Have you gotten in trouble for not having them? If not don't worry about it. Here in Kalifornia it is supposedly a big deal yet I don't see anyone (including myself) that runs them and nobody gets stopped for it. Normally they will tack that on the ticket if they stop you for something else but they won't pull you over for not having them, it's not worth their time. My buddy has an extended cab 97 chevy running 37's and he got it tacked on to a ticket once and it was only some rediculous $5 (yeah 5) paper work charge and when it was over he took them right back off.
Basically what I'm saying is if you aren't stupid w/ your driving while on the road with everyone else and you don't have some rediculous backspacing that pushes them out 6"+ past the fenders I don't think you have anything to worry about.
Just my $0.02 on the topic.
-Avery