Looks like this link has some good info.
Child restraint laws
For Florida specifically, it just says that a rear facing car seat should not be placed on a seat with an active airbag. To that, I ask this question, for cars with curtain side airbags...how safe is a child in the back seat? My guess is no safer than in the front seat...
Also pulled this up:
http://sheriff.org/safety/carseat.cfm
It's for Broward County specifically so I'm wondering if child safety laws differ from county to county...?