law: Registration Act, 1908
  10. Absence of Registrar or vacancy in his office
  (1) When any Registrar, other than the Registrar of a district
  
  including a Presidency-town, is absent otherwise than on duty in his district,
  
  or when his office is temporarily vacant, any person whom the Inspector-General
  
  appoints in this behalf, or, in default of such appointment, the Judge of the
  
  District Court within the local limits of whose jurisdiction the Registrar's
  
  office is situate, shall be the Registrar during such absence or until the
  
  State Government fills up the vacancy.
  (2) When the Registrar of a district including a Presidency-town
  
  is absent otherwise than on duty in his district, or when his office is
  
  temporarily vacant, any person whom the Inspector-General appoints in this
  
  behalf shall be the Registrar during such absence, or until the State
  
  Government fills up the vacancy.