The Church of South India is the result of the union of churches of varying traditions Anglican, Methodist, Congregational, Presbyterian, and Reformed. It was inaugurated in September 1947, after protracted negotiation among the churches concerned. Organized into 22 dioceses, each under the spiritual supervision of a bishop, the church as a whole is governed by a synod, which elects a moderator (presiding bishop) every 2 years. Episcopacy is thus combined with Synodical government, and the church explicitly recognizes that Episcopal, Presbyterian, and congregational elements are all necessary for the church's life. The Scriptures are the ultimate standard of faith and practice. The historic creeds are accepted as interpreting the biblical faith, and the sacraments of baptism and the Lord's Supper are recognized as of binding obligation.