EN
The European Commission oversees the implementation of the treaties and funds that institutions accept on their basis, as well as supervises the implementation of the EU law under the control of the Court of Justice of the European Union. One of the most important tools that the Commission has at its disposal to force the Member States to comply with the European law is the contravention procedure. In his article, the author describes the mechanisms that provide for the effectiveness of the system for the implementation of the Community law and he presents the three stages of the contravention procedure: the informal proceedings, the formal administrative stage, and the court stage.