# The Traffic Signs Regulations and General Directions 2016, Paragraph 6

Extent: E+W+S

Information about the manufacture of a cone, cylinder or delineator required in order to comply with British Standard BS EN 13422:2004+A1:2009 or British Standard BS 8442:2015 (or, in either case, a corresponding EEA standard) and occupying an area not exceeding 30 square centimetres, may be indicated on the part coloured white in characters not exceeding 5 mm in height, leaving at least 90% of the remaining area of white colour illuminated with white retroreflecting material.

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Source: https://www.legislation.gov.uk/uksi/2016/362/schedule/13/part/8/paragraph/6 (the official version)
Page: https://openlegislation.uk/traffic-signs-regulations-and-general-directions-2016/schedule-13/part-8/paragraph-6
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.