§ 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.