Interactions between international organizations (‘IOs’) are a ubiquitous and multifaceted phenomenon in global governance, with labour governance being an important field of reference. Such inter-organizational interactions, defined as intended or accidental influence between IOs, can considerably affect the way in which the interacting IOs execute their respective mandates. Depending on the situation, inter-organizational interactions can increase IOs’ outreach and impact, but they can also dilute, divert or thwart their activities and their functioning.
Against this background, it is surprising that international legal scholarship has so far shown little interest in the legal dimensions of inter-organizational interactions. In consequence, many central aspects of the law governing such interactions still lay obscure. This article argues that there is a need for international lawyers to examine the phenomenon and the legal implications of inter-organizational interactions in a systematic manner. Using interactions between the International Labour Organization and the UN, the International Maritime Organization, the World Bank and the European Court of Human Rights as examples, this article explores the phenomenon of inter-organizational interactions, extrapolates these interactions’ variety, impact and normative ambivalence, and develops a legal scholarly perspective on them. In doing so, the article expounds the research agenda for a systematic legal analysis of inter-organizational interactions in labour governance and beyond.