# Road Vehicles Lighting Regulations (Northern Ireland) 2000, Paragraph 1


The illuminable sign referred to in regulation 17A(1) shall—
(a) be of a size and colour indicated in diagram 2;
(b) display the “schoolchild” pictogram shown in that diagram; and
(c) be illuminated by bulbs which shall emit a luminous intensity of not less than 4 candela and not more than 60 candela measured in the reference axis.
Diagram 2
Colour
Background areas — illuminated yellow or amber
Border and silhouette — black
Dimensions
A. Front— not less than 240mm
Rear— not less that 240mm
B. Front— not less than 20mm
Rear— not less than 20mm.
C. Front— not less than 200mm
Rear— not less than 200mm

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Source: https://www.legislation.gov.uk/nisr/2000/169/schedule/22A/paragraph/1 (the official version)
Page: https://openlegislation.uk/road-vehicles-lighting-regulations-northern-ireland-2000/schedule-22A/paragraph-1
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.