Hi
This is our third year showing so we are still beginners really, but as far as I am aware:-
AOC - Any other standard bred colour (there is normally a non-standard class for non standards. At large shows the individual breed usually has its own non-standard class, and at small shows there is normally a non-standard class for all breeds). We specialise in Orpingtons and in our case the AOC is any other Orpington which is not buff, because the buffs have their own class. My understanding is that if I were to enter a non-standard Orpington in the AOC class, it would usually be disqualified or passed over.
Pen Training. There will be many ways of approaching this but what we do is put them in a rabbit hutch with thick wood shavings or miscanthus about 2-3 weeks ahead of a show because they will have had little handling. I start by touching/stroking them every time I feed/water and also in the evenings (especially if there is nothing on the telly); when they are used to that I pick them up and handle them several times per day. I might try getting them to eat titbits from my hand at the same time. This is actually the most enjoyable part of the year for me, when I am developing a relationship with each show bird. After the show they go into quarantine for a week with extra vitamins, and after that into a more spacious pen. I repeat this for subsequent shows but just for a week. We always aim to shampoo by the Tuesday before the Show at the latest, with a foot scrub/bum wash (if necessary) the day before the show.
Hope this helps. I am sure people would love to see piccies of your prospective competitors!