Правило 16 Святых Апостолов

If a bishop who happens to be such, having considered the prohibition of service determined by him as nothing, accepts them as members of the clergy: let him be excommunicated as a teacher of disorder. (Ap. 15; I Om. 15; Trul. 17; Antioch. 3). This rule is a continuation of the 15th Ap. rules, and just as the 12th rule prescribes the excommunication of every bishop who accepts without a representative letter someone excommunicated by the proper church authority, or accepts and ordains a layman unworthy for the clergy from a foreign diocese, so exactly this rule requires to punish with excommunication, as a teacher of disorder, every bishop who receives a foreign clergyman and allows him to perform church services, knowing that he is under prohibition. This rule was in force at all times, and at the beginning of the 4th century, Alexander, Bishop of Alexandria, refers to this rule, calling it “Apostolic” and condemning the heretics of his time who accepted into their clergy clergy deposed by the legitimate bishop 162. Theodoret., Hist. eccl. I, 3 [Migne, s. g., t. 82, col. 888–909]. You might be interested in: