(31)The alignment of the procedures for the adoption of delegated acts by the Commission to the Treaty on the Functioning of the European Union and, in particular, to Article 290 and 291 thereof, should be effected on a case-by-case basis. In order to take into account the developments in auditing and in the audit profession, 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 particular, delegated acts are necessary for the purpose of adopting international auditing standards in the area of audit practice, independence of and internal controls of statutory auditors and audit firms. The international auditing standards adopted should not amend any requirements of this Regulation or supplement any of those requirements, except for those precisely defined. It is of particular importance that the Commission carry out appropriate consultations during its preparatory work, including consultations 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 to the Council.