Member States shall adopt the laws, regulations and administrative provisions necessary to comply with this Directive by 2 December 2003 at the latest or may entrust the social partners, at their joint request, with the implementation of this Directive as regards provisions concerning collective agreements. In such cases, Member States shall ensure that, no later than 2 December 2003, the social partners introduce the necessary measures by agreement, the Member States concerned 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.

 In order to take account of particular conditions, Member States may, if necessary, have an additional period of 3 years from 2 December 2003, that is to say a total of 6 years, to implement the provisions of this Directive on age and disability discrimination. In that event they shall inform the Commission forthwith. Any Member State which chooses to use this additional period shall report annually to the Commission on the steps it is taking to tackle age and disability discrimination and on the progress it is making towards implementation. The Commission shall report annually to the Council.

 When Member States adopt these measures, they shall contain a reference to this Directive or be accompanied by such reference on the occasion of their official publication. The methods of making such reference shall be laid down by Member States.