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.

国际组织之间的互动是全球治理中无处不在且多方面的现象，而劳动治理是一个重要的参考领域。这种组织间的交互（定义为IO之间的预期或偶然影响）会极大地影响交互IO执行其各自任务的方式。根据情况，组织间的互动可以增加IO的影响范围和影响力，但它们也可能稀释，转移或阻碍其活动和功能。

在这种背景下，令人惊讶的是，迄今为止，国际法律学术界对组织间互动的法律层面表现出很少的兴趣。结果，管辖这种相互作用的法律的许多中心方面仍然晦涩难懂。本文认为，国际律师有必要以系统的方式研究组织间互动的现象和法律含义。本文以国际劳工组织与联合国，国际海事组织，世界银行和欧洲人权法院之间的互动为例，探讨了组织间互动的现象，并推断了这些互动的多样性，影响和规范性歧义。 ，并对它们发展出法律上的学术观点。在这样做，