Regulation 19 Illumination of signs
Nothing in this regulation shall apply to the signs shown in diagrams 560, 561, 776, 781, 5001.1, 5001.2, 5003, 5003.1, 5005 and 5005.1.
Subject to the provisions of regulation 18 and paragraph (1), any sign shown in a diagram in Schedules 1 to 5, 7, 10 and 12—
when placed as part of a road works scheme must, and
in other situations may,
be illuminated by the use of retroreflecting material in accordance with the following provisions of this regulation.
Subject to paragraph (4), where retroreflecting material is used on any part of a sign shown in a diagram, all other parts of that sign shall also be illuminated by means of retroreflecting material.
No retroreflecting material shall be applied to—
any part of a sign coloured black;
that part of the sign shown in diagram 605.2 which is coloured fluorescent yellow, unless the retroreflecting material is applied to that part in horizontal strips with a gap between each strip, or unless the retroreflecting material is itself also fluorescent;
that part of a sign shown in diagram 2714 or 2715 which is coloured orange,
and in this paragraph the word “part”, in relation to a sign, means any part of that sign which is uniformly coloured and bounded by parts of a different colour.