St. Ignatius encouraged Novices to preach, and I know there’s a widespread custom of having Jesuit novices preach the homily during Mass. Pope Paul III gave blanket permission for any member of the Society to preach anywhere in the world on any occasion provided he was approved for it by his superiors. So this is traditional for the Jesuits, and it is practiced in Jesuit Novitiates today.
That said, Redemptionis sacramentum expressly forbids “admission of laypersons to preach within the Mass,” which applies also to seminarians and students studying theology. It also says “any previous norm that may have admitted non-ordained faithful to give the homily during the eucharistic celebration is to be considered abrogated by the norm of canon 767 §1. This practice is reprobated, so that it cannot be permitted to attain the force of custom.” This would seem to make Novices preaching illicit.
How do the Jesuits get away with it in all their novitiates? Is it just institutionalized dissent, or have they received a dispensation? I ask because someone I know is considering entering the order, but is worried this custom will put him in a position where he’s forced to sin. Novices aren’t allowed to opt out.