Article 2
Member States shall bring into force the laws, regulations and administrative provisions necessary to comply with this Directive by 10 July 1999, or shall ensure that, by that date at the latest, management and labour have introduced the necessary measures by agreement, the Member States being required to take any necessary measures 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. Member States may have a maximum of one more year, if necessary, and following consultation with management and labour, to take account of special difficulties or implementation by a collective agreement. They shall inform the Commission forthwith in such circumstances. When Member States adopt the provisions referred to in the first paragraph, these shall contain a reference to this Directive or shall be accompanied by such reference at the time of their official publication. The procedure for such reference shall be adopted by the Member States.