Thanks, Choy.
I’d be interested if there were any mandates from Rome. I still am questioning whether or not a directive which specifies which hand one is to receive exists and if it is a guidline or a rule.
It seems to me that St. Cyril’s instructions are a little clumsy, assuming that the communicant is right handed, when one is taking a modern host. I realize this may be overanalyzing the subject at hand, but it’s near impossible if not very difficult to receive in one’s right hand (assuming one is right handed) and manipulate the host to place it in one’s mouth. One would think that one would have to use their left hand to take the host out of the right and place it in one’s mouth.
I suspect that either Cyril was left handed or, more likely, the ancient host was more breadlike and subject to fragmenting. In such a case one might receive in the right hand, then place the bread/host in their mouth with an open hand, in order to get all the fragments in, not pick it up with the fingers which is how we manage the modern host.