law: Prasar Bharati (Broadcasting Corporation of India) Act, 1990
  29.Authentication of orders and other
  
  instruments of Corporation
  All orders and decisions of the Corporation shall be
  
  authenticated by the signature of the Chairman or any other Member authorized
  
  by the Corporation in this behalf and all other instruments executed by the
  
  Corporation shall be authenticated by the signature of the Executive Member or
  
  by any officer of the Corporation authorized by him in this behalf.