(Note: I will be adding many more comments, but am mad about my lack of productivity so am forcing myself to post this in an incomplete form. But Canon 13, oh Canon 13!)
Let's look at another Canon a lot later in the list of Canons:
Concerning the departing, the ancient canonical law is still to be maintained, to wit, that, if any man be at the point of death, he must not be deprived of the last and most indispensable Viaticum. But, if any one should be restored to health again who has received the communion when his life was despaired of, let him remain among those who communicate in prayers only. But in general, and in the case of any dying person whatsoever asking to receive the Eucharist, let the Bishop, after examination made, give it him.
If we are rightfully accused of believing in Magic, as some have done---if we are making more out of the Eucharist than those who consider it merely symbolic would say we are, why would the first Ecumenical council make sure that NO ONE be deprived of the Eucharist on their way out of the earth?