Admitted to UN membership on 12 November 1956, Tunisia belongs to ECA and all the nonregional specialized agencies. The nation also participates in the African Development Bank, G-77, and African Union, and is a signatory of the Law of the Sea and a member of the WTO. Tunisia joined the Arab League on 1 October 1958 but boycotted its meetings from 1958 to 1961, and again in 1966; its headquarters were transferred from Cairo to Tunis in 1979 after Egypt signed a peace treaty with Israel. Egypt was readmitted to the Arab League in 1989, and the League's headquarters were moved back to Cairo. Tunisia is a member of the Maghreb Permanent Consultative Committee.