My resulting question would be, is the ineligible person’s acts while in office then rendered void?
Good question. Don't know what became of any (if any) executive decisions Moodie made while in office for the 5 or 6 weeks he usurped that office.
I believe this would be some seriously uncharted territory.
If a person is not eligible to hold the office from the get go, under what authority could they then have made any decisions?
The same could be asked of Chester Arthur.
If no one brings the case against them, and is heard, I would assume nothing would happen to their decisions.
Someone (some people) would have to make a formal challenge.
Of course, the first challenge would be for those "in power" to determine that he isn't a "natural Born Citizen" as required for the office. Then, what he has done becomes the next challenge.