Episcopal polity conferences or synods. Their leadership is both sacramental and constitutional; as well as performing ordinations, confirmations, and consecrations, the bishop supervises the clergy within a local jurisdiction and is the representative both to secular structures and within the hierarchy of the church. Bishops are considered to derive their authority from an unbroken, personal apostolic succession from the Twelve Apostles of Jesus. Bishops with such authority are said to represent the historical episcopate or historic episcopate. Churches with this type of government usually believe that the Church requires episcopal government as described in the New Testament (see 1 Timothy 3 and
Episcopal conference the conference must achieve a two-thirds majority and seek the "recognitio", that is, recognition of approval, of the Holy See, which they will not receive if the majority "is not substantial". In the 2013 apostolic exhortation, "Evangelii Gaudium", Pope Francis expressed his concern that the intent of the Second Vatican Council, which would give episcopal conferences "genuine doctrinal authority, has not yet been sufficiently elaborated." On September 9, 2017, Pope Francis modified canon law, granting episcopal conferences specific authority "to faithfully prepare … approve and publish the liturgical books for the regions for which they are responsible after the confirmation