The freedom of movement for workers is a policy chapter of the acquis communautaire of the European Union. It is part of the free movement of persons and one of the four economic freedoms: free movement of goods, services, labour and capital. Article 45 TFEU (ex 39 and 48) states that:

The right to free movement has both 'horizontal' and 'vertical' direct effect, such that a private citizen can invoke the right, without more, in an ordinary court, against other persons, both governmental and non-governmental.