(27)Since the objective of this Directive cannot be sufficiently achieved by the Member States because it requires the harmonisation of many different rules currently existing in the legal systems of the various Member States and can therefore be better achieved at Community level, the Community may adopt measures, in accordance with the principle of subsidiarity as set out in Article 5 of the Treaty. In accordance with the principle of proportionality, as set out in that Article, this Directive does not go beyond what is necessary in order to achieve that objective.