2021 Tennessee Code
Chapter 19 - Energy Conservation Code
§ 13-19-106. Adoption by Local Governments

Each local government shall adopt the state code for energy conservation in new building construction with any amendments it deems reasonably necessary to accommodate local conditions. If the standards adopted by local governments are equal to or stricter than the code, the local standards shall control. If the local standards are less strict than the code standards, the code standards shall control.