A group of traditionalist Catholics was thus accommodated fully within the Catholic Church. They accept the authority of the Pope as Vicar of Christ and Shepherd of the Church, the legitimacy of the Second Vatican Council and the validity of the Mass approved by Pope Paul VI. The clergy of the apostolic administration possess the faculty to celebrate in Latin the Mass, the sacraments and all other sacramental rites in the form codified by Pope Pius V and modified by his successors down to Pope John XXIII.