N.Y. Comp. Codes R. & Regs. tit. 12, § 8-1.21 – Operation.

(1) Hoistway doors or gates to elevator landings that open or close with a swinging motion shall be manually operated.
(2) All doors or gates used on hoistways shall be set substantially flush with the hoistway line.
(3) Horizontal sliding hoistway gates of the collapsible type will not be permitted.
(c) All installations.
(1) In existing and future installations doors or gates at landings shall be manually operated, self-closing or power driven.
Exception:
Full automatic doors or gates will be permitted at the terminal landings for freight elevators operating at a speed not exceeding 75 feet per minute and at all landings of freight elevators used exclusively for automobiles.
(2) All manually operated hoistway doors or gates shall be provided with an interlock or electric contact as specified in sections 8-1.55 and 8-1.56, or other approved device performing similar functions.
Exceptions:
(1) Where freight hoistways provided with sliding doors or gates are equipped with operating or controlling devices that are not designed to coordinate with approved interlocks or electric contacts so as to provide safe conditions, or where, because of hoistway or elevator structural conditions, there are difficulties in effecting installations for the reliable operation of such devices, the Industrial Commissioner may permit in lieu thereof such other safeguards or conditions as will in his opinion provide reasonable safety. (2) Sliding doors or gates on hydraulic passenger elevators, equipped with a self-closing device which is not actuated by the movement of the car.
1. (3) Where electric contacts are installed, they shall be located so as to insure the door or gate being locked or latched when or before the contact is closed.
2. (4) All manually operated and all self-closing hoistway doors or gates shall be locked or latched when the car is not at the landing.
  Exceptions:
(1) Hoistway gates not more than 42 inches high. (2) Full automatic gates.
1. (5) Hoistway doors or gates shall not be openable from the floor side except by the use of a key.
  Exception:
  When the car is at the landing and the doors or gates are unlocked by the action of the car.
2. (6) It shall be optional with the owner or tenant of the building to arrange the hoistway doors or gates on any and all floors so they may be unlocked from the floor side by means of a key. To insure against the unauthorized use of a key, each tenant shall be responsible for the care and use of the hoistway door key or keys and he shall post and maintain a notice adjacent to each single elevator hoistway door or of each battery of elevators that will indicate how the key shall be available.
3. (7) The bottom landing hoistway door or gate of every elevator shall be openable from the outside by means of a key. In addition to the keys kept by the tenants, there shall be an emergency key which shall be kept in a glass covered box adjacent to such landing which shall be immediately returned when the emergency ceases.
4. (8) Power driven doors or gates shall be so arranged that they cannot be opened from the floor side except by use of an emergency key or other approved means.
5. (9) Self-closing doors that open or close with a swinging motion installed before November 1, 1920, may remain in place if the hoistway entrance is provided with a vertical sliding, self-closing, auxiliary gate, not less than 66 inches high, and conforming to the provisions of section 8-1.22.
6. (10) Where it is possible to unlock any gate by reaching the lock or latch from the floor side, such lock or latch shall be covered with an approved guard.

In factory buildings erected before October 1, 1913; in mercantile establishments in buildings erected before November 1, 1920.

(a) Existing installations.

Self-closing doors or gates that open or close with a swinging motion installed before November 1, 1920, may remain in place, if the hoistway entrance is provided with a vertical sliding, auxiliary gate, self-closing, not less than 66 inches high, constructed in accordance with section 8-1.22.

(b) Future installations.