What are the weight limits for rear-facing and forward-facing positions on the Graco 4Ever DLX 4-in-1 car seat?

Infants weighing less than 22 lb (10 kg) MUST use this car seat rear-facing, and the rear-facing position supports children up to 40 lb (18 kg). Children should ride rear-facing as long as possible until they reach the maximum rear-facing height or weight rating. After that, children should ride forward-facing using the built-in harness system until they reach the maximum forward-facing weight or height. (Page 2)