284. When Communion is distributed under both kinds:
a) the chalice is usually administered by a Deacon or, in the absence of a Deacon, by a Priest, or even by a duly instituted acolyte or another extraordinary minister of Holy Communion, or by one of the faithful who, in a case of necessity, has been entrusted with this duty for a single occasion;
b) whatever may remain of the Blood of Christ is consumed at the altar by the Priest or the Deacon or the duly instituted acolyte who ministered the chalice. The same then purifies, wipes, and arranges the sacred vessels in the usual way.
No surprise that no one is forced to receive Communion:
Any of the faithful who wish to receive Holy Communion under the species of bread alone should be given Communion in this form.
Notes for the sacristan:
285. For Communion under both kinds the following should be prepared:
a) If Communion from the chalice is done by drinking directly from the chalice, a chalice of a sufficiently large size or several chalices are prepared. However, care should be taken lest beyond what is needed of the Blood of Christ remains to be consumed at the end of the celebration.
b) If Communion from the chalice is done by intinction, the hosts should be neither too thin nor too small, but rather a little thicker than usual, so that after being intincted partly into the Blood of Christ they can still be easily distributed.
286. If Communion of the Blood of Christ is carried out by communicants’ drinking from the chalice, each communicant, after receiving the Body of Christ, moves to the minister of the chalice and stands facing him. The minister says, The Blood of Christ, the communicant replies, Amen, and the minister hands over the chalice, which the communicant raises to his or her mouth. Each communicant drinks a little from the chalice, hands it back to the minister, and then withdraws; the minister wipes the rim of the chalice with the purificator.
287. If Communion from the chalice is carried out by intinction, each communicant, holding a Communion-plate under the mouth, approaches the Priest who holds a vessel with the sacred particles, with a minister standing at his side and holding the chalice. The Priest takes a host, intincts it partly in the chalice and, showing it, says, The Body and Blood of Christ. The communicant replies, Amen, receives the Sacrament in the mouth from the Priest, and then withdraws.
And on this note, we conclude Chapter IV (GIRM 112-287), The Different Forms of Celebrating Mass.