The Genocide Convention states that persons charged with the crime may be prosecuted ’by such international penal tribunal as may have jurisdiction with respect to those Contracting Parties which shall have accepted its jurisdiction’. At the time no such institution existed. The International Court of Justice held that the ad hoc tribunals established by the Security Council could be deemed to be such an international penal tribunal. They undertook a large number of genocide prosecutions. The International Criminal Court, established in 2002, constitutes such an international tribunal. It has only issued a single arrest warrant for genocide, against the former president of Sudan.