Article 12 2.

The Commission shall periodically review the application of this Regulation and of the measures referred to in Article 3, and shall firstly report to the European Parliament and to the Council by 4 June 2011, and at the end of each reference period referred to in Article 11(3)(d) thereafter. When justified for this purpose, the Commission may request from the Member States information additional to the information contained in the reports submitted by them in accordance with paragraph 1 of this Article.