law: Coinage Act, 2011
  8. Power to call in
  
  coin.-
  Notwithstanding
  
  anything contained in section 6, the Government may, by notification, call in
  
  with effect from such date as may be specified in the notification, any coin,
  
  of whatever date or denomination and on and from the date so specified, such
  
  coin shall cease to be a legal tender, save to such extent as may be specified
  
  in the notification.