law: Constitution of India, 1949 
  22. Protection against arrest and detention in
  
  certain cases.- 
  (1) No person who is arrested shall be detained
  
  in custody without being informed, as soon as may be, of the grounds for such
  
  arrest nor shall he be denied the right to consult, and to be defended by, a
  
  legal practitioner of his choice.
  (2) Every person who is arrested and detained
  
  in custody shall be produced before the nearest magistrate within a period of
  
  twenty-four hours of such arrest excluding the time necessary for the journey
  
  from the place of arrest to the court of the magistrate and no such person
  
  shall be detained in custody beyond the said period without the authority of a
  
  magistrate.
  (3) Nothing in clauses (1) and (2) shall apply
  
  (a) to any person who for the time being is an enemy alien; or (b) to any
  
  person who is arrested or detained under any law providing for preventive
  
  detention.
  (4) No law providing for preventive detention
  
  shall authorize the detention of a person for a longer period than three months
  
  unless- 
  (a) an Advisory Board
  
  consisting of persons who are, or have been, or are qualified to be appointed
  
  as, Judges of a High Court has reported before the expiration of the said
  
  period of three months that there is in its opinion sufficient cause for such
  
  detention:
  (5) When any person is detained in pursuance
  
  of an order made under any law providing for preventive detention, the
  
  authority making the order shall, as soon as may be, communicate to such person
  
  the grounds on which the order has been made and shall afford him the earliest
  
  opportunity of making a representation against the order.
  (6) Nothing in clause (5) shall require the
  
  authority making any such order as is referred to in that clause to disclose
  
  facts which such authority considers to be against the public interest to
  
  disclose.
  (7) Parliament may by law prescribe- 
  (a)  the
  
  circumstances under which, and the class or classes of cases in which, a person
  
  may be detained for a period longer than three months under any law providing
  
  for preventive detention without obtaining the opinion of an Advisory Board in
  
  accordance with the provisions of sub-clause (a) of clause (4);
  (b) the maximum period
  
  for which any person may in any class or classes of cases be detained under any
  
  law providing for preventive detention; and
  (c) the procedure to
  
  be followed by an Advisory Board in an inquiry under sub-clause (a) of clause
  
  (4).