European Union Law - Constitutional Law

Constitutional Law

There are three sources of European Union law: primary law, secondary law and supplementary law. The main sources of primary law are the Treaties establishing the European Union (TEU). Secondary sources are legal instruments based on the Treaties as well as unilateral secondary law and conventions and agreements. Supplementary sources are laws which are not provided for by the TEU, including case law by the Court of Justice of the European Union, international law and general principles of European Union law.