Nigeria, a Commonwealth member, was admitted to the UN on 7 October 1960, and since that time has become affiliated with ECA and all the nonregional specialized agencies. It is also a member of G-77 and the African Union, and is a signatory of the Law of the Sea and a member of the WTO.
Nigeria joined OPEC in June 1971 and became a signatory to the Lomé Convention among African, Caribbean, and Pacific countries. Nigeria signed an agreement with the EEC in February 1975, giving Nigeria free access to EEC markets and concessionary loan and industrial cooperation privileges in exchange for most-favored-nation status for EEC members. In May 1975 Nigeria signed an agreement setting up ECOWAS. Among the regional organizations of which Nigeria is a member are the Niger Basin Authority and the Lake Chad Basin Commission.