The fact that our country belongs to the European Union, an integration organization of such an advanced character and multilevel construction, necessitates deeper insight into the issue of our political system. As Poland is a new member state, it is currently “learning how to participate” in the integration process, which refers both to its authorities and society. However, it is not an easy task because the Union is the most structurally advanced international organisation in the world, with unique construction and methods of operation, which develops the framework for legal mechanisms finding no direct analogy in national systems. One of these mechanisms is the fact that judicature of an international court, i.e. the Court of Justice, is constantly used for executing current internal tasks of the state. It seems justifiable to note that the Court’s judicature is becoming a factor which may and should be taken into consideration in the policy decision-making process in the Republic of Poland. Thus, we should widely inform about the consequences of the fact that the Court of Justice has become an immanent part of the Polish system.