jats:titleAbstract</jats:title>jats:pThis article argues that it is important for the International Court of Justice to be given an opportunity, for instance through a request for an Advisory Opinion, to explain what exactly it meant when it suggested that the ordinarily applicable international law on immunities need not be an obstacle “before certain international criminal courts, where they have jurisdiction”. Two international criminal courts have built a structure of case law on this one obiter comment, which it seems unable to support.</jats:p>