As they say, RTM.
http://scca.cdn.racersites.com/prod/assets/2012GCR-updatedJuly1.pdf
http://scca.cdn.racersites.com/prod/assets/2012_Solo_Rules_May.pdf
I'm sure you could eventually find a club that would let you auto-x your CX-5 but I wouldn't count on it. Even most small independent...