Scerni, Mario Keywords: States | Sea | Competence | Mots clefs: Etats | Espace maritime | Compétence | ABSTRACT Mario Scerni thus defines the subject of his course: the Maritime Areas and the Power of the States. It consists of the critical examination of rules in 1968, which govern the different areas of the sea. The waters of the sea, which draw so much maritime areas, are the internal waters, the territorial sea, the contiguous area, the adjacent sea, and finally the high sea. The author proceeds to the study of these different areas. Mario Scerni définit ainsi l'objet de son cours : …