What is the LATCH/UAS weight limit for this car seat?

Do not use the LATCH/UAS lower anchors when restraining a child weighing more than 15.9 kg (35 lbs) in rear-facing mode or more than 18 kg (40 lbs) in forward-facing mode — only use vehicle belt installation beyond these weights. You must never use both the LATCH/UAS connectors and the vehicle seat belts at the same time. Always use the tether strap with any installation method. (Pages 29, 74)