrative officer, but not to exceed fifteen (15) days.