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EJIL Debate. The Whaling case and the Duty to Cooperate: Responding to Professors Thirlway and d’Aspremont

Published on January 17, 2018        Author: 

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I am puzzled by the very terms of the debate between Professors Thirlway and d’Aspremont for several reasons. First, there is a considerable ambiguity in both Japan’s argument and the Court’s position as to the legal effects yielded by the IWC resolutions. Hence, it is inevitable to have a variation of interpretations. Second, I believe that the determination of the implications of the judgment should not be made dependent on an “objectivised” subjective intention of the Parties or the Court — a task which is no work for legal scholars anyway.

Yet, my main source of puzzlement lies elsewhere. While the focus of Thirlway and d’Aspremont’s debate is on the Court’s position on Article 31 of the VCLT with regards to Japan’s non-assertion to the resolution, I submit that the most ground-breaking part of the judgment is that the Court brought back the legal effect of the resolutions from the backdoor, that is via the concept of ‘the duty to cooperate’. In this post, I would like to draw the attention of the readers to the unique characteristic of the duty to cooperate referred to in the Whaling case, and the possible necessity for a new conceptual framework. In particular, I argue, neither the logic of sources nor the logic of interpretation can sufficiently explain what the Court did with the duty of to cooperate. Read the rest of this entry…