This article proposes four amendments to Kelsen's theory of the source of Law. The general idea is to demonstrate that the structure of a legal system cannot be understood without Hart's secondary rules. These rules let the Law to be a system of norms coordinated among them, contrary to Kelsen's pyramidal representation. Accordingly, Raz' three diagram is much more useful to graphic the relations among the sources of Law than the pyramidal model.... [Leer más...]