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Subsequent Practice in the Whaling Case, and What the ICJ Implies about Treaty Interpretation in International Organizations

Today the ICJ delivered its long-anticipated judgment in the Whaling Case (Australia v. Japan: New Zealand Intervening), finding Japan’s whaling program in breach of the Whaling Convention on several counts. It is a rich judgment, which will be more fully digested over the next few days. In this post I want to draw attention to one specific point on the ICJ’s approach to the interpreting the Whaling Convention – specifically the Court’s approach to subsequent agreement and practice in relation to its prior advisory jurisprudence on the interpretation of the U.N. Charter. The relevant aspect of the Whaling Judgment concerns the Court’s assessment of the weight of resolutions issued by the International Whaling Commission (IWC). The IWC is a supervisory body established by the Whaling Convention. It has the capacity to amend certain provisions of the Convention by three-fourths majority vote (though amendments will not bind any State Party that objects). It can also render non-binding recommendations. The Court indicates at the outset that while such resolutions are non-binding, when “they…

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ICJ Decides the Whaling in the Antarctic Case: Australia Wins

This morning the ICJ delivered its judgment in the case concerning Whaling in the Antarctic (Australia v. Japan: New Zealand intervening). Australia won on almost all counts, and by 12 votes to 4. The Court’s principal reasoning is that while Japan’s whaling programme involved ‘scientific research,’ a concept that the Court did not want to define with particular precision,…

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