law: Sashastra Seema Bal Act, 2007 
  135.  Execution of sentence of imprisonment.
  1.       Whenever
  
  any sentence of imprisonment is passed under this Act by a Force Court or
  
  whenever any sentence of death is commuted to imprisonment, the confirming
  
  officer or in case of a Summary Force Court the officer holding the Court or
  
  such other officer as may be prescribed shall, save as otherwise provided in
  
  sub-sections (3) and (4), direct that the sentence shall be
  
  carried out by confinement in a civil prison.
  2.       When a
  
  direction has been made under sub-section (1), the commanding officer of
  
  the person under sentence or such other officer as may be prescribed shall
  
  forward a warrant in the prescribed form to the officer in charge of the prison
  
  in which such person is to be confined and shall arrange for his dispatch to
  
  such prison with the warrant.
  3.       In the
  
  case of a sentence of imprisonment for a period not exceeding three months and
  
  passed under this Act by a Force Court, the appropriate officer under
  
  sub-section (1) may direct that the sentence shall be carried out by
  
  confinement in Force custody instead of in a civil prison.
  4.       On
  
  active duty, a sentence of imprisonment may be carried out by confinement in
  
  such place as the officer not below the rank of Additional Deputy
  
  Inspector-General within whose command the person sentenced is serving or any
  
  prescribed officer may from time to time appoint.