Tenn. Code Ann. § 68-126-306

If the commissioner determines that the standards for construction and inspection of modular building units prescribed by statute or rule of another state are at least equal to rules prescribed under this part and that such standards are actually enforced by such other state, the commissioner may negotiate and enter into reciprocal agreements with appropriate officials of other states, or with an agent for such states. Any modular building unit inspected and approved under such an agreement shall be deemed to have been approved by the commissioner.