N.Y. Multiple Residence Law § 131

§ 131. Shafts, elevators and dumbwaiters. Every shaft shall be\nenclosed on all sides with fireproof walls and shall have fireproof\ndoors and assemblies at all openings, with the doors self-closing. Not\nmore than three elevators or dumbwaiters shall ever be placed in the\nsame shaft. All dumbwaiter doors shall be fastened by an interior lock\nin the shaft operated and controlled from a central point. The doors of\nevery elevator shaft shall be provided with an automatic device to\nprevent the normal operation of the elevator unless the hoistway door at\nwhich the car is standing is closed and locked, or unless all hoistway\ndoors are locked in a closed position. Such doors, except for\npower-operated sliding doors, shall have a vision panel of wire glass\nnot exceeding one square foot in area. Every elevator shall be equipped\nwith a gate or door with an automatic device to prevent the normal\noperation of such elevator unless such gate or door is closed.\n