# Commission Delegated Regulation (EU) 2017/654 of 19 December 2016 supplementing Regulation (EU) 2016/1628 of the European Parliament and of the Council with regard to technical and general requirements relating to emission limits and type-approval for internal combustion engines for non-road mobile machinery, Division 1: General requirements

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

Calculation of emissions shall be performed according to either section 2 (mass based calculations) or section 3 (molar based calculations). Mixture between the two methods is not permitted. It shall not be required to perform the calculations according to both section 2 and section 3.
The specific requirements for particle number (PN) measurement, where applicable, are laid down in Appendix 5.

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Source: https://www.legislation.gov.uk/eur/2017/654/annex/VII/division/1 (the official version)
Page: https://openlegislation.uk/eu-regulation-2017-654/annex-VII/division-1
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.