I'm fighting with the insurance company right now around paying for a crashed car seat. It was in my dad's van when he hit a deer. There is significant damage to the vehicle and it is a non-Britax seat where the manufacturer recommends replacement after any crash. The Indiana law has a correct usage clause saying seats must be used according to the manufacturer's recommendations as well. The insurance company is quoting the NHTSA recommendations and saying they go by that unless state law differs. In my opinion, the Indiana correct usage clause and the manufacturer recommending replacement after any crash would qualify. But, is there anywhere official where I can get a blurb stating that the manufacturer recommendation trumps general guidelines and that the manufacturer knows its seats better than anyone?