Of Thuc's mandatum?  I've seen images of similar mandata issued to other Iron Curtain bishops, but not the actual Thuc one.  Kalata, who is still alive ... circling back to the original thread topic ... most likely had one.

Thanks in advance.  I recall Nishant saying that but I also recall that he was overstating his case.  I have never seen any theological manual discussing specifically the jurisdictional hierarchy in the context of the indefectibility of the Church.  Whenever they do discuss indefectibility they don't go into the specifics of what would constitute a defection.  So I don't think the specifics are based on divine revelation.  The discussion would need to be limited to what what we can know from reason.  Obviously, the Church must have at least one bishop.  But why would the Church need at least one ordinary when ordinary jurisdiction is not necessary for electing a pope?  If it was a revealed doctrine then end of discussion.  But if it isn't revealed, there is no logical reason for advancing such a proposition.

Thank you.  So it is said that the extent of the powers was verbally communicated.  With that, we'll never know for sure what the Pope told +Thuc.  I don't believe that +Thuc ever gave details.

Just TWO such bishops alive now.