Canon 25
On the presbyters or deacons who commited an offence after ordination.
If a presbyter had sinned before ordination and confessed after ordination that he had erred in past, he shall not celebrate offerings, but he only retain the name of presbyter for the sake of religion. If, however, it is not he who confessed, but he was publicly convicted by someone else, he shall not have right to bear the name of presbyter. It shall be observed in regard to the deacons as well that if one of them has confessed a crime, he shall be received in the order of subdeacons.
(trans. M. Szada)