In this Division interested person means (a) the controlling authority of the SMHU; and(b) the person who applied for the leave (if not the patient); and(c) if applicable, the patient's intended escort; and(d) the Tribunal; and(e) the Commissioner of Police; and(f) if applicable, the Secretary (Corrections); and(g) if applicable, the Director; and(h) if applicable, the Secretary (Youth Justice);responsible authority means (a) the Chief Psychiatrist; or(b) the controlling authority of the SMHU; or(c) the treating medical practitioner; or(d) an approved medical practitioner.