Can. 97 §1. A person who has completed the eighteenth year of age has reached majority; below this age, a person is a minor.
§2. A minor before the completion of the seventh year is called an infant and is considered not responsible for oneself ( non sui compos ). With the completion of the seventh year, however, a minor is presumed to have the use of reason.
Can. 852 §1. The prescripts of the canons on adult baptism are to be applied to all those who, no longer infants, have attained the use of reason.
§2. A person who is not responsible for oneself ( non sui compos ) is also regarded as an infant with respect to baptism.
Can. 865 §1. For an adult to be baptized, the person must have manifested the intention to receive baptism, have been instructed sufficiently about the truths of the faith and Christian obligations, and have been tested in the Christian life through the catechumenate. The adult is also to be urged to have sorrow for personal sins.
§2. An adult in danger of death can be baptized if, having some knowledge of the principal truths of the faith, the person has manifested in any way at all the intention to receive baptism and promises to observe the commandments of the Christian religion.
Can. 866 Unless there is a grave reason to the contrary, an adult who is baptized is to be confirmed immediately after baptism and is to participate in the eucharistic celebration also by receiving communion.