The true Catholic Church rejects the reforms within Roman Catholicism of the Second Vatican Council and regards the Council as a Latrocinium or invalid council. While in the Catholic Church in communion with Pope John Paul II the use of the Tridentine Mass needs a special dispense and most masses in latin are celebrated according to the Roman Missal approved by Pope Paul VI (Novus Ordo, that is new order), the tCC continues to use the Tridentine liturgy.
While it claims a worldwide membership, all available evidence suggests that this church has a small, largely Montana-based membership. On his election to the tCC papacy, Pope Pius XIII's raising to episcopal office (Roman Catholic polity says that if someone not already a bishop is elected pope, then he is first consecrated as a bishop before his installation as pope), which took place in a hotel ballroom, was attended by just twenty-eight people.
1 It argues without much evidence that Pope John when Angelo Roncalli joined the Freemasons in 1935, an act which earned him automatic excommunication, thus invalidating his election as pope. It argues that Pope Paul VI, Pope John Paul I and Pope John Paul II were not valid popes because (i) their election followed a death of an invalid predecessor, thus invalidating the conclave, and (ii) that their policies and support for Vatican II broke fundamental beliefs laid down at and since the Council of Trent and thus could only have been performed by an antipope.Footnote