I have always believed that cars with integrated bumpers were able to install an air dam that falls within the 'vertical shadow' of the car - including the integrated bumper cover.

However, reading the rules now, and then going and checking my old ITCS books to see if it was changed, I don't know if I see that in the rules, only that it can be attached to the bumper cover.

It seems odd, as on some cars this could require some pretty funky air dam location/designs. Am I missing something?