This restriction was introduced in paragraph 6, article 4 of Traditionis Custodes, issued by Pope Francis in July 2021.
“After all the necessary consultations, I decided this because I saw that the good pastoral measures put in place by John Paul II and Benedict XVI were being used in an ideological way, to go backward. It was necessary to stop this ‘indietrismo,’ which was not in the pastoral vision of my predecessors,” the pope told the group of 32 Jesuits in Hungary.
Through the motu proprio Traditionis Custodes, Pope Francis placed sweeping restrictions on the celebration of Mass using the 1962 Roman Missal, known variously as the extraordinary form of the Roman rite, the Tridentine Mass, and the Traditional Latin Mass.
Francis’ predecessor Pope Benedict XVI had issued a 2007 apostolic letter called Summorum Pontificum, which acknowledged the right of all priests to say Mass using the Roman Missal of 1962.
Francis’ comments on the celebration of the Latin Mass were prompted by a question about reconciling the Church and the modern world, as discussed at the Second Vatican Council.
The pope said: “I wouldn’t know how to answer that theoretically, but I certainly know that the Council is still being applied. It takes a century for a Council to be assimilated, they say.”