Member States\u27 Due Diligence Obligations to Supervise International Organizations

There are two reasons to consider member states’ obligations to supervise international organisations as a distinct category of due diligence obligations. First, due diligence obligations typically require states to regulate third parties in some way. But it is harder for states to regulate international organisations than other private actors because international law protects the autonomy of international organisations. Second, such due diligence obligations merit attention because they may compensate for the dearth of mechanisms to hold international organisations accountable when they cause harm. This chapter canvasses member states’ existing obligations vis-à-vis international organisations, and argues in particular that the International Law Commission (ILC) missed an opportunity to frame broader obligations when drafting the Articles on the Responsibility of International Organizations (the ARIO). The chapter closes by making the normative case for establishing a due diligence obligation on member states to ensure that international organisations do not abuse their immunities