DO NOT use shoulder belt 
loose or positioned under arm. 
Lap portion of lap/shoulder belt MUST be low and snug on hips, just touching thighs.
DO NOT allow child to slide down in booster seat. This could position vehicle lap belt across child’s abdomen and vehicle shoulder belt over neck or face. If child will not keep vehicle restraint properly positioned, DO NOT use this booster seat. Use a different child restraint system.
6.1 Removing the Built-in Harness
The harness of your car seat must be removed when your child’s shoulders are above the upper harness slots or when your child weighs more than 40 lbs. (18 kg). When removing the harness, be especially careful to keep all the parts on the belts. By keeping these very important parts together, they can be reinstalled on the seat for use with another child. Carefully follow the instructions below.
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