# Regulation (EC) No 661/2009 of the European Parliament and of the Council of 13 July 2009 concerning type-approval requirements for the general safety of motor vehicles, their trailers and systems, components and separate technical units intended therefor (Text with EEA relevance), Article 12: Electronic stability control systems

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

1. Vehicles of categories M1 and N1 shall be equipped with an electronic stability control system meeting the requirements of this Regulation and its implementing measures.
2. With the exception of off-road vehicles as defined in points 4.2 and 4.3 of Part A of Annex I of Regulation (EU) 2018/858, the following vehicles shall be equipped with an electronic stability control system meeting the requirements of this Regulation and its implementing measures:
(a) vehicles of categories M2 and M3, except for those with more than three axles, articulated buses and coaches, and buses of Class I or Class A;
(b) vehicles of categories N2 and N3 except for those with more than three axles, tractors for semi-trailers with a gross vehicle mass between 3.5 and 7.5 tonnes, and special purpose vehicles as defined in points 5.7 and 5.8 of Part A of Annex I of Regulation (EU) 2018/858;
(c) vehicles of categories O3 and O4 equipped with air suspension, except for those with more than three axles, trailers for exceptional load transport and trailers with areas for standing passengers.

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Source: https://www.legislation.gov.uk/eur/2009/661/article/12 (the official version)
Page: https://openlegislation.uk/eu-regulation-2009-661/article-12
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.