I have to agree. The IHSA is really strict/controlling on their rules. I went to state this year to watch and the mom's were on the lookout for pouty faces on the girls who had lost because apparently, their year round sportsmanship can reflect poorly to the IHSA or something crazy like that.
Illinois used to have the ICCA (Illinois Cheerleading Coaches Association)- I believe they're still around, and I think you can still participate in both state championships but it gets blurry. I just imagine the high school associations seeing dollar signs going down the drain if NCA/UCA tried to "take over". I would imagine some type of compromise, financially, would need to take place in order for this to happen.