Anthea Roberts puts the argument of my book into broader international law perspective by asking three questions. First, she wonders whether there might be a need to reformulate the criteria of customary law to make them more realistic. Secondly, she gently chides me for being too hasty in dismissing domestic public law arguments. Thirdly, she is interested in the politics of the human rights analogy of investment law. I will first say a few words about human rights analogies and customary law, and then explain my position regarding domestic public law.
Human Rights Analogies
In a recent article (‘Investment Treaty Arbitration and the (New) Law of State Responsibility’ (2013) 24 EJIL 617) and in a forthcoming chapter I also address the analogical reasoning in investment law, looking at particular case studies in the law of State responsibility and law of treaties from different perspectives, including that of human rights law. It seems to me that the major conceptual objection (and here I quote from the chapter, footnotes omitted)
is that the human rights analogy fails to capture the structural dynamic of the investment protection regime. In particular, the grant of legal protection to investors is explicitly linked with and justified by utilitarian considerations of enticing the non-State actor to make the rational choice of engaging in an investment activity and therefore benefiting from protection. The proposition that there might be a rational choice to be made to become human so as to benefit from human rights protection strikes one as patently absurd from the perspective of human rights law; conversely, in investment protection law, the question of whether, when, and how a claimant becomes an investor is an important yet conceptually unremarkable jurisdictional box to be ticked in every dispute.
The idea of choice – and with it, an analogy with the consent-based law of treaties on third parties, rather than human rights – provides a powerful analytical perspective for examining different approaches in the law of treaties and State responsibility. It is less obvious that differences in teleology and structure between human rights and investment law pose similar challenges to arguments by analogy regarding primary obligations, where peculiarities of either regime may be appropriately incorporated in the process of comparative reasoning regarding particular rules. Read the rest of this entry…