Quote Originally Posted by GhostRL
No. Nowhere in the book is a DOT helmet accepted. 13.49 or faster, snell 00' helmet, and all verts.
But do these rules apply only to NHRA events or to all events including test and tune?

Most tracks will allow any kind of helmet, or just not require one at all, if you're running slower than a 13. Not sure about Commerce's rules though.