The Citizens’ Rights Directive 2004/38/EC (also sometimes called the "Free Movement Directive") defines the right of free movement for citizens of the European Economic Area (EEA), which includes the member states of the European Union (EU) and the three European Free Trade Association (EFTA) members Iceland, Norway and Liechtenstein.
The European Union (EU) is a political and economic union of EUnum member states that are located primarily in Europe.
European Union law is the system of laws operating within the member states of the European Union.
The freedom of movement for workers is a policy chapter of the acquis communautaire of the European Union.
A regulation is a legal act of the European Union that becomes immediately enforceable as law in all member states simultaneously.