Canon 11
About the prohibition for clergy to pray together with those defrocked.
If anyone, being a cleric, prays with a deposed cleric, let him also be deposed.
Greek original
Εἴ τις καθῃρημένῳ κληρικὸς ὤν κληρικῷ συνεύξηται, καθαιρείσθω καὶ αὐτός.
Parallel canons
Ап.28Антиох.4Карф.10