law: Indian Boilers Act, 1923 
  13. Alterations and renewals to steam-pipes 
  Before the owner of any boiler registered under this Act makes
  
  any structural alteration, addition or renewal in or to any steam-pipe attached
  
  to the boiler, he shall transmit to the Chief Inspector a report in writing of
  
  his intention and shall send therewith such particulars of the proposed
  
  alteration, addition or renewal as may be prescribed.