Incensation
276. Thurification or incensation is an expression of reverence and of prayer, as is signified in Sacred Scripture (cf. Ps 141 [140]:2; Rev 8:3).
Incense may be used optionally in any form of Mass:
a) during the Entrance Procession;
b) at the beginning of Mass, to incense the cross and the altar;
c) at the procession before the Gospel and the proclamation of the Gospel itself;
d) after the bread and the chalice have been placed on the altar, to incense the offerings, the cross, and the altar, as well as the Priest and the people;
e) at the elevation of the host and the chalice after the Consecration.