When the reforms of the Second Vatican Council came to his Mexican parish in the late 1960s and early 1970s, he refused to conform. Influenced by his friend, Fr. Joaquin Saenz Arriaga (who came to the conclusion that the Second Vatican Council had established a new religion and that Pope Paul VI was a false pope), Carmona came to embrace Fr. Saenz's ideas, and was excommunicated and removed from his post as pastor of Divine Providence parish by Rafael Bello Ruiz, the bishop of Acapulco, on April 30, 1977. With the support of his 2,000 parishioners and due to Mexican law, Father Carmona was able to keep his parish church despite his excommunication.
Carmona, along with Fathers Joaquin Saenz Arriaga and Adolfo Zamora, formed the Union Catolica Trento. On October 17, 1981, Carmona and Zamora were consecrated bishop by the traditionalist Roman Catholic archbishop Ngô Ðình Thuc, who at the time adhered to sedevacantism.
Bishop Carmona proceeded to consecrate other bishops for the traditional Catholic movement, most of them sedevacantists. They were Mexicans Benigno Bravo and Roberto Martinez y Gutiérrez and Americans George Musey and Mark Pivarunas.
Carmona died November 1, 1991 from injuries sustained in an automobile accident in Mexico.
|Consecrated by:||Pierre Martin Ngô Đình Thục|
|Date of consecration:||October 17, 1981|
|Bishop||Date of consecration|
|George Musey||April 1, 1982|
|Benigno Bravo||June 18, 1982|
|Roberto Martínez y Gutiérrez||June 18, 1982|
|Mark Pivarunas||September 24, 1991|
Carmona also conditionally consecrated Peter Hillebrand a bishop on July 17, 1991.