The League oversaw the Permanent Court of International Justice and several other agencies and commissions created to deal with pressing international problems. These included the Disarmament Commission, the International Labour Organization (ILO), the Mandates Commission, the International Commission on Intellectual Cooperation (precursor to UNESCO), the Permanent Central Opium Board, the Commission for Refugees, and the Slavery Commission. Three of these institutions were transferred to the United Nations after the Second World War: the International Labour Organization, the Permanent Court of International Justice (as the International Court of Justice), and the Health Organisation (restructured as the World Health Organization).