An Act amending the act of July 9, 1976 (P. L. 817, No. 143), entitled "Mental Health Procedures Act," further providing for mental health review officers, for the use of statistical data, for immunity and for involuntary treatment; and providing for a return to inpatient status, for a stay of proceedings of a person charged with a crime, for voluntary treatment of a person charged with a crime or serving a sentence, for payment of costs for treatment, and for referral to county mental health and mental retardation programs.