Tenn. Code Ann. § 4-51-132: Preemption

The general assembly, by enacting this chapter and title 39, chapter 17, part 6, intends to preempt any other regulation of the area covered by this chapter and title 39, chapter 17, part 6. No political subdivision or agency may enact or enforce a law, ordinance, resolution or regulation that regulates or prohibits any conduct in the area covered by this chapter and title 39, chapter 17, part 6.