14. Those who have been baptized continue on the path of Christian initiation through the sacrament of confirmation. In this way, they receive the Holy Spirit, conforming them more perfectly to Christ and strengthening them so that they may bear witness to Christ for the building up of his body in faith and love (Rite of Confirmation, nn. 1-2).
15. Parents, those who care for persons with disabilities, and shepherds of souls--especially pastors--are to see to it that the faithful who have been baptized are properly instructed to receive the sacrament of confirmation and to approach it at the appropriate time (Cf. canon 890). The diocesan bishop is obliged to see that the sacrament of confirmation is conferred on his subjects who properly and reasonably request it (Canon 885, sect. 1).
16. All baptized, unconfirmed Catholics who possess the use of reason may receive the sacrament of confirmation if they are suitably instructed, properly disposed and able to renew their baptismal promises (Canon 889). Persons who because of developmental or mental disabilities may never attain the use of reason are to be encouraged either directly or, if necessary, through their parents or guardian, to receive the sacrament of confirmation at the appropriate time.
17. Confirmation is to be conferred on the faithful between the age of discretion (which is about the age of seven) and eighteen years of age, within the limits determined by the diocesan bishop, or when there is a danger of death, or in the judgment of the minister a grave cause urges otherwise.
18. A sponsor for the one to be confirmed should be present. The sponsor assists the confirmed person on the continuing path of Christian initiation (Cf. canon 892). For this reason, it is desirable that the one who undertook the role of sponsor at baptism be the sponsor for confirmation (Canon 893, sect. 2).
SOURCE: Guidelines for the Celebration of the Sacraments with Persons with Disabilities (USCCB)