(12)In order to take account of economic, social and technical developments, the power to adopt acts in accordance with Article 290 of the Treaty on the Functioning of the European Union should be delegated to the Commission in respect of adapting the deadlines for data transmission and the Annexes, except for the optional nature of the required data and the limitation of the scope as defined in the Annexes. The Commission should also be empowered to adapt the definitions to the changes in international definitions. 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 Council.