Sedevacantism

[2][3] The phrase is commonly used to refer specifically to a vacancy of the Holy See which takes place from the Pope's death or renunciation to the election of his successor.

[8] Sedevacantists reject this Council, on the basis of their interpretations of its documents on ecumenism and religious liberty, among others, which they see as contradicting the traditional teachings of the Catholic Church and as denying the unique mission of Catholicism as the one true religion, outside of which there is no salvation.

[9] They also say that new disciplinary norms, such as the Mass of Paul VI promulgated on 3 April 1969, undermine or conflict with the historical Catholic faith and are deemed blasphemous, while post-Vatican II teachings, particularly those related to ecumenism, are labelled heresies.

[13] Accordingly, they hold that Pope John XXIII and his successors have left the true Catholic Church and thus lost legitimate authority.

These are Traditional Latin Masses naming the man considered by the majority of Catholics as the Pope in the Roman Canon in the "Te igitur" prayer, specifically where the priest says "una cum famulo tuo Papa nostro N" (“together with Thy Servant N., our Pope.”) Cekada argues that it is not, under any circumstances, permissible.

[21] In contrast to sedevacantists, sedeprivationists affirm the Thesis of Cassiciacum by the Dominican theologian Bishop Michel-Louis Guérard des Lauriers as being a valid position, which states that John XXIII and his successors are popes materialiter sed non formaliter (“materially but not formally”), and that post-Vatican II popes will become legitimate once they recant their heresies.

[29][30] Carmona and Zamora had been sedevacantist leaders and propagators in Mexico[32] for many years, and were among the priests who formed the Tridentine Catholic Union.

[29] On 19 October 1993, in Carlsbad, California, United States, Bishop Méndez-Gonzalez consecrated the sedevacantist Clarence Kelly of the Society of Saint Pius V (SSPV) to the episcopacy.

[36][page needed] While Duarte Costa was not a sedevacantist, he instead questioned the papacy as an institution, denying papal Infallibility and rejecting the pope's universal jurisdiction.