188.8.131.52.5 Openings of Hoistway Doors or Gates From the Landing Side
(a) For elevators with car speeds up to 1.75 m/s (350 ft/min), hoistway doors or gates shall be provided with means that will latch the doors or gates mechanically so that they cannot be opened from the landing side, conforming to 184.108.40.206.1. Means shall be provided at a designated landing for unlatching the hoistway door or gate from the landing side to permit access to the car. At this landing, positive means shall be provided to lock the elevator entrance out of service.
(c) The mechanical locking device, when used on temporary doors, shall be self-latching.