The ontological development of law in the metaphysical sphere ends with the categories that are a subject of a separate part of the philosophy of law. The categories of constitutional law represent the beginning of ontological development in the empirical, positive sphere. Like certain categories pertaining to the separate part of the philosophy of law, which constitute a consistent logical system, all the categories of the constitutional law have to be in the same, logically consistent harmony. The constitutions were not based on the logical, consistent structure in the former legal practice. They were based on a tradition that made a common collection (catalogue) of the constitutional rights. A distinction between constitutional law and all other areas of positive law has to be clearly set. The constitutional law is made of constitutional principles, which do not have normative character, and which are the outcome of the proof of truth, while the remaining area of the positive law has normative character and is the outcome of legitimacy rule of reasoning.