Illumination of signs—further provisions
19.—(1) Nothing in this regulation shall apply to the signs shown in diagrams 560, 561, 776 and 781.
(2) Subject to the provisions of regulation 18 and paragraph (1), any sign shown in a diagram in Schedules 1 to 5 and 7, Part II of Schedule 10 and Schedule 12—
(a)when placed in consequence of the execution of road works must, and
(b)in other situations may,
be reflectorised in accordance with the following provisions of this regulation.
(3) 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 reflectorised.
(4) No retroreflecting material shall be applied to—
(a)any part of a sign coloured black;
(b)that part of the sign shown in diagram 7031 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;
(c)those parts of the signs shown in diagrams 2505, 2505.1, 2506, 2507, 2508, 2509.1, 2510, 2511, 2512, and 2513 which give information about the availability of parking places when that information is conveyed by means of a legend which is internally illuminated or formed of light-emitting characters,
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.