Josh-
I'm not sure what research you have performed to answer your question but traditionally the first ICSCC PIR race is non chicane. You might try using the club contacts provided on this website to achieve a more complete answer.
But no matter what the answer comes back with you are always allowed to race with whoever you feel meets your needs. I'm not sure of your comment intent but in my opinion it is unwarranted. Of course this is my opinion and not necessarily representative of others.
Duane