1. Member States shall adopt not later than 5 June 2000 the laws, regulations and administrative provisions necessary to comply with this Directive. They shall immediately inform the Commission thereof.
2. Member States shall provide that the provisions referred to in paragraph 1 shall first apply to the supervision of accounts for financial years beginning on 1 January 2001 or during that calendar year.
3. When Member States adopt the measures referred to in paragraph 1, they shall contain a reference to this Directive or shall 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.
4. Member States shall communicate to the Commission the main provisions of national law which they adopt in the field covered by this Directive.
5. Not later than 1 January 2006 the Commission shall issue a report on the application of this Directive and, if necessary, on the need for further harmonisati