The organ of the UNO responsible for the affairs of the mandated territories was the

The organ of the United Nations Organization (UNO) responsible for the affairs of the mandated territories was the Trusteeship Council. The Trusteeship Council was established under the authority of the UN Charter to ensure that territories that were not self-governing at the time were administered in the best interests of their inhabitants and to promote their development towards self-government or independence. The Trusteeship Council was responsible for supervising the administration of Trust Territories, which were territories that were placed under the trusteeship system by the UN. It was also responsible for promoting the economic, social, educational, and cultural development of the people in the territories. The Trusteeship Council suspended its operations in 1994 after all the trust territories had achieved self-government or independence.