# The Motor Vehicles (Designation of Approval Marks) Regulations 1979, Paragraph 20


In relation to the marking prescribed at item 30B, the suffix “S” shall be added to the number mentioned in paragraph 2 above to show that the tyre complies with the requirements on tyre rolling noise sound emissions in the ECE Regulation referred to in column (5) of Schedule 2.

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Source: https://www.legislation.gov.uk/uksi/1979/1088/schedule/3/paragraph/20 (the official version)
Page: https://openlegislation.uk/motor-vehicles-designation-of-approval-marks-regulations-1979/schedule-3/paragraph-20
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.