Components or separate technical units may only be made available on the market or entered into service if they comply with the requirements of the relevant acts listed in Annex I and are properly marked in accordance with Article 34.

Paragraph 1 shall not apply in the case of components or separate technical units which are specifically constructed or designed for new vehicles not covered by this Regulation.

By way of derogation from paragraph 1, Member States may permit the making available on the market or entry into service of components or separate technical units which have been exempted from one or more provisions of this Regulation under Article 35 or are intended for mounting on vehicles covered by approvals granted under Article 37 that concern the component or separate technical unit in question.

By way of derogation from paragraph 1, and unless otherwise provided for in this Regulation or in one of the delegated acts adopted pursuant to this Regulation, Member States may permit the making available on the market or entry into service of components or separate technical units which are intended for mounting on vehicles which, when made available on the market or entered into service, were not required to be type-approved by this Regulation or by Directive 2003/37/EC.