Yes, there is a Snell requirement for SCCA. iirc, it is 2 steps below the current release. Snell updates their requirements every 5 years. The last was 2000. This means that helmets with Snell 90, 95, or 2000 are valid for SCCA. Some local clubs are a bit more stringent, and have asked for SN95 or better, but I think SCCA says SN90 or better.
Good Luck
