Before this thread goes places we don't want to be, I would like to express my desire to not discuss F16's in a thread about F18HT's and ICCT. This kind of thing sort of quickly degenerates into a pissing contest, at least it often did so in the past.
With regard to your quesion. I'm sure that any crew from any class can be in the ICCT. There are certainly HT charters available, if not participantion slots. Such a crew would just have to lay down the money and do it.
I guess it all comes down to a personal wish to compete in an event like the ICCT and the willingness to pay the cost for such a campaign.
That is all,
Wouter