BCL you are correct, there is no requirement. However, I think the colonel's post was about whether there should be.............
Personally, the other posters have it right in the main, ICUS is for getting to the minimum time requirement for IFR chtr or whatever, nothing more. It is no more difficult to fly from the right as the left I have found. The person in the left seat is supposed to be endorsed, which means they are supposed to be able to fly the aircraft. They are there to pick up some polish, really. However colonel, your point about the right side having some decent experience is relevant I think. Nothing worse than the poor ****** in the right seat being "guided" by someone who has no F**king idea themselves.......
As has been pointed out before, if they F**K it up badly enuf for the right side driver to have to take over, then they won't be flying with me again..........
Colonel, be careful what you wish for.............