# 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 4.3.2.1: Characteristics of the dual-fuel warning system

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

The dual-fuel warning system shall consist of a visual alert system (icon, pictogram, etc.) left to the choice of the manufacturer.
It may include, at the choice of the manufacturer, an audible component. In that case, the cancelling of that component by the operator is permitted.
The visual element of the dual-fuel warning system shall not be the same as the one used for the purpose of NOx control diagnostics, or for other engine maintenance purposes.
In addition the dual-fuel warning system may display short messages, including messages indicating clearly the remaining distance or time before the activation of the operability restriction.
The system used for displaying the warning or messages referred to in this point may be the same as the one used for displaying the warning or messages related the NOx control diagnostics, or warning or messages for other maintenance purposes.
A facility to permit the operator to dim the visual alarms provided by the warning system may be provided on non-road mobile machinery for use by the rescue services or on non-road mobile machinery designed and constructed for use by the armed services, civil defense, fire services and forces responsible for maintaining public order.

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Source: https://www.legislation.gov.uk/eur/2017/654/annex/VIII/division/4/division/4.3/division/4.3.2/division/4.3.2.1 (the official version)
Page: https://openlegislation.uk/eu-regulation-2017-654/annex-VIII/division-4/division-4.3/division-4.3.2/division-4.3.2.1
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.