If a co-opted senator resigns from his mandate in the senate before the end of the term, the senators of the federated entities competent for this question, according to a declaration mentioned in article 220, § 2, established by the members of the Chamber of Representatives belonging to the list of the same political alliance as the vacant seat of the co-opted senator, attend to the question of replacement following the modalities mentioned in articles 215 to 220.

However, if the vacant seat belongs to a political alliance not represented by the senators in the federated entities, the rules stipulated in article 220, § 6, are to be applied in order to proceed in the question of replacement of the co-opted senator.