Bentuk luar biasa Ritus Roma

Art 1. The Roman Missal promulgated by Pope Paul VI is the ordinary expression of the "lex orandi" (rule of prayer) of the Catholic Church of the Latin rite. The Roman Missal promulgated by Saint Pius V and revised by Saint John XXIII is nonetheless to be considered an extraordinary expression of the same "lex orandi" of the Church and duly honoured for its venerable and ancient usage. These two expressions of the Church's "lex orandi" will in no way lead to a division in the Church's "lex credendi" (rule of faith); for they are two usages of the one Roman rite.