The decision-making process of the Constitutional Court of the Republic of Slovenia is regulated and directed by legal rules and principles provided for in the Constitution of the Republic of Slovenia, legal acts, and international legal sources. Like in any legal proceeding, the fundamental constitutional procedural guarantees and specific principles of constitutional decisions apply in proceedings before the Constitutional Court. The Court has a specific constitutional position, which is why some specificities can be observed in the principles of publicity, independence and objectivity, the adversarial principle, and the principle of collegiate decision-making. In addition, some of the typical procedural guarantees do not apply before the Constitutional Court. Proceedings before the Constitutional Court are usually initiated in line with the principle that the parties delimit the subject matter of the proceedings, while the Court has the option to initiate the proceeding in line with the principle of connection. However, the most important principle in the decision-making process is the principle of proportionality, which is used for considering the constitutionality of interferences with human rights and fundamental freedoms. As for the principle of legal interest, it stipulates who can provide an initiative for starting the process of reviewing constitutionality and legality.