
The Russian-Ukrainian armed conflict has activated several initiatives to collect evidence of the international crimes committed during the conflict and to guarantee individual criminal responsibility of their perpetrators. Despite their extraordinary intensity, these processes do not make it possible to try the perpetrators of crimes of aggression.
Indeed, the jurisdiction of the International Criminal Court in this regard relates only to crimes committed by nationals of a State Party to the Statute in the territory of another
State Party. In contrast, the exercise of jurisdiction by the national courts of third states may suffer from several potential limitations. In this situation, Ukraine has launched a campaign to establish a special tribunal for crimes of aggression against Ukraine (STAU). The article outlines this initiative and the legal issues that would need to be resolved if it were to be implemented. Options for the establishment of the STAU are analyzed, taking into account
two main possibilities – establishment based on an interstate multilateral treaty and establishment in cooperation with an international organization (e.g. UN, EU, Council of Europe). The immunity of state representatives from foreign criminal jurisdiction and the applicable circumstances precluding wrongfulness is also discussed in this context.