law: Emigration Act, 1983
  30. Power to prohibit emigration to any
  
  country in interest of the general public, etc.-
  (1) Where the Central Government has reason to
  
  believe that sufficient grounds exist for prohibiting emigration to any
  
  country, having regard to the sovereignty and integrity of India, the security
  
  of India, friendly relations of India with any foreign country or the interest
  
  of the general public, if may, by notification, prohibit emigration to that
  
  country.
  A notification issued under sub section (1)
  
  shall have effect for such period not exceeding six months as maybe specified
  
  in the notification.
  Provided that if the Central Government has
  
  reason to believe that the grounds mentioned in sub section (1) continues to
  
  exist, it may, from time to time, by notification, prohibit emigration to that
  
  country for such further period, not exceeding six months on each occasion, as
  
  may be specified in the notification.