# Commission Regulation (EC) No 692/2008 of 18 July 2008 implementing and amending Regulation (EC) No 715/2007 of the European Parliament and of the Council on type-approval of motor vehicles with respect to emissions from light passenger and commercial vehicles (Euro 5 and Euro 6) and on access to vehicle repair and maintenance information (Text with EEA relevance), Division 2.1.1: Final conformity factors

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

The conformity factor CF pollutant for the respective pollutant is specified as follows:
CO emissions shall be measured and recorded at RDE tests.
Pollutant
Mass of oxides of nitrogen (NO x )
Number of particles (PN)
Mass of carbon monoxide (CO)
Mass of total hydrocarbons (THC)
Combined mass of total hydrocarbons and oxides of nitrogen (THC + NO x )
CF pollutant
1 + margin with margin = 0,5
to be determined
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‘ margin ’ is a parameter taking into account the additional measurement uncertainties introduced by the PEMS equipment, which are subject to an annual review and shall be revised as a result of the improved quality of the PEMS procedure or technical progress.

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Source: https://www.legislation.gov.uk/eur/2008/692/annex/IIIA/division/2/division/2.1/division/2.1.1 (the official version)
Page: https://openlegislation.uk/eu-regulation-2008-692/annex-IIIA/division-2/division-2.1/division-2.1.1
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.