1. Member States shall adopt before 1 January 1994 the laws, regulations and administrative provisions necessary to comply with this Directive. They shall forthwith inform the Commission thereof.
2. The date of entry into force which Member States shall lay down for those provisions shall be no later than 1 January 1995.
3. 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.
4. When Member States adopt these measures, they shall include a reference to this Directive or shall be accompanied by such a reference at the time of their official publication. The manner in which such a reference is to be made shall be laid down by the Member States.