If you check the NJ BMW CCA website, section "Forms" (http://www.njbmwcca.org/services/fil....php?type_cd=F
), you will find some great reference material. For example, if you take a look at page 3 of the "Tech FAQ" doc, you will learn that SNELL rated helmets are classified as "M" (no, not for BMW M3
...but for Motorcycle) and "SA" for Special Applications. The helmets for Car driving, fall i the latter category.
I would recommend you also read the "Driver School Handbook". See both docs below as PDFs but make sure to check if new versions are available on the CCA website.
Hope to see you soon on the track!