1. The Member States shall adopt the laws, regulations and administrative provisions necessary for their compliance with this Directive not later than 31 December 1993 and bring them into force no later than 1 July 1994. They shall forthwith inform the Commission thereof.
When they adopt such measures the Member States shall include references to this Directive or shall make such references when they effect official publication. The manner in which such references are to be made shall be laid down by the Member States.
2. The 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.