Some regulations on the Eucharistic Prayer:
21. a. According to the provisions of the Instruction Tres abhinc annos, 4 May 1967, no. 10, in Masses celebrated with a congregation, even when not concelebrated, the priest celebrant may say the canon aloud. In sung Masses he may sing those parts of the canon that may be sung according to the Rite of Concelebration.
b. In printing the words of consecration the custom of setting them in type different from the general text should be maintained in order that they may stand out more clearly.