(31)Since the objective of this Directive, namely to reinforce investor confidence in the truth and fairness of the financial statements published by undertakings by further enhancing the quality of statutory audits that are performed within the Union, cannot be sufficiently achieved by Member States but can rather, by reason of its 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 that objective.