# The Motor Vehicles (Designation of Approval Marks) Regulations 1979, Paragraph 18


The number shown outside and below the rectangle shall be in the vicinity of the rectangle and its last four digits shall be varied so as to be the number of the approval document issued for the motor vehicle part concerned.

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Source: https://www.legislation.gov.uk/uksi/1979/1088/schedule/5/paragraph/18 (the official version)
Page: https://openlegislation.uk/motor-vehicles-designation-of-approval-marks-regulations-1979/schedule-5/paragraph-18
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.