(108)Since the objective of this Directive, namely to strengthen enforcement in certain policy areas and as regards acts where breaches of Union law can cause serious harm to the public interest, through effective whistleblower protection, cannot be sufficiently achieved by the Member States acting alone or in an uncoordinated manner, but can rather be better achieved at Union level by laying down common minimum standards for whistleblower protection, and given that only Union action can provide coherence and align the existing Union rules on whistleblower protection, 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.