The duration of designation to receive papal jurisdiction. The designation to office endures until (1) the death of the subject; (2) the voluntary refusal or resignation of the subject; (3) the removal of the designation from the subject by him who has the right to do so.
There is no other way of losing the designation. Although there is no authority which is able to judge the pope, nevertheless the body of electors is able to take away from him the designation. For the designation comes from God only mediately, but immediately from the electors. For which reason, it is not beyond the rights of the electors of the pope to ascertain the fact of the loss of jurisdiction in an elected pope, or also his lack of disposition to receiving papal authority.
So Bishop Sanborn's explanation leads to
papa haereticus ipso facto formaliter depositus, materialiter ab Ecclesia deponendus. Interesting.
But he would also rule out actual jurisdiction persisting through the heretics, though a potential jurisdiction would perdure, and any member of the current hierarchy who's not a heretic would also have formal jurisdiction. I wonder if Bishop Sanborn would allow for the existence of any of these. So if you can find a single member of the current hierarchy (validly consecrated of course) who's not a formal heretic, he would have jurisdiction via Benedict XVI.
Therefore he who is designated to the papacy, even if he does not receive authority, because of an obstacle either of heresy or of refusal of episcopal consecration or for any other reason, nevertheless he is able to nominate others to receive authority, (e.g., bishops) and even electors of the pope, because all these acts pertain merely to the continuation of the material part of authority, and do not involve jurisdiction, because in nomination no law is made. Nomination or designation is merely a preparation, and remote indeed, for the making of law.
This definitely make a lot of sense to me.
http://www.sodalitiumpianum.com/index.php?pid=27