law: Public Premises (Eviction of Unauthorized Occupants) Act, 1971
  3.  Appointment of
  
  Estate Officers.-
  The Central Government may, be notification in
  
  the Official Gazette,-
  (a) appoint such persons, being Gazetted
  
  Officers of Government [ or of the Government of any Union Territory]
  or officer of equivalent rank of the [
  
  Statutory Authority] as it thinks fit, to be Estate Officers for the purposes
  
  of this Act;
  Provided that no officer of the Secretariat of
  
  the Rajya Sabha shall be so appointed except after consultation with the
  
  Chairman of the Rajya Sabha and no officer of the Secretariat of the Lok Sabha
  
  shall be so appointed except after consultation with Speaker of the Lok Sabha :
  
  
  Provided further that an officer of a Statutory
  
  Authority shall only be appointed as an Estate Officer in respect of the public
  
  premises controlled by that authority; and]
  (b) define the local limits within which, or
  
  the categories of public premises in respect of which, the Estate Officers
  
  shall exercise the powers conferred and perform the duties imposed, on Estate
  
  Officers by or under this Act.