law: Industries (Development and Regulation) Act, 1951 
  13. Further provision for licensing of industrial
  
  undertakings in special cases 
  (1) No owner of an industrial undertaking, other than the
  
  Central Government, shall- 
  (a) in the case of an industrial undertaking
  
  required to be registered under section 10, but which has not been registered
  
  within the time fixed for the purpose under that section, carry on the business
  
  of that undertaking after expiry of such period, or
  (b) in the case of an industrial undertaking
  
  the registration in respect of which has been revoked under section 10A, carry
  
  on the business of the undertaking after the revocation, or
  (c) in the case of an industrial undertaking
  
  to which the provisions of this Act did not originally apply but became
  
  applicable after the commencement of this Act for any reason, carry on the
  
  business of the undertaking after the expiry of three months from the date on
  
  which the provisions of this Act became so applicable, or
  (d) effect any substantial expansion of an
  
  industrial undertaking which has been registered or in respect of which a
  
  license or permission has been issued, or
  (e) change the location of the whole or any
  
  part of an industrial undertaking which has been registered,
  except under, and in accordance with, a license issued in that
  
  behalf by the Central Government, and in the case of a State Government, except
  
  under and in accordance with the previous permission of the Central Government.
  
  
  (2) The provisions of sub-section (2) of section 11 and of
  
  section 12 shall apply, so far as may be, in relation to the issue of licenses
  
  or permissions to any industrial undertaking referred to in this section as
  
  they apply in relation to the issue of licenses or permissions to a new
  
  industrial undertaking.
  Explanation:  For the purposes of this section,
  
  "substantial expansion" means the expansion of an existing industrial
  
  undertaking which substantially increases the productive capacity of the
  
  undertaking, or which is of such a nature as to amount virtually to a new
  
  industrial undertaking, but does not include any such expansion as is normal to
  
  the undertaking having regard to its nature and the circumstances relating to
  
  such expansion.