law: Code of Criminal Procedure Act, 1973
  366.Sentence of death to be submitted by Court of Session for confirmation.-
  (1) When the Court of Session passes a
  
  sentence of death, the proceedings shall be submitted to the High Court, and
  
  the sentence shall not be executed unless it is confirmed by the High Court.
  (2) The Court passing the sentence shall commit the convicted person to jail
  
  custody under a warrant.