214. The baptismal washing is followed by rites that give expression to the effects of the sacrament just received. The anointing with chrism is a sign of the royal priesthood of the baptized and that they are now numbered in the company of the people of God. The clothing with the baptismal garment signifies the new dignity they have received. The presentation of a lighted candle shows that they are called to walk as befits the children of the light.
Three rites, and notice no chrismation–not until confirmation, anyway.
“Explanatory” describes the rites well enough, but the term leaves us way short of what is trying to be communicated and celebrated here.