law: Industries (Development and Regulation) Act, 1951 
  10. Registration of existing industrial undertakings 
  (1) The owner of every existing industrial undertaking, not
  
  being the Central Government, shall, within such period as the Central
  
  Government may, by notification in the Official Gazette, fix in this behalf
  
  with respect to industrial undertakings generally or with respect to any class
  
  of them, register the undertaking in the prescribed manner.
  (2) The Central Government shall also cause to be registered in
  
  the same manner every existing industrial undertaking of which it is the owner.
  
  
  (3) Where an industrial undertaking is registered under this
  
  section, there shall be issued to the owner of the undertaking or the Central
  
  Government, as the case may be, a certificate of registration containing the
  
  productive capacity of the industrial undertaking and such other particulars as
  
  may be prescribed.
  (4) The owner of every industrial undertaking to whom a
  
  certificate of registration has been issued under this section before the
  
  commencement of the Industries (Development and Regulation) Amendment Act,
  
  1973, shall, if the undertaking falls within such class of undertaking as the
  
  Central Government may, by notification in the Official Gazette, specify in
  
  this behalf, produce, within such period as may be specified in such
  
  notification the certificate of registration for entering therein the productive
  
  capacity of the industrial undertaking and other prescribed particulars.
  (5) In specifying the productive capacity in any certificate of
  
  registration issued under sub-section (3), the Central Government shall take
  
  into consideration the productive or installed capacity of the industrial
  
  undertaking as specified in the application for registration made under
  
  sub-section (1), the level of production immediately before the date on which
  
  the application for registration was made under sub-section (1), the level of
  
  the highest annual production during the three years immediately preceding the
  
  introduction in Parliament of the Industries (Development and Regulation)
  
  Amendment Bill, 1973, the extent to which production during the said period was
  
  utilized for export and such other factors as the Central Government may
  
  consider relevant including the extent of under-utilization of capacity, if
  
  any, during the relevant period due to any cause.