# The Road Traffic (Carriage of Explosives) Regulations 1989, Paragraph 1


At all times when explosives are carried–
(a) two blank rectangular reflectorised orange-coloured plates conforming to the requirements of paragraphs 2 and 4 shall be affixed, one at the front and the other at the rear of the vehicle,
(b) two placards conforming to the requirements of paragraphs 3 to 8 shall be affixed, one to each side of the vehicle, trailer, semi-trailer or freight container in which the explosives are actually carried.

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Source: https://www.legislation.gov.uk/uksi/1989/615/schedule/4/paragraph/1 (the official version)
Page: https://openlegislation.uk/road-traffic-carriage-of-explosives-regulations-1989/schedule-4/paragraph-1
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.