(20)A requirement to register in a central system radio equipment to be placed on the market may enhance the efficiency and effectiveness of market surveillance and thereby contribute to ensuring a high level of compliance with this Directive. Such a requirement entails additional burden to economic operators and should therefore be introduced only for those categories of radio equipment where a high level of compliance has not been attained. In order to ensure the application of such a requirement, the power to adopt acts in accordance with Article 290 TFEU should be delegated to the Commission in respect of the specification of the categories of radio equipment which manufacturers have to register within a central system and the elements of the technical documentation to be provided on the basis of the information on the compliance of radio equipment to be provided by Member States and following an evaluation of the risk of non-implementation of the essential requirements.