# The Motor Vehicles (Driving Licences) Regulations 1996, Paragraph 1


Read in good daylight (with the aid of corrective 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) 12.3 metres, in the case of a unitary test conducted in respect of a vehicle included in category K;
(b) 20.5 metres in any other case.

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Source: https://www.legislation.gov.uk/uksi/1996/2824/schedule/8/part/5/paragraph/1 (the official version)
Page: https://openlegislation.uk/motor-vehicles-driving-licences-regulations-1996/schedule-8/part-5/paragraph-1
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.