Every four years starting from the adoption of this Directive, the Commission shall present to the Council, on the basis of information obtained from the Member States, a report on the application of this Chapter, together, where appropriate and taking into account the need to ensure the long-term convergence of national regulations, with proposals on the following subjects:
improvements to the special scheme for small enterprises;
the adaptation of national systems as regards exemptions and graduated tax relief;
the adaptation of the ceilings provided for in Section 2.
The Council shall decide, in accordance with Article 93 of the Treaty, whether a special scheme for small enterprises is necessary under the definitive arrangements and, if appropriate, shall lay down the common limits and conditions for the implementation of that scheme.