CCC 1209
Christian Mystery›SECTION ONE THE SACRAMENTAL ECONOMY›CHAPTER TWO THE SACRAMENTAL CELEBRATION OF THE PASCHAL MYSTERY›IN BRIEF
The criterion that assures unity amid the diversity of liturgical traditions is fidelity to apostolic Tradition, i e., the communion in the faith and the sacraments received from the apostles, a communion that is both signified and guaranteed by apostolic succession.