A. The area of freedom, security and justice and the role of the Court of Justice
One of the subjects which has aroused particular interest in the study of the ‘area of freedom, security and justice’ introduced by the Treaty of Amsterdam as an objective of the European Union (EU) inherent in the principle of the free movement of persons (see the preamble to, and Article 2, the Treaty on EU) is the role of the European Court of Justice (Court). The interest is both theoretical and practical, because one of the main issues is the Court's jurisdiction to give preliminary rulings and thus relations between national and Community courts and the protection of the interests of individuals before national courts wherever there is a conflict between national and Community law and thus a question of interpretation of Community law arises in national proceedings. The Treaty of Nice, which came into force on 1 February 2003, altered the jurisdiction and organisation of the Community judicature and therefore affected the ‘area of freedom, security and justice’.1