# The Traffic Signs Regulations and General Directions 1994, Paragraph 3


For the purposes of this Schedule—
(a) in the case of a motor vehicle so constructed that it is fitted with a crane, dynamo, plant or other special appliance or apparatus which is a permanent or essentially permanent fixture, the appliance or apparatus is not to be deemed to constitute goods or burden of any description; and
(b) water, fuel or accumulators used for the purpose of the supply of power for the propulsion of a vehicle or, as the case may be, of any vehicle by which a trailer is drawn, and loose tools and loose equipment are not to be deemed to constitute goods or burden of any description.

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Source: https://www.legislation.gov.uk/uksi/1994/1519/schedule/18/paragraph/3 (the official version)
Page: https://openlegislation.uk/traffic-signs-regulations-and-general-directions-1994/schedule-18/paragraph-3
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.