Division 1.1.2.2 F1
United Kingdom
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:
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100 % H-gas.
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100 % L-gas.
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The mixture of H-gas and the maximum percentage of hydrogen specified by the manufacturer.
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The mixture of L-gas and the maximum percentage of hydrogen specified by the manufacturer.