# The Road Vehicles (Authorisation of Special Types) (General) Order 2003, Paragraph 5

Extent: E+W+S

(1) Where the length of a forward or rearward projection of a load carried on a relevant vehicle exceeds 3 metres, one side marker must be fitted to the right hand side of the projection and one side marker must be fitted to its left hand side.
(2) The side markers under sub-paragraph (1) must be fitted so that—
(a) each side marker is, as near as is practicable, in a longitudinal plane;
(b) no part of a side marker extends beyond the end of the projection;
(c) the vertical distance between the lowest part of each side marker and the surface of the road is not more than 2.5 metres;
(d) the horizontal distance between each side marker and the end-marker (or, as the case may be, the rear marking fitted to the projection in accordance with the Lighting Regulations) does not exceed 1 metre; and
(e) each side marker is clearly visible, within a reasonable distance, to a person using the road on that side of the projection.

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Source: https://www.legislation.gov.uk/uksi/2003/1998/schedule/8/paragraph/5 (the official version)
Page: https://openlegislation.uk/road-vehicles-authorisation-of-special-types-general-order-2003/schedule-8/paragraph-5
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.