What about this one?
A person has been being an Extraordinary Minister of Holy Communion, then reads a book and changes his/her mind.
So the person then changes their intention of using their “unconsecrated” hands to distribute Holy Communion — the Body and Blood of Christ — and decides not to do it any more.
A person cannot be guilty of something that was truly inadvertent. You can't "inadvertently" incur guilt for, e.g. sacrilege. Bur as soon as you realized it was sacrilege, you'd be obliged to stop.
Are EM's supposed to have their hands consecrated? Or...what? What does Canon Law say? Is an individual bishop allowed to establish norms for his own diocese? (This is one of the many things I don't know anything about.)