Here would be my Rule's for competition for a rookie or under 18 driver

The guys that normally run USAC, Champions ETC all have run with them at other tracks at some point and often much more than just once or twice.

A Panel of
FIVE or Ten USAC Regulars, Past champs or top fives. would have to vouch to the kids cleanliness of driving and maturity. Does the kid throw temper tantrums, Make stupid moves, Throw steering wheels. That same panel should also have the right to SUSPEND or REMOVE the privilege to run USAC sanction events, No refunds either

The panel could also have USAC officals who have worked lower forms of racing, 25s. TQ's. etc. To vouch that tey have consistently behaved and raced in a acceptable manner.

Ive always been under the impression that it was USAC's Insurance that determined the age limit.