An Act amending Titles 18 (Crimes and Offenses) and 42 (Judiciary and Judicial Procedure) of the Pennsylvania Consolidated Statutes, in authorized disposition of offenders, further providing for sentence for murder, murder of unborn child and murder of law enforcement officer; in arson, criminal mischief and other property destuction, further providing for the offense of arson and related offenses; and, in sentencing, further providing for sentencing procedure for murder of the first degree.