How often do EU directives related to CE marking get updated

The frequency of updates to EU directives related to CE marking depends on several factors:
* Declaration of Conformity The EU Declaration of Conformity (DoC) that is required for the CE marking must be kept up to date. Changes may arise from modifications to legislation, the product itself, or the contact details of the manufacturer or authorized representative[1].
* Harmonized standards When a "reference of superseded standard" is not empty, CE marking of products covered by harmonised standards continues to be compulsory[2]. During the co-existence period, manufacturers can choose which version to use (the superseded or the new version), but after the end of the co-existence period, only the revised version can be used[2].
* Medical Devices CE certificates issued by Notified Bodies are generally valid for three years, but the validity period may only be one year for some high-risk devices[4]. The EC Declaration of Conformity and CE mark are valid as long as your product meets the applicable health, safety, and environmental requirements of the applicable directive(s)[4].
* RoHS Directives The RoHS 2 and RoHS 3 directives are terms that are sometimes used to refer to updates to the EU RoHS Directive. However, all updates fall under the EU RoHS Directive[5].

Manufacturers should check the European Union website for the most up-to-date information to ensure compliance with current directives[4].