# The Road Vehicles (Construction and Use) Regulations 1986, Paragraph 2


This Part of this Schedule also applies to a vehicle if, when the engine is running without load at a fast idling speed,—
(a) the carbon monoxide content of the exhaust emissions from the engine exceeds the relevant percentage of the total exhaust emissions from the engine by volume;
(b) the hydrocarbon content of those emissions exceeds 0.02% of the total exhaust emissions from the engine by volume; or
(c) the lambda value is not within the relevant limits.

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Source: https://www.legislation.gov.uk/uksi/1986/1078/schedule/7B/paragraph/2 (the official version)
Page: https://openlegislation.uk/road-vehicles-construction-and-use-regulations-1986/schedule-7B/paragraph-2
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.