In the canon law, there is a canon that says that even an excommunicated priest can give the sacraments, the absolution, and of course the Holy Communion to a dying person in danger of death. An excommunicated priest can still give the absolution.
This is the most important, I repeat: the absolution – the sacrament of penance. You can receive Holy Communion spiritually, but for me, the most important thing is the absolution from your sins, and a schismatic priest or excommunicated priest according to the canon law can still do this because in this case, the most important law is the salvation of the soul. Maybe he can also give Holy Communion.
I think it is plausible for a schismatic priest to administer Viaticum in assisting a dying person but it is not simply for a sick person or someone in a persecuted situation. I will not say this because the Church never allowed heretical or schismatic priests in the first centuries. In the first centuries, during the persecution of the Church, they were not allowed to give sacraments unless these people were really on the verge of death.
Dear visitors of Gloria Dei and all who have already written or who will write a personal message to me. I am grateful for your attention, your kindness, for your spiritual support and especially for your sacrifices and prayers for me. God may reward you!