law: Census Act, 1948
  
  13 .Operation of other laws not barred:-
  Nothing in this Act shall be deemed to prevent
  
  any person from being prosecuted under any other law for any act or omission
  
  which constitutes an offence under this Act:
  
  Provided that no such prosecution shall be instituted except with the
  
  previous sanction referred to in section 12.