(5)Common minimum standards ensuring that whistleblowers are protected effectively should apply as regards acts and policy areas where there is a need to strengthen enforcement, under-reporting by whistleblowers is a key factor affecting enforcement, and breaches of Union law can cause serious harm to the public interest. Member States could decide to extend the application of national provisions to other areas with a view to ensuring that there is a comprehensive and coherent whistleblower protection framework at national level.