Codification conventions and draft articles completed by the International Law Commission are often-and increasingly-invoked by courts, tribunals, governments and international organizations as 'reflections of customary international law'. This article discusses the factors explaining the authority that these 'non-legislative codifications' have come to enjoy in international legal reasoning. Moving beyond the traditional explanations of codification conventions as evidence of State practice and ILC draft articles as the teaching of publicists, it considers how, against the backdrop of the uncertainty of customary international law, institutional factors (relating to authorship, representation and procedure) and textual factors (including prescriptive form and the absence of a distinction between 'codification' and 'progressive development') converge to convey the image that the resulting texts constitute the most authoritative restatement of the existing law. It then assesses this phenomenon in light of the political ideal of the international rule of law. While non-legislative codifications contribute to enhancing the clarity, consistency and congruence of international law, the fact that they may portray novel rules as reflecting existing law inevitably raises legality concerns.
To what extent do rules of general international law apply between international organizations and their members? The article tackles this question by distinguishing between two categories of relations: those that take place on the international plane and those that are, rather, situated on the institutional plane constituted by the organization’s internal law. I argue that general international law applies by default to relations belonging to the first category, only being displaced when the internal law of an organization contains applicable lex specialis, but that it cannot claim a similar role at the level of internal institutional relations. The question there becomes one concerning the dialogue between relatively autonomous international legal orders, so that it is the internal law of each organization that defines the terms on which rules of international law are allowed in. At the same time, a normative argument can be made for a ‘monistic presumption’ for the application of general international law in cases where the rules of the organization are silent. By delving into such questions of applicable law and identifying the relevant analytical frameworks, the article aims to help international lawyers dealing with complex disputes opposing international organizations and their members to structure the legal analysis.
The present column covers procedural developments at the International Court of Justice in the period spanning from 1 June 2014 to 30 June 2015. These include: the scope of the Court’s jurisdiction ratione temporis under a compromissory clause in the context of State succession; the admissibility of new arguments presented during oral hearings; the burden, standard and methods of proof in cases involving State responsibility for international crimes; and revocation of provisional measures in light of a change in the situation that warranted them.
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