269. Who can receive the sacrament?Only those already baptized can and should receive this sacrament which can be received only once. To receive Confirmation efficaciously the candidate must be in the state of grace.
Further reading: CCC 1306-1311, 1319270. Who is the minister of Confirmation?
The original minister of Confirmation is the bishop. In this way the link between the confirmed and the Church in her apostolic dimension is made manifest. When a priest confers this sacrament, as ordinarily happens in the East and in special cases in the West, the link with the bishop and with the Church is expressed by the priest who is the collaborator of the bishop and by the Sacred Chrism, consecrated by the bishop himself.
Further reading: CCC 1312-1314