# Motor Vehicles (Construction and Use) Regulations (Northern Ireland) 1999, Paragraph 8


This Part of this Schedule applies to a vehicle if with free acceleration, the coefficient of absorption of the exhaust emissions from the engine of the vehicle immediately after leaving the exhaust system exceeds—
(a) if the engine of the vehicle is turbo-charged, 3.0 per metre, or
(b) in any other case, 2.5 per metre.

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Source: https://www.legislation.gov.uk/nisr/1999/454/schedule/10/paragraph/8 (the official version)
Page: https://openlegislation.uk/motor-vehicles-construction-and-use-regulations-northern-ireland-1999/schedule-10/paragraph-8
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.