law: Passports Act, 1967
  9. Conditions and forms of passports and
  
  travel documents
  The conditions subject to which, and the form
  
  in which, a passport or travel document shall be issued or renewed shall be
  
  such as may be prescribed:
  Provided that different conditions and different
  
  forms may be prescribed for different classes of passports or travel documents
  
  or for different categories of passports or travel documents under each such
  
  class:
  Provided further that a passport or travel
  
  document may contain in addition, to the prescribed conditions such other
  
  conditions as the passport authority may, with the previous approval of the
  
  Central Government, impose in any particular case.