(a) Non-formulary drugs may be prescribed:(1) if no formulary drug exists that is as safe or effective in the specified situation;(2) if a limited trial of the drug is safer or more effective than any drug listed in the formulary, based on available medical evidence and the prescribing practitioner's clinical judgment;(3) if the course of therapy established prior to the individual's admission to the facility where he or she is being treated would be interrupted; or(4) in an emergency.(b) Each local authority shall develop and enforce written policies and procedures for monitoring and approving the prescribing of non-formulary drugs by its practitioners and contract practitioners.(c) HHSC shall develop and enforce written policies and procedures for monitoring and approving the prescribing of non-formulary drugs by HHSC facility practitioners and facility contract practitioners.