(58)The power to adopt delegated acts in accordance with Article 290 TFEU should be delegated to the Commission in respect of, inter alia, the availability of certain mandatory particulars by means other than on the package or on the label, the list of foods not required to bear a list of ingredients, the re-examination of the list of substances or products causing allergies or intolerances, or the list of nutrients that may be declared on a voluntary basis. 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 simultaneous, timely and appropriate transmission of relevant documents to the European Parliament and to the Council.