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Abstract

The establishment, under international law, of the proper interpretive approach to broadly phrased waivers of sovereign immunity from execution is an unsettled issue, which was not addressed in legal theory or practice until recently. However, this issue became practically relevant in the wake of certain hedge funds’ strategy to seek the collection of defaulted sovereign debt in any available jurisdiction. Most important in this respect are the recent judgments of the French Court of Cassation in NML v. Argentine Republic, where the Court held, in fact, that, under customary international law, waivers of execution immunity may not extend to a particular category of state assets, unless expressly referred to. The present article examines the accuracy of the Court’s proposition in light of the major parameters for the determination of the relevant standards of interpretation: the 2004 UN Convention on Jurisdictional Immunities of States and Their Property as well as the pre-existing state practice, i.e. the settled case law regarding the interpretation of general immunity waivers in light of the diplomatic and consular law principle “ne impediatur legatio”, and the submission of execution immunity waivers to certain restrictions under domestic statutes. The authors take the view that the interpretive criteria of the Vienna Convention on the Law of Treaties are applicable by analogy to immunity waivers inserted in government bonds, leading to the adoption of a rather narrow approach. It is further suggested that, under the well-established principle that the plaintiff bears the burden of proof with respect to any exception to execution immunity, the “asset specificity” requirement may reasonably be seen as the allocation of the risk of ambiguity of immunity waivers to the judgment creditor. Finally, the authors argue that the restrictive interpretation of general immunity waivers may serve as a functional substitute for lacking clear-cut international law rules on state insolvency, insofar as no international law rule protecting good faith restructuring procedures from the speculative tactics of vulture funds is yet in force.