What I'm trying to figure out is if California has such a law (and if it was around in 1999, if they do). From what I can tell, there isn't one, but I also haven't been able to prove that the Illinois law does exist when I know it does/did, so I am not confident in my searching.
I've tried googling with various combinations of California(/Illinois), teacher, student, sex, statutory rape, law. Mostly I'm getting news articles and websites expressing outrage about teachers sleeping with underage students, which isn't what I'm looking for.