From America:
The Vatican’s Secretariat of State has issued an instruction regarding the celebration of Mass in St. Peter’s Basilica, suppressing Masses said by a priest by himself, and restricting the celebration of the extraordinary form of Mass in the Latin rite to one altar in the crypt of the basilica.
The instruction comes from the First Section of the Secretariat of State, which deals with the general affairs of the church and is headed by Venezuelan-born Archbishop Peña Parra. He is the third-highest ranking official in the Roman Curia and is known as the “substitute” (or chief of staff).
From Catholic News Agency:
A new letter from the Vatican Secretariat of State has banned the private celebration of Masses at side altars in St. Peter’s Basilica, effective March 22.
The regulation might seem tailored to meet COVID restrictions, as Italy prepares to tighten its pandemic measures once again. However, the new rule appears to be permanent. Another change – Mass offered in the extraordinary form of the Roman Rite will be limited to the Clementine Chapel in the Vatican Grotto.