Any offence not punishable with death or imprisonment for life, committed by any person who at the date when he appears or is brought before the court is under the age of sixteen years, may be tried by the court of' a Chief- Judicial Magistrate, or by any court specially empowered under the Children Act, 1960 (60 of 1960), or any other law for the time being in force providing for the treatment, training and rehabilitation of youthful offenders.