# The Motor Vehicles (Designation of Approval Marks) Regulations 1979, Paragraph 2

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

The number shown outside and below the circle in any such marking will be varied, where appropriate, so as to be the number assigned by the competent authority of a Contracting State to distinguish the manufacturer of the motor vehicle or motor vehicle part concerned. The said number will be close to and outside the circle in such a position relative thereto as may be authorised by the relevant ECE Regulation, so however that it shall be read in the same direction as the number inside the circle.

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Source: https://www.legislation.gov.uk/uksi/1979/1088/schedule/3/paragraph/2 (the official version)
Page: https://openlegislation.uk/motor-vehicles-designation-of-approval-marks-regulations-1979/schedule-3/paragraph-2
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.