Article 3
Member States shall bring into force the laws, regulations and administrative provisions necessary to comply with this Directive not later than 1 December 2003 or shall ensure that, by that date at the latest, management and labour have introduced the necessary measures by agreement. The Member States shall take any necessary measure to enable them at any time to be in a position to guarantee the results imposed by this Directive. They shall forthwith inform the Commission thereof. When Member States adopt these measures, they shall contain a reference to this Directive or be accompanied by such a reference on the occasion of their official publication. The methods of making such a reference shall be laid down by the Member States.