Constantinople I: canon VII

Those who embrace orthodoxy and join the number of those who are being saved from the heretics, we receive in the following regular and customary manner: Arians, Macedonians, Sabbatians, Novatians, those who call themselves Cathars and Aristae, Quartodeciman or Tetradites, Apollinarians-these we receive when they hand in statements and anathematise every heresy which is not of the same mind as the holy, catholic and apostolic church of God. They are first sealed or anointed with holy chrism on the forehead, eyes, nostrils, mouth and ears. As we seal them we say: "Seal of the gift of the holy Spirit". But Eunomians, who are baptised in a single immersion, Montanists (called Phrygians here), Sabellians, who teach the identity of Father and Son and make certain other difficulties, and all other sects -- since there are many here, not least those who originate in the country of the Galatians -- we receive all who wish to leave them and embrace orthodoxy as we do Greeks. On the first day we make Christians of them, on the second catechumens, on the third we exorcise them by breathing three times into their faces and their ears, and thus we catechise them and make them spend time in the church and listen to the scriptures; and then we baptise them.

Nicæa I: canon XIX

Concerning the former Paulinists who seek refuge in the catholic church, it is determined that they must be rebaptised unconditionally. Those who in the past have been enrolled among the clergy, if they appear to be blameless and irreproachable, are to be rebaptised and ordained by the bishop of the catholic church. But if on inquiry they are shown to be unsuitable, it is right that they should be deposed. Similarly with regard to deaconesses and all in general whose names have been included in the roll, the same form shall be observed. We refer to deaconesses who have been granted this status, for they do not receive any imposition of hands, so that they are in all respects to be numbered among the laity.