John. You are correct. I’d recommend reading the section in the SCCA rulebook pertaining to this: 4.13 INSURANCE RELEASE AND WAIVER. Specifically, any driver under the age of 18 must have both parents sign the Minor Waiver Form (found here) and witnessed by an adult SCCA member. Alternatively the form can be notarized. The form is good for all SCCA events for 1 year.
The driver would be registered at the event as part of our standard Novice Class and would be required to have one of our instructors ride along in the passenger seat.