law: The National Green Tribunal Act, 2010 
  11. To act as
  
  Chairperson of Tribunal or to discharge his functions in certain circumstances.
  
  – 
  In the event of the
  
  occurrence of any vacancy in the office of the Chairperson of the Tribunal, by
  
  reason of his death, resignation or otherwise, such Judicial Member of the
  
  Tribunal as the Central Government may, by notification, authorise in this
  
  behalf, shall act as the Chairperson until the date on which a new Chairperson
  
  is appointed in accordance with the provisions of this Act.