A. When not in operation the elevator shall be kept in its down position and the sidewalk doors shall be closed.
B. When the elevator is being raised, pedestrians shall be warned of the fact by an automatic warning device approved by the Director.
C. The sidewalk elevator shall not be raised sooner than 15 minutes prior to a delivery and shall be placed in a down position and the sidewalk doors closed within 15 minutes of the completion of a delivery.