# Commission Regulation (EU) No 582/2011 of 25 May 2011 implementing and amending Regulation (EC) No 595/2009 of the European Parliament and of the Council with respect to emissions from heavy duty vehicles (Euro VI) and amending Annexes I and III to Directive 2007/46/EC of the European Parliament and of the Council (Text with EEA relevance), Division 1.2.2: Exhaust emissions type-approval of an engine running on natural gas/biomethane or LPG and designed for operation on one specific fuel composition.

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

The parent engine shall meet the emission requirements on the reference fuels G R and G 25 in the case of CNG, on the reference fuels G R and G 20 in the case of LNG, or on the reference fuels A and B in the case of LPG, as specified in Annex IX. Fine-tuning of the fuelling system is allowed between the tests. This fine-tuning will consist of a recalibration of the fuelling database, without any alteration to either the basic control strategy or the basic structure of the database. If necessary, the exchange of parts that are directly related to the amount of fuel flow such as injector nozzles is allowed.

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Source: https://www.legislation.gov.uk/eur/2011/582/annex/I/division/1/division/1.2/division/1.2.2 (the official version)
Page: https://openlegislation.uk/eu-regulation-2011-582/annex-I/division-1/division-1.2/division-1.2.2
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.