You aren't dragged into the office for being unacclimatised in the above scenario, you're dragged in because they are nasty, bullying c***s and want to stamp out any dissent or resistance.
They know their own definitions and they know the point that's being made and they don't like it because they're trying to do something and appear legitimate and pilots undermine the effort by applying their own rules in black and white. Of course they ignore the need to be acclimatised before the ULR return sector, because it's a "trip" not a flight.
The whole "acclimatised" concept is naff considering this airline flies around the world and around the clock. Three nights to become acclimatised is BS when you've just done a ULR (or two) or a night turnaround followed by day trip.
I wish those confused here would learn the FTLs because knowing the rules occasionally allows you to beat "them" at their game.