The restrictions mentioned in Article 3, notably on the use of parish churches, only apply in the case of 'authorised' 'groups', such as came into existence in the course of the formal application of Summorum Pontificum, or are served by a 'personal parish'.

Canonical guidance on Traditionis Custodes from the Latin Mass Society

The 1962 Mass in the Chapel of the Throne, in St Peter's Basilica, Rome, celebrated by Bishop Rey of Frejus, France, for the Summorum Pontificum Pilg…