p. 21811. Normative Interactions: Implementation and Hierarchy of Norms
- Paola Gaeta, Paola GaetaProfessor of International Law, The Graduate Institute, Geneva
- Jorge E. ViñualesJorge E. ViñualesHarold Samuel Professor of Law and Environmental Policy, University of Cambridge
- , and Salvatore ZappalàSalvatore ZappalàProfessor of International Law, University of Catania
Abstract
This chapter deals with some fundamental realities of international law as a body of legal rules which traditionally requires implementation at domestic level through transposal. In so doing it discusses the traditional theoretical distinction between monism and dualism, as abstract approaches to the relationship between domestic and international legal order. It then tackles the issue of the effects (including direct effects) that international law may have in concrete situations within national systems, as a consequence of, or, in some instances even irrespective of, transposal through national legislation. Thirdly, the chapter discusses the ‘verticalization’ of the international legal order with the affirmation in the second half of the twentieth century of the notion of jus cogens (or peremptory norms) and the effects this has (or might have) within international law and in its relationships with municipal laws.
