The Canons of the Councils of Ancyra, Gangra, Neocæsarea, Antioch and Laodicea, which Canons were Accepted and Received by the Ecumenical Synods 18Canon XVIII.

If any who have been constituted bishops, but have not been received by the parish to which they were designated, shall invade other parishes and wrong the constituted [bishops] there, stirring up seditions against them, let such persons be suspended from office and communion. But if they are willing to accept a seat among the presbyterate, where they formerly were presbyters, let them not be deprived of that honour. But if they shall act seditiously against the bishops established there, the honour of the presbyterate also shall be taken from them and themselves expelled.