I answered a similar question in February 2007, with:
“The liturgical book “Rite of Christian Initiation of Adults” is unclear on this Rite of Acceptance.
Part of it suggests that the Rite of Acceptance is not to be part of Mass. For example, it begins:
“48. … As the priest or deacon, wearing an alb or surplice, a stole, and, if desired, a cope of festive color, goes to meet them …”.
There is no mention of a chasuble, which a priest would wear if it were a Mass. But other parts indicate, clearly, that it can be part of a Mass:
“67. If the eucharist is to be celebrated, the catechumens are normally dismissed at this point …”.
The ceremony is described with the invitation for them to enter, without a Penitential Rite or Gloria. But does it mean this for a Mass?
The 2002 Roman Missal includes a Mass for the Rite of Election and Scrutinies. But not for this Rite of Accpetance. So the uncertainty remains.
My opinion is that just as the priest should realize he should wear a chasuble for Mass, so he should realize that he should include a Gloria on Sunday. The Penitential Rite can be replace with a sprinkling of holy water, so I am less certain on whether it can be omitted in this case.
But on the Profession of Faith it is explicit:
“68. When the eucharist is to follow, intercessory prayer is resumed with the usual general intercessions for the needs of the Church and the whole world; then, if required, the profession of faith is said.
But for pastoral reasons these general intercessions and the profession of faith may be omitted . …”.
(The Rites Volume One, Liturgical Press, 1990, ISBN: 0-8146-6015-0, page 66).
This is specific permission to omit the Profession of Faith in this Mass. So can the other things be omitted? Hence the uncertainty.
So I think the priest may be honestly doing his best to follow the liturgical books with some complicated instructions.”
From
What is this RCIA ritual called / Parts of Mass skipped? - #5 by John_Lilburne