BMWCCA is very similar to SCCA when it states that other preperation levels are allowed with no cross preperation. SCCA allows IT cars to compete in autocrosses in their street prepared classes is COMPLETE IT TRIM--PERIOD. You may not pick and choose from the two sets of rules to get the best of both. The best bet for you BMW guys is to petition BMWCCA to allow you to compete without the restrictor as you will be racing with cars that have a proven comperable performance as proved in the past. In that series you compete against cars with a higher level of prep--this is not true in SCCA.