Article 21
1. Each Member State shall inform the Commission of the laws, regulations and administrative provisions adopted in implementation of this Regulation, including the measures referred to in Article 16. 2. By 19 April 2012, each Member State shall inform the other Member States and the Commission of the national authorities competent for implementing Articles 7, 9, 11 and 17. Based on that information, the Commission shall publish and update a list of those authorities on a yearly basis in the C series of the Official Journal of the European Union . 3. By 19 April 2017, and thereafter upon request of the Coordination Group and in any event every 10 years, the Commission shall review the implementation of this Regulation and present a report to the European Parliament and the Council on its application, which may include proposals for its amendment. Member States shall provide the Commission with all appropriate information for the preparation of the report, including information about the use of the single procedure provided for in Article 4(2).