Originally Posted by chrismattlin:
I'm not 100% sure, but I think it has something to do with the race being in conjunction with the IRL event. I believe this used to be true also at PIR; when the Copper World was ran in March with the IRL.
....not sure exactly why, though.
I'm about 90% sure - Phantom tobacco (Marlboro) sponsorship of Team Penske. All drivers competing this weekend must be 18+.