Mental Illness - As introduced, authorizes a licensed advance practice nurse or a licensed physician assistant, as long as either is working under the supervision of a licensed physician, to examine a detainee transported to a state-owned or state-operated hospital or treatment resource to determine whether the detainee is subject to admission; authorizes the nurse or physician assistant to complete a certificate of need for the emergency diagnosis, evaluation, and treatment. - Amends TCA Section 33-6-407 and Section 33-6-426.