This is just a technical clarification. The SSPX is not an order or a congregation or a secular institute or a society of apostolic life. It is a priestly fraternity. They do not make vows nor are they consecrated men. They are diocesan or what canon law calls secular priests. Unofortunately, they do not have a legal place in the Church.
When they become regularized, which I pray will happen, they will have to choose to remain together as a priestly fraternity for secular priests and a leadership will be appointed by the Holy See. This is canon law. There is no way around that. You can’t have priests without an Ordinary. It most likely be one of their bishops. The other option is for the individuals who want it to petition the bishop of their choice to be incardinated into that bishop’s diocese. At the time that the incardination is complete, they belong to that diocese.
The final option is for those who feel a call to the consecrated life is to request admission to a religious order, a religious congregation, a secular institute or a society of apostolic life. This gets tricky. To become a consecrated man or woman you must give up your allegiance to any other organization in the Church and outside the Church. Religious men cannot have any allegiance to any group except their order and to any leader, except their founder, his successors and to the Holy Father. In effect, if an SSPX priest becomes a consecrated religious, he ceases to be a member of the SSPX and submits to the authority of a religious superior and the rule of the community. The community will determine whether he can celebrate the EF or the OF or both, because the vow of obedience trumps Holy Orders. Therefore, the Motu Propio does not apply to consecrated religious. As it says int he MP, religious clerics must follow the norms of their institute regarding the EF and OF.
I didn’t mean to make it this long. But I did want to clarify the technical difference between the SSPX and consecrated men. The SSPX are diocesans, without a diocese. That’s the sad part about it. Sometimes, people can be mean to those who are homeless. That’s not right. I do not defend or justify it. I believe that if priests of the SSPX became incardinated into a diocese or become consecrated men, they will experience some relief. Hopefully, if they are regularize, they will also experience relief from those around them. Then they’ll be a priestly society just like Maryknoll or the Vincentians. No one ever picks on them.
Fraternally,
Br. JR, OSF