law: Indian Boilers Act, 1923 
  34. Exemption 
   57  [(1) The State Government may, by notification in the
  
  Official Gazette, exempt from the operation of this Act, subject to such conditions
  
  and restrictions as it thinks fit, any boilers or classes or types of boilers
  
  used exclusively for the heating of buildings or the supply of hot water.]
   57  [58[(2) In case of any emergency, the State
  
  Government may, by general or special order in writing, exempt any boilers or
  
  steam-pipes or any class of boilers or steam-pipes or any boiler or steam-pipe
  
  from the operation of all or any of the provisions of this Act.
  (3) If the State Government is satisfied that, having regard to
  
  the material, design or construction of boilers and to the need for the rapid
  
  industrialization of the country, it is necessary so to do, it may, by
  
  notification in the Official Gazette and subject to such conditions and
  
  restrictions as may be specified in the notification, exclude arty specified
  
  class of boilers or steam-pipes in the whole or any part of the State, from the
  
  operation of all or any of the provisions of this Act.]