"PaxChristi2" professes false doctrine in his comment on Fr. Ghirlanda's exposition: 《The entire quotation in context confirms exactly what I wrote on November 13: "The Church judges and declares the fact, and at that "moment" the See becomes vacant."》
What I have gone to great length to explain is that according to canonical doctrine as well as the canonical provisions currently in force, all ecclesiastical offices are lost ipso jure by public defection from the Catholic faith. Public defection need not be "notorious by fact"; but it suffices, according to the letter of the law, that the defection be PUBLIC, accordingly as PUBLIC is defined in canon law. The sin of heresy constitutes a defection from the faith in its very nature which, if public, severs one from the body of the Church and causes an automatic loss of jurisdiction (as St. Thomas whom I quoted verbatim, explains). Bellarmine follows St. Thomas (citing the same article that I quoted), and concludes that all jurisdiction and ecclesiastical jurisdiction are lost "ex natura hæresis". The magisterial teaching of Pius XII in Mystici Corporis follows this doctrinal tradition exactly, explaining that schism, heresy, and apostasy separate one from the body of the Church "suapte natura" (by their very nature); and accordingly heretics, schismatics, and apostates "miserably separate themselves" from membership in the Church, while all others guilty of grave transgressions are expelled from the Church "by legitimate authority".
Thus, Bellarmine explains that it is "by the nature of heresy" which is defined as an obstinate disbelief (denial or doubt) of an article of divine and Catholic faith, that all offices are lost "ipso facto", "per se", and "without any external agency" (sine alia vi externa" by the very act of "manifest heresy", which he says (in his refutation of opinion no. 4) consists in formal heresy in which pertinacity is manifest.
Fr. Ghirlanda's teaching in no way contradicts this doctrine: He says the loss of office takes place "ipso jure", which by definition means "by operation of the law itself", and not by declaration of authority. What he explains is the de jure establishment of the vacancy takes place at the moment of the promulgation of the declaration, (but not the actual fact of the vacancy which he explained to have already occurred ipso jure. "PaxChristi2" (a.k.a. John Salza) ignorantly interprets Fr. Ghirlanda in such a manner that would involve the eminent canonist in a crude contradiction. What Fr. Ghirlanda explained is that the FACT of the vacancy happens automatically (ipso jure), but the juridical recognition of it takes place when the declaration is issued.
I have quoted verbatim the texts of Msgrs. Fenton and Van Noort, as well as Canon George Smith in The Teaching of the Catholic Church, who all explain the doctrine of Mystici Corporis; explicitly stating that the SIN of heresy cuts one off from membership in the Church. Incredibly and absurdly, Salza & Siscoe continue to obstinately and blindly reject that teaching of the supreme magisterium by interpreting it according to their bizarre heretical opinion which holds that only the CRIME and not the SIN of heresy severs one suapte natura from membership in the Church. The opinion is absurd on its face, because no crime as such severs one from the Church by its own nature but by the penalty of excommunication attached to it by law. Hence, for a crime one is severed "by legitimate authority" (i.e. excommunication). Crimes, according to the nature of "crime", bring about the separation from the body of the Church by means of the PENALTY. But schism, heresy, and apostasy separate one by the very nature of the SIN, because each of these sins in their very nature are an act that severs from the body of the Church. Salza & Siscoe reject with blind obstinacy this manifest dogma definitively taught by the universal and ordinary magisterium. Therefore, Salza and Siscoe are manifest heretics.