Until then, priests who have been celebrating the Liturgy according to the Roman Missal of 1962 should know that in accord with Tradiciones custodes of Pope Francis, 16 July 2021, by this letter, I extend to you the faculty to continue celebrating the Sacred Liturgy using the Roman Missal of St. John XXIII of 1962 mutatis mutandis, that is observing the adaptations called for in the Apostolic Letter. The grant of the faculty is in force immediately and until the above-referenced Instruction for the Diocese is issued.