Communion.

253. Q. What is Holy Communion?
A. Holy Communion is the receiving of the body and blood of Christ.

254. Q. What is necessary to make a good Communion?
A. To make a good Communion it is necessary to be in the state of
sanctifying grace, to have a right intention, and to obey the laws of
fasting. (See Q. 257.)

255. Q. Does he who receives Communion in mortal sin receive the body
and blood of Christ?
A. He who receives Communion in mortal sin receives the body and blood
of Christ, but does not receive His grace, and he commits a great
sacrilege.

256. Q. Is it enough to be free from mortal sin to receive plentifully
the graces of Holy Communion?
A. To receive plentifully the graces of Holy Communion it is not enough
to be free from mortal sin, but we should be free from all affection to
venial sin, and should make acts of faith, hope, and love.

257. Q. What is the fast necessary for Holy Communion?
A. The fast necessary for Holy Communion is to abstain from all food,
beverages, and alcoholic drinks for one hour before Holy Communion.
Water may be taken at any time. The sick may take food, non-alcoholic
drinks, and any medicine up to Communion time.

[This answer has been changed in the 1977 printing to bring it up to
date with the current rules.]