Catechism Corner | To Understand the Eucharist (Part 16)

IV. THE DISTRIBUTION OF DUTIES AND THE PREPARATION OF THE CELEBRATION

108. One and the same priest celebrant must always exercise the presidential office in all of its parts, except for those parts which are proper to a Mass at which the Bishop is present (cf. no. 92).

109. If there are several persons present who are able to exercise the same ministry, nothing forbids their distributing among themselves and performing different parts of the same ministry or duty. For example, one deacon may be assigned to take the sung parts, another to serve at the altar; if there are several readings, it is well to distribute them among a number of lectors. The same applies for the other ministries. But it is not at all appropriate that several persons divide a single element of the celebration among themselves, e.g., that the same reading be proclaimed by two lectors, one after the other, except as far as the Passion of the Lord is concerned.

110. If only one minister is present at a Mass with a congregation, that minister may exercise several different duties.

111. Among all who are involved with regard to the rites, pastoral aspects, and music there should be harmony and diligence in the effective preparation of each liturgical celebration in accord with the Missal and other liturgical books. This should take place under the direction of the rector of the church and after the consultation with the faithful about things that directly pertain to them. The priest who presides at the celebration, however, always retains the right of arranging those things that are his own responsibility.[90]

CHAPTER IV

The Different Forms of Celebrating Mass

112. In the local Church, first place should certainly be given, because of its significance, to the Mass at which the Bishop presides, surrounded by his presbyterate, deacons, and lay ministers,[91] and in which the holy people of God participate fully and actively, for it is there that the preeminent expression of the Church is found.
At a Mass celebrated by the Bishop or at which he presides without celebrating the Eucharist, the norms found in the Caeremoniale Episcoporum should be observed.[92]

113. Great importance should also be attached to a Mass celebrated with any community, but especially with the parish community, inasmuch as it represents the universal Church gathered at a given time and place. This is particularly true in the communal Sunday celebration.[93]

114. Among those Masses celebrated by some communities, moreover, the conventual Mass, which is a part of the daily Office, or the community Mass, has a particular place. Although such Masses do not have a special form of celebration, it is nevertheless most proper that they be celebrated with singing, especially with the full participation of all members of the community, whether of religious or of canons. In these Masses, therefore, individuals should exercise the office proper to the Order or ministry they have received. It is appropriate, therefore, that all the priests who are not bound to celebrate individually for the pastoral benefit of the faithful concelebrate at the conventual or community Mass in so far as it is possible. In addition, all priests belonging to the community who are obliged, as a matter of duty, to celebrate individually for the pastoral benefit of the faithful may also on the same day concelebrate at the conventual or community Mass.[94] For it is preferable that priests who are present at a Eucharistic Celebration, unless excused for a good reason, should as a rule exercise the office proper to their Order and hence take part as concelebrants, wearing the sacred vestments. Otherwise, they wear their proper choir dress or a surplice over a cassock.

From: GENERAL INSTRUCTION OF THE ROMAN MISSAL