law: Registration Act, 1908
  7. Offices of Registrar and Sub-Registrar
  (1) The State Government shall establish in every district and
  
  office to be styled the office of the Registrar and in every sub-district an
  
  office or offices to be styled the office of the Sub-Registrar or the offices
  
  of the Joint Sub-Registrars.
  (2) The State Government may amalgamate with any office of a
  
  Registrar any office of a Sub-Registrar subordinate to such Registrar, and may
  
  authorize any Sub-Registrar whose office has been so amalgamated to exercise
  
  and perform, in addition to his own powers and duties, all or any of the powers
  
  and duties of the Registrar to whom he is subordinate:
  PROVIDED that no such authorization shall enable a
  
  Sub-Registrar to hear an appeal against an order passed by himself under this
  
  Act.