law: Right to Fair Compensation and Transparency in Land Acquisition, Rehabilitation and Resettlement Act, 2013 
  60.
  
   Orders constituting Authority to be final and not
  
  to invalidate its proceedings.
  No order of the
  
  appropriate Government appointing any person as the Presiding Officer of an
  
  Authority shall be called in question in any manner, and no act or proceeding before
  
  an Authority shall be called in question in any manner on the ground merely of
  
  any defect in the constitution of an Authority.