XXXVII. On the excommunicated clerics.
If a bishop, presbyter, or deacon has been excommunicated at the council, and after the excommunication this bishop, presbyter, or deacon presumed to offer a matutinal or vesperine sacrifice like he used to do in his office, he is not allowed to do that, and he will not have a hope of reconciliation at another council, and he will not be reconciled, but also all those who communicated with him shall be expelled from the Church, and especially those who knew that he is an excommunicant. If, however, he does not stop to confuse and shake his Church by the judicial power, he shall be expelled from all the people as a rebel.
(trans. M. Szada)