For National Events, Unlimited Category vehicles must be based on production automobiles and bear a noticeable resemblance to their production counterparts.

1. Kit cars and reproductions listed in Max Category are eligible for Unlimited Class.

2. There will be two classes in National Unlimited Category Competition—Unlimited 1 and Unlimited 2. Both classes must be production-based.

3. Full-scale tube-frame Grand Touring (GT), Production (P) and Prepared-Class cars are considered “production based.”

4. If Regions run under National Events Classing, and include a non-production class for Unlimited Category vehicles, it is recommended that Regions run the suggested classes for Formula Cars, Sports Racers and Specials.