If the harness is below the child’s shoulders with the
headrest in the 4th highest position, the child weighs at
least 40 lbs. (18.1 kg) and is over 1 year old, convert
the seat to a belt-positioning booster
I'm watching a friend's twins this weekend and the straps on her seats are wrong so someone here gave me the link to the manual. No wonder we see one year olds in boosters!! The manual says it's ok. What are they thinking?
This is probably old news for most of you but it's really got me ruffled tonight. I'm not a big fan of the AO seats and love my Britax's even more.