International criminal law — International Criminal Court (“ICC”) — Rome Statute, Articles 27, 87 and 98 — Duty of cooperation of States parties in enforcing warrant of arrest — Situation in Darfur — Referral to the ICC by the Security Council of the United Nations — Warrant of arrest for Head of State of State not party to Rome Statute — Whether entitled to immunity before ICC — Whether entitled to immunity before national authorities

State immunity — Head of State — Immunity from criminal proceedings — Whether extending to proceedings before international court — International Criminal Court — Whether Head of State of State not party to Rome Statute entitled to immunity — Obligations of States parties to Rome Statute to cooperate in enforcing warrant of arrest