Where legislation requires unique information, this can be included in the additional information section.
Uniquely the EU Machinery Directive requires a European Economic Area (EEA) address for where the Technical File (TF) is held. This is not required on the DoC by other product regulations as being newer regulations they automatically require the relevant economic operator(s) (e.g. European Importer) to hold the TF on ‘European soil’. The additional information section would be the place to include this.
The DoC should be in a suitable language for the relevant country. It doesn’t necessarily have to be the language of the country but needs to be in one acceptable for them. UK declarations must be in English.
Ideally all the relevant regulations or directives should be listed on one DoC, however, it is acceptable to have more than one as long as they are together in one document.
Finally, there is NO requirement in either the EU’s legislation or the UK’s legislation for the DoC to include a CE, UKCA or UKNI+CE mark.