# 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 3.2.1.1

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

In case of a natural gas/biomethane engine one of the following markings to be placed after the GB type-approval mark:
(a)H in case of the engine being approved and calibrated for the H-range of gases;
(b)L in case of the engine being approved and calibrated for the L-range of gases;
(c)HL in case of the engine being approved and calibrated for both the H-range and L-range of gases;
(d)H t in case of the engine being approved and calibrated for a specific gas composition in the H-range of gases and transformable to another specific gas in the H-range of gases by fine tuning of the engine fuelling;
(e)L t in case of the engine being approved and calibrated for a specific gas composition in the L-range of gases and transformable to another specific gas in the L-range of gases after fine tuning of the engine fuelling;
(f)HL t in the case of the engine being approved and calibrated for a specific gas composition in either the H-range or the L- range of gases and transformable to another specific gas in either the H-range or the L-range of gases by fine tuning of the engine fuelling;
(g)CNG fr in all other cases where the engine is fuelled with CNG/biomethane and designed for operation on one restricted gas fuel range composition;
(h)LNG fr in the cases where the engine is fuelled with LNG and designed for operation on one restricted gas fuel range composition;
(i)LPG fr in the cases where the engine is fuelled with LPG and designed for operation on one restricted gas fuel range composition;
(j)LNG 20 in case of the engine being approved and calibrated for a specific LNG composition resulting in a λ-shift factor not differing by more than 3 per cent the λ-shift factor of the G 20 gas specified in Annex IX, and the ethane content of which does not exceed 1,5 per cent;
(k)LNG in case of the engine being approved and calibrated for any other LNG composition;

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Source: https://www.legislation.gov.uk/eur/2011/582/annex/I/division/3./division/3.2./division/3.2.1./division/3.2.1.1. (the official version)
Page: https://openlegislation.uk/eu-regulation-2011-582/annex-I/division-3./division-3.2./division-3.2.1./division-3.2.1.1.
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.