Youcat commented through CCC – Question n. 196 - Part IV.

YOUCAT Question n. 196 - Part IV. Who can be baptized, and what is required of a candidate?

(Youcat answer - repeated) Any person who is not yet baptized can be baptized. The only prerequisite for Baptism is faith, which must be professed publicly at the Baptism.

A deepening through CCC

(CCC 1253) Baptism is the sacrament of faith (Cf. Mk 16:16). But faith needs the community of believers. It is only within the faith of the Church that each of the faithful can believe. The faith required for Baptism is not a perfect and mature faith, but a beginning that is called to develop. The catechumen or the godparent is asked: "What do you ask of God's Church?" the response is: "Faith!" 

Reflecting and meditating 

(Youcat comment) A person who turns to Christianity is not just changing a world view. He travels a path of learning (the Catechumenate), in which he becomes a new man through personal conversion, but especially through the gift of Baptism. He is now a living member of the Body of Christ.

(CCC Comment)

(CCC 1254) For all the baptized, children or adults, faith must grow after Baptism. For this reason the Church celebrates each year at the Easter Vigil the renewal of baptismal promises. Preparation for Baptism leads only to the threshold of new life. Baptism is the source of that new life in Christ from which the entire Christian life springs forth. 

(The next question is:  Why does the Church adhere to the practice of infant Baptism?)