Tenn. Code Ann. § 7-86-317

Notwithstanding any other law to the contrary, the board shall promulgate rules and regulations to safeguard proprietary information submitted to the board. Such rules and regulations shall be consistent with determinations, actions, customs, and practices of the Tennessee regulatory agency with respect to proprietary information. Any information determined to be proprietary in accordance with such rules and regulations shall be confidential and shall not be open to the public for inspection, notwithstanding the public records provisions of title 10, chapter 7.