Alas, an antipope has no authority, and no jurisdiction. There will be many priests, seminarians, and lay faithful who are going to learn this the hard way, or not.
Below is from Dr. Robert Moynihan at Inside the Vatican:
Letter #23, 2023 Wednesday, January 18: “No secrets”
I just received a fascinating letter, which I publish below.
I took my distance a bit yesterday (see this link) from the “rumors” in Rome that Pope Francis (sic) may soon issue a new decree further restricting the celebration of the old Mass.
Then, I received this letter.
It begins: “As we both know, there are no real ‘secrets’ in Rome.”
Then, essentially, the letter-writer tells me that the “rumor” does in fact contain a truth: that there is a draft Vatican document which would further restrict the celebration of the old Mass.
The letter is from a priest who confided in me that “an archbishop in the States has seen this document.”
The archbishop, he continues, “confirmed to a priest friend of mine (who is a person of true integrity and would not casually spread rumor), that it does indeed contain what some have guessed at — a further suppression of the TLM…”
I replied to the letter-writer, confirmed his identity, and know that the letter is not a prank, but a serious communication.
I regard it as credible. (If I did not, I would not publish it here.)
The news is “second-hand” because it comes from another priest, who learned of this from an archbishop, but I am persuaded that the “chain of witness” is not so fragile as to discredit the report.
Read the letter HERE.