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

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

The figure following the number 24 shown outside and on the right of the circle in the marking relating to item No. 24 in Schedule 2 (which indicates the corrected absorption coefficient of the vehicle part to which that marking relates) will be varied, where appropriate, in accordance with the requirements of the ECE Regulation specified in column (5) of Schedule 2 in relation to that marking.

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Source: https://www.legislation.gov.uk/uksi/1979/1088/schedule/3/paragraph/5 (the official version)
Page: https://openlegislation.uk/motor-vehicles-designation-of-approval-marks-regulations-1979/schedule-3/paragraph-5
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.