Answer
Yes, a Notified Body is currently required to review conformity to RED Article 3.3 (d), (e), and (f) because the EN 18031 series of standards, which are relevant for demonstrating compliance, have not yet been harmonized and listed in the Official Journal of the European Union.
Until harmonized standards are available, manufacturers must follow the Type Examination Procedure, which includes a formal conformity assessment conducted by a Notified Body. The Notified Body will verify and confirm compliance with RED Article 3.3 through a type examination certificate.
If the EN 18031 series becomes harmonized in the future, manufacturers may be able to self-declare conformity without involving a Notified Body. However, until harmonization occurs, the use of a Notified Body remains mandatory for demonstrating compliance with these requirements.