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Part III Observance and Application of Treaties, 14 Treaties Establishing Objective Regimes

Francesco Salerno

From: The Law of Treaties Beyond the Vienna Convention

Edited By: Enzo Cannizzaro

From: Oxford Public International Law (http://opil.ouplaw.com). (c) Oxford University Press, 2023. All Rights Reserved.date: 30 November 2023

Object & purpose (treaty interpretation and) — UN Charter — Treaties, effect for third states — Vienna Convention on the Law of Treaties — Erga omnes obligations

The issue of treaties establishing objective regimes has been neglected by the Vienna Convention on the Law of Treaties. Building on the principle of relativity of treaties, the Convention only deals with the effects of specific treaty rules on third states. This chapter argues that third states never acquire the same status of states parties, even when they consent to the specific treaty rules that affect them. Analysing the significance of treaties establishing objective regimes under general international law, it clarifies that such treaties may affect third states even when they do not embody rules of customary law. Due to the relevance for the international legal order of the unique erga omnes regime created by the treaty, the situation regulated by it can no longer fall within the scope of the absolute ‘freedom’ previously accorded to third states.

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