I didn’t know before that this was moved from ECF. It applies to those under Rome in the East, as their hierarchies (as Ukrainians at Rome I know complained bitterly about) are arranged according to it. It doesn’t apply to the Orthodox as Constantiople IV 879 annulled that of 869.
I might help to have the canons:
Constantinople “IV” (869):
The first, holy and universal synod of Nicaea orders that the ancient custom should be preserved throughout Egypt and the provinces subject to her, so that the bishop of Alexandria has them all under his authority; it declares, “Because such a custom has prevailed in the city of Rome”. Therefore this great and holy synod decrees that in old and new Rome and the sees of Antioch and Jerusalem the ancient custom must be preserved in all things, so that their prelates should have authority over all the metropolitans whom they promote or confirm in the episcopal dignity, either through the imposition of hands or the bestowal of the pallium; that is to say, the authority to summon them, in case of necessity, to a meeting in synod or even to reprimand and correct them, when a report about some wrongdoing leads to an accusation…
We believe that the saying of the Lord that Christ addressed to his holy apostles and disciples, Whoever receives you receives me, and whoever despises you despises me, was also addressed to all who were likewise made supreme pontiffs and chief pastors in succession to them in the catholic church. Therefore we declare that no secular powers should treat with disrespect any of those who hold the office of patriarch or seek to move them from their high positions, but rather they should esteem them as worthy of all honour and reverence. This applies in the first place to the most holy pope of old Rome, secondly to the patriarch of Constantinople, and then to the patriarchs of Alexandria, Antioch and Jerusalem. Furthermore, nobody else should compose or edit writings or tracts against the most holy pope of old Rome, on the pretext of making incriminating charges, as Photius did recently and Dioscorus a long time ago. Whoever shows such great arrogance and audacity, after the manner of Photius and Dioscorus, and makes false accusations in writing or speech against the see of Peter, the chief of the apostles, let him receive a punishment equal to theirs.
If, then, any ruler or secular authority tries to expel the aforesaid pope of the apostolic see, or any of the other patriarchs, let him be anathema. Furthermore, if a universal synod is held and any question or controversy arises about the holy church of Rome, it should make inquiries with proper reverence and respect about the question raised and should find a profitable solution; it must on no account pronounce sentence rashly against the supreme pontiffs of old Rome.
5. The dignity of the patriarchal sees
Renewing the ancient privileges of the patriarchal sees, we decree, with the approval of this sacred universal synod, that after the Roman church, which through the Lord’s disposition has a primacy of ordinary power over all other churches inasmuch as it is the mother and mistress of all Christ’s faithful, the church of Constantinople shall have the first place, the church of Alexandria the second place, the church of Antioch the third place, and the church of Jerusalem the fourth place, each maintaining its own rank. Thus after their pontiffs have received from the Roman pontiff the pallium, which is the sign of the fullness of the pontifical office, and have taken an oath of fidelity and obedience to him they may lawfully confer the pallium on their own suffragans, receiving from them for themselves canonical profession and for the Roman church the promise of obedience. They may have a standard of the Lord’s cross carried before them anywhere except in the city of Rome or wherever there is present the supreme pontiff or his legate wearing the insignia of the apostolic dignity. In all the provinces subject to their jurisdiction let appeal be made to them, when it is necessary, except for appeals made to the apostolic see, to which all must humbly defer.
as this doesn’t involve us, I’ll sit out, at least for a while.