High School Confirmation

The sacrament of confirmation strengthens the baptized and obliges them more firmly to be witnesses of Christ by word and deed and to spread and defend the faith. It imprints a character, enriches by the gift of the Holy Spirit the baptized continuing on the path of Christian initiation, and binds them more perfectly to the Church. Can. 879

Every baptized person not yet confirmed and only such a person is capable of receiving confirmation.
Can. 889 § 1

To receive confirmation licitly outside the danger of death requires that a person who has the use of reason be suitably instructed, properly disposed, and able to renew the baptismal promises.
Can. 889 § 2