# Directive 2009/142/EC of the European Parliament and of the Council of 30 November 2009 relating to appliances burning gaseous fuels (codified version) (Text with EEA relevance), Division 2: The appliance or its data plate must bear the CE marking together with the following inscriptions:

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

the manufacturer's name or identification symbol,
the trade name of the appliance,
the type of electrical supply used, if applicable,
the appliance category,
the last two digits of the year in which the CE marking was affixed.
Information needed for installation purposes may be added according to the nature of the appliance.

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Source: https://www.legislation.gov.uk/eudr/2009/142/annex/III/division/2 (the official version)
Page: https://openlegislation.uk/eu-directive-2009-142/annex-III/division-2
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.