The study highlighted the freedom of decision-making occurring in the law, under which the administrative authorities were given a certain freedom of action. This freedom is situated in the area of discretionary powers of public administration. It was formed in the evolution of administrative law. It was completely eliminated during the period of a police state. With this freedom, our legislator allowed the interpretation of vague phrases and general clauses. The aim of it is to ensure the efficiency of the authorities, but these bodies can not exceed the limit of legality of action and violate the principle of proportionality. This freedom of decision-making is connected with the proper selection of public administration staff because the inability to apply the provisions may lead to arbitrariness in the activities of the administration, or illegal activities.