I am no expert. :)
I believe Nissan & Toyota both defer to the LATCH limits of the restraint in use. With the new guidelines, I think you can only use LATCH if your child + the weight of the seat is under 65lbs.
I have no ordered my 2013 LATCH manual yet though, so I can't look it up in there. I will double check and get back to you. :)