(5)It is important to lay down detailed rules with a view to ensuring that the statutory audits of public-interest entities are of adequate quality and are carried out by statutory auditors and audit firms subject to stringent requirements. A common regulatory approach should enhance the integrity, independence, objectivity, responsibility, transparency and reliability of statutory auditors and audit firms carrying out statutory audits of public-interest entities, contributing to the quality of statutory audits in the Union, thus to the smooth functioning of the internal market, while achieving a high level of consumer and investor protection. The development of a separate act for public-interest entities should also ensure consistent harmonisation and uniform application of the rules and thus contribute to a more effective functioning of the internal market. These strict requirements should be applicable to statutory auditors and audit firms only insofar as they carry out statutory audits of public-interest entities.