How does it change the rules?
And no, Bartolini makes regular guitar pickups as well.
I'm talking in general how you can tell the difference.
Bump:
I did some investigating and went to Guitar Center and Sam Ash to ask some of the people there what I should do.
GC salespeople are fucking terrible, but I'm sure most people here knew that already.
A guy at Sam Ash had the theory that, if the pickups are truly passive while the pre-amp is active, then the guitar should still put out sound with no battery. I tried this with both of my guitars and got no sound, which would lead me to believe that the pickups in both are active pickups.