Just read the article... It says your kid would be exempt from the curfew if he/she had a hand-written note from a parent or guardian... If you were concerned you could just give her a non-specific note and sign it at the bottom without a date.... What are the chances of her getting stopped or pulled over anyway?

You have to understand that your average officer on patrol is not going to be concerned with finding and arresting law-abiding teenagers just for the hell of it. They don't get any pats on the back for doing that kind of crap and the paperwork and time spent off the street is not worth it to them when they could be making more notable arrests...

The curfew law is designed to discourage teens from hanging out on the streets and to give the officers some legal justification to deal with the 'problem' kids, i.e. the ones with no parental discipline/guidance at home and some of which have known gang affiliations who spend more time on the streets than they do in their own homes.