# Road Vehicles Lighting Regulations (Northern Ireland) 2000, Paragraph 2


A roof bar shall—
(a) incorporate a sign which shall be of a size and colour indicated in diagram 3;
(b) display the “schoolchild” pictogram shown in that diagram to both the front and the rear of the roof bar;
(c) be illuminated by —
(i) bulbs that comply with the requirements of paragraph 1(c) of Part 1 of Schedule 22A; or
(ii) a lamp that complies with the requirements of paragraph 2(c), (d), and (e) of Part 2 of Schedule 22A except that in paragraph (e) the maximum pitch shall be 7mm, horizontally and vertically;
(d) incorporate the words “School Bus” to the left of the sign using a minimum font height of 110 mm to both the front and the rear of the roof bar; and
(e) have the sign, the words “School Bus” and warning lights referred to in paragraph 3 in alignment.
Diagram 3
Colour
Background areas — yellow or amber
Border and silhouette — black
Dimensions
A. Front— not less than 120mm
Rear— not less that 120mm
B. Front— not less than 10mm
Rear— not less than 10mm.
C. Front— not less than 100mm
Rear— not less than 100mm

---
Source: https://www.legislation.gov.uk/nisr/2000/169/schedule/22C/paragraph/2 (the official version)
Page: https://openlegislation.uk/road-vehicles-lighting-regulations-northern-ireland-2000/schedule-22C/paragraph-2
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.