There is loads of other things than the mirrors for example there is some rule about a limited cost of repairing "bumpers". Repairing smaller parking accident should be cheap for insurance reasons. I don't get how Koenigsegg and a lot of other manufacturers ever fulfill these things. There is loads of regulations, making a car homologated seems like climbing Mount Everest!! There is probably a reason for that, not only safety.. To me it seems the regulations is also to "protect the market", the big guys over there don't want to compete with loads of different new small volume or low price products .. I think this is part an insurance and a possibility to make problems/resistance for undesirable entrys on the market. But it's probably not a big problem for Koenigsegg as long as they don't compete with one of the big manufacturers over there ..The only other potentially non-compliant thing I could imagine might be the mirrors, but really is that such a huge engineering challenge?