Per Art Verlengiere, I.K.F. Region 7 Coordinator:

An I.K.F. Kid Kart (age 5 – 7) competitor who also competes in the Rotax Micro Max (attained age 7 – 10) class will be allowed to participate in both the I.K.F. Kid Kart class and the Rotax Micro Max class. The I.K.F. rulebook precludes competitors from moving up in age class and then back down. This remains true for all I.K.F. classes, however, since Micro Max is a Rotax class, this rule does not apply.

Example: If the competitor was running a Gatorz race on Saturday and an I.K.F. race on Sunday there would be no conflict. This is the only class this will apply to and only at this series.

Therefore “A competitor in the 2011 Cal State Karting Championship series can run the Micro Max class (attained age 7) and the Kid Kart classâ€