34 Pa. Code § 405.35 – Landing doors.

(a) Swinging doors installed at the bottom landing of the shaftway shall open outward.
(b) Shaftway landing doors shall be equipped with a Department-approved interlock. The interlock shall:
1. (1) Secure the platform in the stop position or place the power of controlling the elevator beyond the operator’s control while any landing door is open.
2. (2) Operate in conjunction with a normally closed electrical valve operating system when used for maintained pressure hydraulic elevators.
(c) A landing door may unlock only when the platform is stopped at the level where the landing doors are located.
(d) Landing doors shall open manually from inside the shaftway regardless of the platform’s position.

This section cited in 34 Pa. Code § 405.31 (relating to applicability).