law: 133. Power for confirming authority to mitigate, remit or commute sentences.
  Subject to such restrictions, reservations or conditions, as may be contained in any warrant issued under section 130 or section 131, a confirming authority may, when confirming the sentence of an Assam Rifles Court, mitigate or remit the punishment thereby awarded, or commute that punishment for any punishment or punishment lower in the scale laid down in section 57.