4. On the Joining of Various Rites with the Celebration of Mass
[75.] On account of the theological significance inherent in a particular rite and the Eucharistic Celebration, the liturgical books sometimes prescribe or permit the celebration of Holy Mass to be joined with another rite, especially one of those pertaining to the Sacraments. The Church does not permit such a conjoining in other cases, however, especially when it is a question of trivial matters.
[76.] Furthermore, according to a most ancient tradition of the Roman Church, it is not permissible to unite the Sacrament of Penance to the Mass in such a way that they become a single liturgical celebration. This does not exclude, however, that Priests other than those celebrating or concelebrating the Mass might hear the confessions of the faithful who so desire, even in the same place where Mass is being celebrated, in order to meet the needs of those faithful. This should nevertheless be done in an appropriate manner.
[77.] The celebration of Holy Mass is not to be inserted in any way into the setting of a common meal, nor joined with this kind of banquet. Mass is not to be celebrated without grave necessity on a dinner table nor in a dining room or banquet hall, nor in a room where food is present, nor in a place where the participants during the celebration itself are seated at tables. If out of grave necessity Mass must be celebrated in the same place where eating will later take place, there is to be a clear interval of time between the conclusion of Mass and the beginning of the meal, and ordinary food is not to be set before the faithful during the celebration of Mass.
[78.] It is not permissible to link the celebration of Mass to political or secular events, nor to situations that are not fully consistent with the Magisterium of the Catholic Church. Furthermore, it is altogether to be avoided that the celebration of Mass should be carried out merely out of a desire for show, or in the manner of other ceremonies including profane ones, lest the Eucharist should be emptied of its authentic meaning.
[79.] Finally, it is strictly to be considered an abuse to introduce into the celebration of Holy Mass elements that are contrary to the prescriptions of the liturgical books and taken from the rites of other religions.