La rilevanza internazionale delle norme interne sulla competenza a denunciare i trattati internazionali

This article surveys the relationship between constitutional and international law concerning the competence to denounce treaties with the aim to discuss whether the circumvention of the prerogatives of Parliaments may impact on the validity of the treaty between contracting States. To this purpose, after examining how this question is regulated by national legal orders and, particularly by the Italian Constitution, it analyses the pertinent international rules, even in the light of the recent tendency of transnational jurisprudence and practice. Noting that the article 46 of the Vienna Convention on the law of treaties establishes the invalidity of treaties as a consequence of violations of constitutional rules on the competence to participate to treaties, the article critically discusses the applicability of the same provision to the corresponding eventuality of violations of constitutional rules on the competence to denounce treaties. It then suggests the need to interpret extensively the articles 65, para. 2, and 68 of the Vienna Convention on the law of treaties in order to favour the revocability of the withdrawal from a treaty, when it was declared by circumventing the prerogatives of Parliaments