(3)In accordance with the Treaty on the Functioning of the European Union (TFEU), the internal market comprises an area without internal frontiers in which the free movement of goods and services and the freedom of establishment are ensured. It is necessary to enable statutory auditors and audit firms to develop their statutory audit service activities within the Union by making it possible for them to provide such services in a Member State other than that in which they were approved. Enabling statutory auditors and audit firms to provide statutory audits under their home-country professional titles in a host Member State addresses, in particular, the needs of groups of undertakings which, owing to the increasing trade flows resulting from the internal market, draw up financial statements in several Member States and are required to have them audited under Union law. The elimination of barriers to the development of statutory audit services between Member States would contribute to the integration of the Union audit market.