(15)In order to improve the supplementary supervision of financial entities in a financial conglomerate, the power to adopt acts in accordance with Article 290 of the Treaty on the Functioning of the European Union (TFEU) should be delegated to the Commission in respect of technical adaptations to be made to Directive 2002/87/EC as regards the definitions, the alignment of terminology and the calculation methods set out in that Directive. It is of particular importance that the Commission carry out appropriate consultations during its preparatory work, including at expert level. The Commission, when preparing and drawing-up delegated acts, should ensure a simultaneous, timely and appropriate transmission of relevant documents to the European Parliament and the Council.