Episcopal polity Apostle. Currently the bishops of the Assyrian Church of the East continue to maintain its apostolic succession. Anglicanism is the most prominent of the Reformation traditions to lay claim to the historic episcopate through apostolic succession in terms comparable to the various Roman Catholic and Orthodox Communions. Anglicans assert unbroken episcopal succession in and through the Church of England back to St. Augustine of Canterbury and to the first century Roman province of Britannia. While some Celtic Christian practices were changed at the Synod of Whitby, the church in the British Isles was under papal authority from earliest times. The
Episcopal conference of episcopal conferences are currently governed by the 1983 Code of Canon Law (see especially canons 447-459) In addition, there are assemblies of bishops which include the bishops of different rites in a nation, both Eastern Catholic and Latin Catholic; these are described in canon 322 §2 of the Code of Canons of the Eastern Churches. The nature of episcopal conferences, and their magisterial authority in particular, was subsequently clarified by Pope John Paul II in his 1998 "motu proprio", "Apostolos suos", which stated that the declarations of such conferences "constitute authentic magisterium" when approved unanimously by the conference; otherwise