THE HAGUE — The issuance of arrest warrants by the International Criminal Court (ICC) against sitting heads of state and senior cabinet officials has highlighted structural tensions between treaty-based international criminal jurisdiction and customary immunities.
The operational conflict centers on the statutory relationship between Articles 27 and 98 of the Rome Statute.
1. Statutory Friction: Article 27 vs. Article 98(1)
The Rome Statute contains two provisions that come into tension when non-party state officials are involved:
- Article 27(2): Immunities or special procedural rules attached to official capacity, whether under national or international law, do not bar the Court from exercising jurisdiction.
- Article 98(1): The Court may not proceed with a request for surrender or assistance if doing so would require the requested state to act inconsistently with its obligations under international law regarding state or diplomatic immunity of a third state, unless a waiver is obtained.
When an arrest warrant is issued against a sitting official of a state not party to the Rome Statute, requested states face competing legal considerations: their Part 9 treaty obligation to cooperate with the Court, and customary obligations protecting sitting foreign ministers and heads of state from foreign arrest (immunity ratione personae).
2. The Appeals Chamber Jurisprudence: The Jordan Referral
In the Al-Bashir (Jordan Referral) judgment, the ICC Appeals Chamber addressed this tension on two grounds:
- Customary Law Before International Courts: The Chamber concluded that no head-of-state immunity exists under customary international law before an international criminal court.
- The Horizontal vs. Vertical Distinction: The Chamber held that when a state party executes an arrest warrant at the request of the ICC, it acts on behalf of the international jurisdiction rather than exercising municipal sovereign authority, displacing horizontal bilateral immunities.
Non-party states and legal commentators continue to argue that this interpretation conflates a court’s jurisdiction over an individual with a third state’s sovereign obligation to execute an arrest on domestic territory, implicating the rule codified in Article 34 of the Vienna Convention on the Law of Treaties that treaties cannot bind third states without their consent (pacta tertiis).