# The Motor Vehicles (Designation of Approval Marks) Regulations 1979, Paragraph 16


In relation to the marking prescribed at item No. 34 in Schedule 4 —
(a) the symbol , indicating that the burning rate of the material has been determined for both the horizontal and the vertical directions, shall be varied, where appropriate, to either of the symbols or to indicate respectively that the burning rate has been determined for either the horizontal or vertical direction;
(b) the symbol shall only form part of the marking if the component has been approved according to its melting behaviour;
(c) the symbol shall only form part of the marking if the component has been approved as a complete device;
(d) the last four digits of the number below the rectangle shall be varied so as to be the number of the approval document issued for the motor vehicle part concerned; and
(e) the symbols referred to in sub-paragraphs (a), (b) and (c) above and the number referred to in sub-paragraph (d) shall be placed in the vicinity of the rectangle.

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Source: https://www.legislation.gov.uk/uksi/1979/1088/schedule/5/paragraph/16 (the official version)
Page: https://openlegislation.uk/motor-vehicles-designation-of-approval-marks-regulations-1979/schedule-5/paragraph-16
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.