At the risk of exposing myself as an
unprofessional/gullible ... "Cathay freighter pilot"
I must agree with Peter613 (much as I dislike agreeing with a gentleman who treats his colleagues with such disdain).
The ULH definition can certainly be interpreted both ways, while 15.4 only applies to Normal Ops to begin with (so to my mind should not be used to define whether a flight is ULH or not).
But the big clue for me is in the Commander's Discretion Report form: if you grab one, you will notice that it clearly specifies "Time Zone Change of Six Hours or More" as the (sole) distinguishing factor between Normal Ops and ULH.
The fact that they have been rostering ORD-AMS as two-man so far just means that CX haven't noticed yet either, or that they're "trying it on"... either one of these options doesn't really stretch credulity IMHO
.
MD (also ready for a serving of humble pie if required!)