# The Road Vehicles Lighting Regulations 1989, Paragraph 12

Extent: E+W+S

Other requirements–
(a) Every main-beam headlamp shall be so constructed that the direction of the beam of light emitted therefrom can be adjusted whilst the vehicle is stationary.
(b) Except in the case of a bus first used before 1st October 1969, where two main-beam headlamps are required to be fitted they shall form a matched pair.

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Source: https://www.legislation.gov.uk/uksi/1989/1796/schedule/5/paragraph/12 (the official version)
Page: https://openlegislation.uk/road-vehicles-lighting-regulations-1989/schedule-5/paragraph-12
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.