In Brief CCC 1319
© Libreria Editrice Vaticana Source: vatican.va
A candidate for Confirmation who has attained the age of reason must profess the faith, be in the state of grace, have the intention of receiving the sacrament, and be prepared to assume the role of disciple and witness to Christ, both within the ecclesial community and in temporal affairs.
Read the full chapter 1. The Sacraments of Christian Initiation ¶1212–1419