..."It is not possible to be silent about the abuses, even quite grave ones, against the nature of the Liturgy and the Sacraments as well as the tradition and the authority of the Church, which in our day not infrequently plague liturgical celebrations in one ecclesial environment or another. In some places the perpetration of liturgical abuses has become almost habitual, a fact which obviously cannot be allowed and must cease."
[11.] "The Mystery of the Eucharist 'is too great for anyone to permit himself to treat it according to his own whim, so that its sacredness and its universal ordering would be obscured'. On the contrary, anyone who acts thus by giving free rein to his own inclinations, even if he is a Priest, injures the substantial unity of the Roman Rite, which ought to be vigorously preserved, and becomes responsible for actions that are in no way consistent with the hunger and thirst for the living God that is experienced by the people today."
"Nor do such actions serve authentic pastoral care or proper liturgical renewal; instead, they deprive Christ's faithful of their patrimony and their heritage. For arbitrary actions are not conducive to true renewal, but are detrimental to the right of Christ's faithful to a liturgical celebration that is an expression of the Church’s life in accordance with her tradition and discipline. In the end, they introduce elements of distortion and disharmony into the very celebration of the Eucharist, which is oriented in its own lofty way and by its very nature to signifying and wondrously bringing about the communion of divine life and the unity of the People of God."
[16.] “It pertains to the Apostolic See to regulate the Sacred Liturgy of the universal Church, to publish the liturgical books and to grant the recognitio for their translation into vernacular languages, as well as to ensure that the liturgical regulations, especially those governing the celebration of the most exalted celebration of the Sacrifice of the Mass, are everywhere faithfully observed.”
[64.] The homily, which is given in the course of the celebration of Holy Mass and is a part of the Liturgy itself, “should ordinarily be given by the Priest celebrant himself. He may entrust it to a concelebrating Priest or occasionally, according to circumstances, to a Deacon, but never to a layperson. In particular cases and for a just cause, the homily may even be given by a Bishop or a Priest who is present at the celebration but cannot concelebrate”.
[74.] If the need arises for the gathered faithful to be given instruction or testimony by a layperson in a Church concerning the Christian life, it is altogether preferable that this be done outside Mass. Nevertheless, for serious reasons it is permissible that this type of instruction or testimony be given after the Priest has proclaimed the Prayer after Communion. This should not become a regular practice, however. Furthermore, these instructions and testimony should not be of such a nature that they could be confused with the homily, nor is it permissible to dispense with the homily on their account.
[169.] Whenever an abuse is committed in the celebration of the sacred Liturgy, it is to be seen as a real falsification of Catholic Liturgy. St Thomas wrote, “the vice of falsehood is perpetrated by anyone who offers worship to God on behalf of the Church in a manner contrary to that which is established by the Church with divine authority, and to which the Church is accustomed”.
[184.] Any Catholic, whether Priest or Deacon or lay member of Christ’s faithful, has the right to lodge a complaint regarding a liturgical abuse to the diocesan Bishop or the competent Ordinary equivalent to him in law, or to the Apostolic See on account of the primacy of the Roman Pontiff. It is fitting, however, insofar as possible, that the report or complaint be submitted first to the diocesan Bishop. This is naturally to be done in truth and charity.
Here is an example of Archbishop Anthony S. Apuron violating Redemptionis Sacramentum: