Tenn. Code Ann. § 33-6-503

No defendant may be judicially committed under this part, unless two (2) licensed physicians, or one (1) licensed physician and one (1) licensed psychologist qualified as provided in § 33-6-427(a), file in the commitment proceeding certificates of need for care and treatment certifying that the defendant satisfies the requirements of § 33-6-502(1) -(4) and showing the factual foundation for the conclusions on each item. No defendant who is a child under sixteen (16) years of age may be judicially committed under this part unless one (1) of the certificates is by a physician or psychologist with experience with children.