CCC 1387
© Libreria Editrice Vaticana Source: vatican.va
To prepare for worthy reception of this sacrament, the faithful should observe the fast required in their Church. Cf. CIC, can. 919. Bodily demeanor (gestures, clothing) ought to convey the respect, solemnity, and joy of this moment when Christ becomes our guest.
Read the full chapter 1. The Sacraments of Christian Initiation ¶1212–1419