What are the church rules for holding communion services?
[164.] “If participation at the celebration of the Eucharist is impossible on account of the absence of a sacred minister or for some other grave cause,” then it is the Christian people’s right that the diocesan Bishop should provide as far as he is able for some celebration to be held on Sundays for that community under his authority and according to the Church’s norms. Sunday celebrations of this specific kind, however, are to be considered altogether extraordinary. All Deacons or lay members of Christ’s faithful who are assigned a part in such celebrations by the diocesan Bishop should strive “to keep alive in the community a genuine ‘hunger’ for the Eucharist, so that no opportunity for the celebration of Mass will ever be missed, also taking advantage of the occasional presence of a Priest who is not impeded by Church law from celebrating Mass”.
[165.] It is necessary to avoid any sort of confusion between this type of gathering and the celebration of the Eucharist. The diocesan Bishops, therefore, should prudently discern whether Holy Communion ought to be distributed in these gatherings. The matter would appropriately be determined in view of a more ample co-ordination in the Bishops’ Conference, to be put into effect after the recognitio of the acts by the Apostolic See through the Congregation for Divine Worship and the Discipline of the Sacraments. It will be preferable, moreover, when both a Priest and a Deacon are absent, that the various parts be distributed among several faithful rather than having a single lay member of the faithful direct the whole celebration alone. Nor is it ever appropriate to refer to any member of the lay faithful as “presiding” over the celebration.
[166.] Likewise, especially if Holy Communion is distributed during such celebrations, the diocesan Bishop, to whose exclusive competence this matter pertains, must not easily grant permission for such celebrations to be held on weekdays, especially in places where it was possible or would be possible to have the celebration of Mass on the preceding or the following Sunday. Priests are therefore earnestly requested to celebrate Mass daily for the people in one of the churches entrusted to their care.