Burundi was admitted to UN membership on 18 September 1962 and is a member of ECA and all the nonregional specialized agencies except IAEA and IMO. It also belongs to the African Development Bank, G-77, and AU and is a signatory to the Law of the Sea and a member of the WTO. Burundi, Rwanda, and the DROC form the Economic Community of the Great Lakes Countries, which is intended to foster development in the region of lakes Kivu and Tanganyika. Burundi also cooperates with Rwanda and Tanzania in the development of the Kagera River Basin. In addition, Burundi is a member of the 15-nation Preferential Trade Area of Eastern and Southern Africa, and the organization's Trade Development Bank is in Bujumbura.