This doesn't seem like *entirely* the appropriate place for it, but here goes!!

A couple of years ago there were a lot of articles about that discussed rearward facing child restraints and how many countries have rearward facing until the age of 4, yet we allow it at 6 months or 7kg or whichever comes in whatever order (didn't matter for me, I kept mine rear facing until she was old enough to learn to unbuckle, then had to move her so that I could keep an eye on her and make sure she was still wearing a seatbelt).

The topic has been raised in twitter by someone absolutely incredulous at talk of increasing rearward facing age to 2 in the USA, and I wanted to point him at those countries whose laws are the age of 4, and what research and car seats they have available. Does anyone know any off the top of their heads, or where one might find some articles on such?

Thanks in advance!