# 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 4.1.3.1

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

A Type 1B, Type 2B, or Type 3B dual-fuel engine may warm-up or start using liquid fuel solely. In the case that the emission control strategy during warm-up or start-up in dual-fuel mode is the same as the corresponding emission control strategy in liquid-fuel mode the engine may operate in dual-fuel mode during warm-up or start-up. If this condition is not met the engine shall only warm-up or start-up using liquid fuel solely when in liquid-fuel mode.

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Source: https://www.legislation.gov.uk/eur/2017/654/annex/VIII/division/4/division/4.1/division/4.1.3/division/4.1.3.1 (the official version)
Page: https://openlegislation.uk/eu-regulation-2017-654/annex-VIII/division-4/division-4.1/division-4.1.3/division-4.1.3.1
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.