Safety equipment is same as HPDE. Event is sanctioned and insured like HPDE. Car can be stock or modified, as long as the modifications pass tech. So, car just needs to pass a regular HPDE tech in advance and trackside:

http://www.nasaproracing.com/images/..._hpde_tech.pdf

Bring a legal helmet if you have one, otherwise we have a few loaners. All your other questions should be answered at the following links:

https://www.nasaproracing.com/event/1021

http://www.get-fast.net/nasacross/na...supps_2010.pdf

http://www.nasaproracing.com/rules/nasa-x_rules.pdf

If you are new to this (6 or less autocrosses in the last 24 months), your class is "Novice"... if you would like to read about the regular classing, it is detailed here:

http://www.nasaproracing.com/rules/nasa-x_classes.pdf

And once you know your car's base class from that link above, the classing worksheet is here:

http://www.nasaproracing.com/rules/n...ation_form.pdf

As for "It doesn't seem like the standard autocross rules would be sufficient."... what do you mean? It's similar to an autocross, but bigger and faster, and with no work assignments. Because it's on a roadcourse it is sanctioned & insured like HPDE, although it's not HPDE. Please let me know what your specific concerns are, I'm happy to address 'em.

Thanks,

Jon