1. Member States shall adopt and publish, by 1 January 2018, the laws, regulations and administrative provisions necessary to comply with this Directive. They shall forthwith communicate to the Commission the text of those measures.
2. They shall apply those measures from 1 July 2018.
3. When Member States adopt those measures, 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.
4. Member States shall communicate to the Commission the text of the main provisions of national law which they adopt in the field covered by this Directive.