Article 15
1. Member States shall bring into force the provisions necessary to comply with this Directive by 31 December 2013. They shall forthwith communicate to the Commission the text of those provisions. The Council encourages the Member States to draw up, for themselves and in the interests of the Union, their own correlation tables which will, as far as possible, illustrate the correlation between this Directive and the transposition measures, and to make them public. 2. When Member States adopt those provisions, they shall contain a reference to this Directive or be accompanied by such a reference on the occasion of their official publication. Member States shall determine how such reference is to be made. 3. The Commission shall prepare an interim progress report on the implementation of the main provisions of this Directive on the basis of relevant information from Member States, which shall be submitted to the European Parliament and to the Council by 14 December 2012. 4. Member States shall communicate to the Commission the text of the main provisions which they adopt in the field covered by this Directive.