Canon 31
That he who separated from the bishop without guilt and set up another altar will be defrocked along with the one who accepted it.
If a presbyter, despising his bishop, begins to hold separate meetings and erects another altar, without noticing in the bishop anything contrary to piety and justice, let him be deposed as a power-hunger, for he is a thief of power. Likewise all other clerics who join him; the laity shall be excommunicated. But let this be done after the first, second and third admonition from the bishop.
Greek original
Εἴ τις πρεσβύτερος, καταφρονήσας τοῦ ἰδίου ἐπισκόπου, χωρὶς συναγάγῃ, καὶ θυσιαστήριον ἕτερον πήξῃ, μηδὲν κατεγνωκώς τοῦ ἐπισκόπου ἐν εὐσεβείᾳ καὶ δικαιοσύνῃ, καθαιρείσθω, ὡς φίλαρχος· τύραννος γάρ ἐστιν. Ὡσαύτως δὲ καὶ οἱ λοιποὶ κληρικοί, καὶ ὅσοι ἂν αὐτῷ προσθῶνται· οἱ δὲ λαϊκοὶ ἀφοριζέσθωσαν. Ταῦτα δὲ μετὰ μίαν, καὶ δευτέραν καὶ τρίτην παράκλησιν τοῦ ἐπισκόπου γινέσθω.