[quote="ProVobis, post:9, topic:238490"]
This is probably more applicable in more public Masses. I've been at funeral Masses and retreat centers where admitted non-Catholics were actually encouraged to read, cantor the Mass, sing the hymns, etc. I didn't even want to see whether they received or not.
It's not a violation of Church law if they do, but it would make little sense to do so unless it's as I said, your sister's wedding or your parent's funeral or something very close to hom. Even receiving communion may be allowed by the local Ordinary. That's his call to make. Pope Benedict allows it to some Protestants at his masses. The last one that I remember seeing was Brother Roger of Taize, who was Lutheran. However, Brother believed in the real presence and was a personal friend of Pope John Paul and Pope Benedict. They knew his beliefs personally, not through some magazine article that they read somewhere. At the local level, the same rule applies. If the bishop knows of a good reason to allow a Protestant or an Orthodox to receive Holy Communion, he may do so.
As to reading, cantoring, bringing up the gifts, it's not an infraction of any rule and you don't need the bishop's permission; but it's not the logical thing to do.
Br. JR, OSF :)