Simple: you don't have one person. When I raced with NASA, our class (Camaro-Mustang Challenge) had a national board of directors made up of a representative from each of the NASA regions, who was elected by the racers in that region. That board was responsible for all rules issues for the class. At regional events, the regional representative was responsible for assisting the tech staff with class inspections. It was basically like an SCCA ad hoc committee except we had actual rules-making authority for the class, with some oversight by the national office. It is a very effective system because it combines an element of democracy with the benefits of a benevolent dictator when necessary.