# 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 1.1.2.2

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

In the case of vehicles fuelled by LPG, NG/biomethane, the parent vehicle shall be tested in the type 1 test on the two extreme gas reference fuels set out in Annex IX. In the case of NG/biomethane, if the transition from one gas fuel to the other gas fuel is, in practice, aided through the use of a switch, this switch shall not be used during type-approval.
In the case of flex fuel H2NG vehicles, the parent vehicle shall be tested in the type 1 test with the following fuel compositions:
100 % H-gas.
100 % L-gas.
The mixture of H-gas and the maximum percentage of hydrogen specified by the manufacturer.
The mixture of L-gas and the maximum percentage of hydrogen specified by the manufacturer.

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Source: https://www.legislation.gov.uk/eur/2008/692/annex/I/division/1/division/1.1/division/1.1.2/division/1.1.2.2 (the official version)
Page: https://openlegislation.uk/eu-regulation-2008-692/annex-I/division-1/division-1.1/division-1.1.2/division-1.1.2.2
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.