# The Motor Vehicles (Designation of Approval Marks) Regulations 1979, Paragraph 5

Extent: E+W+S+N.I.

The arrow shown outside and immediately below the rectangle in the markings relating to item Nos. 5 and 8 in Schedule 4 indicate the side on which the photometric specifications are satisfied up to an angle of 80°H on front position (side) lamps or rear position (side) lamps whose geometric angles of visibility are asymmetrical in relation to the reference axis in a horizontal direction. The absence of an arrow means that, both left and right, the photometric specifications are satisfied up to an angle of 80°H on such lamps.

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Source: https://www.legislation.gov.uk/uksi/1979/1088/schedule/5/paragraph/5 (the official version)
Page: https://openlegislation.uk/motor-vehicles-designation-of-approval-marks-regulations-1979/schedule-5/paragraph-5
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.