# The Motor Vehicles (Driving Licences) Regulations 1987, Paragraph 1


Read in good daylight (with the aid of glasses or contact lenses if worn) a registration mark fixed to a motor vehicle and containing letters and figures 79.4 millimetres high at a distance of—
(a) 20.5 metres, in any case except that mentioned below; and
(b) 12.3 metres, in the case of a driving test carried out on a vehicle of a class included in group K only.

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Source: https://www.legislation.gov.uk/uksi/1987/1378/schedule/4/paragraph/1 (the official version)
Page: https://openlegislation.uk/motor-vehicles-driving-licences-regulations-1987/schedule-4/paragraph-1
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.