1. Member States shall adopt by 20 September 2003 at the latest the laws, regulations and administrative provisions necessary to comply with 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.
2. Member States shall provide that the measures referred to in paragraph 1 shall first apply to the supervision of accounts for financial years beginning on 1 January 2004 or during that calendar year.
3. Member States shall communicate to the Commission the main provisions of national law which they adopt in the field covered by this Directive.
4. Not later than 1 January 2007 the Commission shall submit to the European Parliament and the Council a report on the application of this Directive and, if necessary, on the need for fu
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