(a) The purpose of this subchapter is to establish standards for prescribing psychoactive medication to patients served by the state mental health and mental retardation system in Texas.(b) This subchapter is not a clinical guide to prescribing psychoactive medication and is not the only source of information concerning related issues of appropriate practice.(c) Accepted guidelines, as defined in §415.3 of this title (relating to Definitions) supplement the use of this subchapter.