Bentuk luar biasa Ritus Roma

The last version of the Missale Romanum prior to the Council, which was published with the authority of Pope John XXIII in 1962 and used during the Council, will now be able to be used as a "Forma extraordinaria" of the liturgical celebration. It is not appropriate to speak of these two versions of the Roman Missal as if they were "two Rites". Rather, it is a matter of a twofold use of one and the same rite.