This commentary investigates the practical application and legal interpretation of the Treaty on European Union (TEU), the Treaty on the Functioning of the European Union (TFEU), and the Charter of Fundamental Rights. The authors, a collaborative group of legal experts from the European Commission and academia, provide a structured analytical framework to bridge the gap between treaty text and judicial practice. By synthesizing case law and legislative history, the work serves as a comprehensive reference for navigating the complex regulatory architecture of the European Union.

Legal practitioners and academics frequently cite this work as a reliable, high-density reference for daily application of EU law. Experts highlight the text as a foundational resource for those requiring rapid access to the intersection of treaty provisions and current judicial practice.