Since SpecMiata went National it is no longer philosophically eligible for "the National Championship event for non-National classes". You can (obviously) run your SM in ITA, but for 2006 we are also adding SSM (using the WDC/NEDIV rules) and ASM ("ARRC Spec Miata"). ASM is current SM rules, but no spec tire (i.e. - the GCR definition of Regional SM) with the additional caveat that anyone running SM at the Runoffs cannot run ASM in the ARRC championship race on Saturday.
The ARRC Committee will be meeting at Road Atlanta this weekend to confirm the final details, but "Miata Madness" will be a Pro Shootout style race for Miatas only on Sunday. $250 to enter ($140 goes toward the prize fund), 20-lap race, payback to the top ten per class. All Miatas: ITA, ASM, SSM and (depending on whether or not I can sell it to the Committee), SPU should someone show up with an EP (for example) Miata and a checkbook.
So yes, your ITA Miata can run:
Pro-IT Friday afternoon
Championship race on Saturday
"Miata Madness" Sunday morning
Enduro Sunday afternoon
We're also planning to add ITO and ITU to the mix this year as well, but I'll "officially" post that after the meeting this weekend. ITO is what most of the rest of the country calls ITE and will run with the big bore cars. ITU is same concept, will run in Group 1 (along with SPU, ITT, SRX7, GTP and SSM) and covers things like WC Touring, NASA Honda Challenge, etc. ITO/ITU will be like SPO/SPU but for production-based cars on DOT tires.
More after this weekend, but hopefully this helps...
Butch Kummer
Atlanta Region Competition Director
2006 ARRC Event Chairman