In the Republic of Croatia, changes in administrative disputes occur under the influence of a comprehensive process of Europeanization. Member States are required to align their national legislation with the European acquis. The Republic of Croatia had to make changes due to the process of Europeanization in order to join the European Union, since one of the 35 negotiating chapters refers to the judiciary and fundamental human rights. The Republic of Croatia made significant changes in this direction 10 years ago with the adoption of the new ZUS in 2010. With the introduction of new legal institutes in the content of the law itself, the preconditions for the realization of a new, more modern system of administrative justice have been met, but the conditions for better judicial protection of citizens from administrative proceedings have also been met. The most important change brought by the new law concerns specifically the expansion of the subject matter of the administrative dispute, so that according to the new legislation that came into force in 2012, it is treated as a dispute of full jurisdiction. In accordance with the above, the four newly established first-instance administrative courts have a much greater scope of powers in resolving administrative disputes in the new legislation.