Article 4
1. Member States shall bring into force the laws, regulations and administrative provisions necessary to comply with this Directive by 1 October 1999; however, if the publication of the texts referred to in Article 3 is delayed beyond 1 April 1999, the Member States shall comply with this obligation six months after the actual date of publication of these texts. They shall forthwith inform the Commission thereof. They shall apply those provisions from 1 October 1999, or, if the publication of the texts referred to in Article 3 is delayed beyond 1 April 1999, six months after the actual date of publication of those texts. 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. 2. Member States shall communicate to the Commission the texts of the main provisions of national law which they adopt in the field covered by this Directive.