law: Indian Boilers Act, 1923 
  3. Limitation of application 
  (1) Nothing in this Act shall apply in the case of any boiler or
  
  steam-pipe - 
  (a) in any steam-pipe as defined in section 3
  
  of the 15Indian Steam-ships Act, 1884, or in any steam-vessel as
  
  defined in section 2 of the Inland Steam-vessels Act, 1917; or
   16  [(b) belonging to, or under the control
  
  of, the Army, Navy or Air Force; or]
   17  [(c) appertaining to a sterilizer or
  
  disinfector of a type such as is commonly used in hospitals, if the boiler does
  
  not exceed 18[ninety-one liters] in capacity.]
  (2) The 19[Central Government] may, by notification
  
  in the Official Gazette, declare that the provisions of this Act shall not
  
  apply in the case of boilers or steam-pipes, or any specified class of boilers
  
  or steam-pipes, belonging to or under the control of any railway administered 20[by
  
  the 21[Central Government] or by any State Government] or by any
  
  railway company as defined in clause (5) of section 3 of the Indian Railways
  
  Act, 1890.