5.—(1) No control device to enable a passenger to open or close a power-operated door shall be fitted to a regulated rail vehicle unless:
(a)the centre of the control device is not less than 700 millimetres and not more than 1200 millimetres vertically above an imaginary horizontal line extended from the door sill of the relevant doorway;
(b)the control device is operable by the palm of the hand exerting a pressure not exceeding 15 newtons;
(c)the control device or its immediate surround is illuminated continuously whenever it is operable;
(d)the control device contrasts with the surface on which it is mounted; and
(e)the control device is identifiable by touch.
(2) When power-operated doors are closed by a member of the operator’s staff the illumination of each such control device shall cease not less than 3 seconds before the doors start to close.