The DROC was admitted to membership in the UN on 20 September 1960. It is a member of ECA and all the nonregional specialized agencies and is a member of the WTO and signatory of the Law of the Sea. The DROC is also a member of the African Development Bank, G-77, and the AU. It joined OCAM, the organization of Francophonic African states, in 1964, but withdrew in 1972. The DROC is a member of the International Council of Copper Exporting Countries. The DROC, Rwanda, and Burundi form the Economic Community of the Great Lakes Countries.