The concept of public policy as a legal concept is quite complicated, much debated concept of jurisprudence, it is reflected in several laws of the Schengen acquis and in the case law. Due to interpretation problems the attempts to proportionate balance in public order interests ensuring free movement of persons in the European Union space have become the subject of a number of judicial precedents in both separate Schengen Member States as well as throughout the European Union. An important step in conflict resolution is the concept and terminology analysis and unification, which in the legal framework of the Schengen acquis must be initiated by defining the basic concept s such as „public order”, „national security”, „threats to public hea...