Section 280. Automatic fire extinguishing systems

Every factory building
  erected before October first, nineteen hundred thirteen, which  is  more
  than  one  story  in height and which has any occupancy specified by the
  board in its rules as of medium  or  high  hazard  below  its  uppermost
  floor,  shall  be  provided  by the owner thereof with an automatic fire
  extinguishing system.
    In every non-fireproof  factory  building  constructed  after  October
  first, nineteen hundred thirteen, which is more than one story in height
  and  which  has  any occupancy specified by the board in its rules as of
  high hazard  below  its  uppermost  floor,  the  story  containing  such
  occupancy  and  all  stories  above  it  shall  be provided by the owner
  thereof with an automatic fire extinguishing system.
    The automatic fire extinguishing  systems  required  by  this  section
  shall  be  approved  in the city of New York by the fire commissioner in
  such city and elsewhere in accordance with the rules of the  board.  The
  relative  hazard  of occupancies within said city shall be as determined
  by the board of standards and appeals thereof. The  provisions  of  this
  section  shall  be  enforced  in  the  city  of  New  York  by  the fire
  commissioner of said city and elsewhere by the commissioner.