52.—(1) Light signals conveying to pedestrians at level crossings the prohibition specified in paragraph (2) shall be of the size, colour and type shown in diagram 4006 and so designed that—
(a)the red figure shown in diagram 4006 is internally illuminated by an intermittent red light which is shown at a rate of flashing of not less than 60 nor more than 90 flashes per minute;
(b)the red figure is illuminated only when the intermittent red lights prescribed by regulation 39(2)(b) are illuminated; and
(c)the signal heads are ES compliant.
(2) The red figure when illuminated in the manner prescribed by paragraph (1) shall convey the prohibition that pedestrians shall not proceed beyond the transverse road marking shown in diagram 1003.2 on the footway or diagram 1001 on the carriageway.