(51)Since the objectives of this Directive cannot be sufficiently achieved by the Member States in view of the international nature of the Union equity market and action by Member States alone is likely to result in different sets of rules, which may undermine or create new obstacles to the functioning of the internal market, but can rather, by reason of their scale and effects, be better achieved at Union level, the Union may adopt measures, in accordance with the principle of subsidiarity as set out in Article 5 of the Treaty on European Union. 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 those objectives.