 It also allows what some traditionalists would call novelties, such as proclaiming the Scripture readings in the vernacular language in Masses celebrated in the presence of the people (article 6).Before this motu proprio was issued, traditionalist Catholic groups, the largest of which is the Society of St. Pius X, which, even if not in formal schism, is in a situation of separation from the Church headed by the Holy See, claimed that no special authorization was required to celebrate the Tridentine Mass even publicly.They interpreted Pope Pius V's 1570 bull "Quo primum" as saying that the Tridentine Mass may be said in perpetuity.