1.Member States shall adopt and publish the laws, regulations and administrative provisions necessary to comply with this Directive within a period of four months as from the date of its entry into force. They shall immediately inform the Commission thereof.They shall apply those measures from 1 January 2022.When Member States adopt those measures, they shall contain a reference to this Directive or shall be accompanied by such reference on the occasion of their official publication. The methods of making such reference shall be laid down by Member States.