# The Road Vehicles Lighting Regulations 1989, Paragraph 3


Any variation in a dimension as to the height of a letter specified in any of those diagrams shall be treated as permitted for the purposes of this Schedule if the variation—
(a) in the case of a dimension so specified as 105mm does not exceed 2.5 per cent of that dimension; or
(b) in the case of a dimension so specified as 70mm does not exceed 5 per cent of that dimension.

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Source: https://www.legislation.gov.uk/uksi/1989/1796/schedule/19/paragraph/3 (the official version)
Page: https://openlegislation.uk/road-vehicles-lighting-regulations-1989/schedule-19/paragraph-3
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.