The Republic of Croatia is a legal state, which means that within it there are certain rights that must be respected, and they exist not only in order to limit the power of the state government, but also for citizens themselves, to help them know how to behave. The Constitution of the Republic of Croatia stipulates that the government in the Republic of Croatia is established on the principle of the separation of powers into legislative, executive and judiciary power, and is limited by the citizens constitutional rights to local and regional self-government. Development of regional self-government is one of the characteristics of the democracy itself, and legal state as well. The European Union is a unique supranational community of European states, created as a process of integration and cooperation of six countries. The Republic of Croatia becomes a full member of the European Union on July 1, 2013. and thus accepts the acquis. The acquis is a name that refers to the entire body of common rights and obligations that are binding on all EU countries, as EU Members. The European Council is an international organization whose main aims are to strengthen democracy, and to uphold human rights and rule of law in Europe. Member States of the Council of Europe are the signatories of the Charter of Regional Self-Government, which is of extreme legal importance for the Croatian legal system.