It is similar to some extent.Irish Hermit said:Is this the same line as taken by your Sede Vacantists and other dissident RC Churches?
The question concerned the papal bull unam sanctam and its extreme statement:" Furthermore, we declare, we proclaim, we define that it is absolutely necessary for salvation that every human creature be subject to the Roman Pontiff." I believe that the Catholic sedevacantists such as Most Holy Family Monastery adhere to the literal interpretation of this extreme statement, but I don't know anyone else who takes it literally today. That's why I brought up the calendar question, since there are those "uncanonical" Orthodox who say that it is heretical to embrace the New Calendar, and I would put this in the same folder with the literal interpretation of unam sanctam.
But, that's just my personal opinion on it, and i don;t know what the official RC interpretation of unam sanctam is today and I am not sure how they officially resolve the apparent contradiction of unam sanctam with the push toward ecumenical reconciliation. When i tried to discuss something like this at CAF, they gave me a warning of a couple of points saying that I had some "agenda."