To let me know what the Shulchan Aruch says, a friend is enough. Paskenning means his ????? ???? confess into play.
About your supposed irony, my point is that a Kehilla following a Rav will centralize the Torah, although we don’t have everyone following one Beis Din which would give complete centralization. But at least as closer to it as possible. It’s ironic that you would see the medicine as the disease.