Lexus 2008 IS250 Owner's Manual page 103

1-7. Safety information
STEP 2
Laws and regulations pertaining to anchorages
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Anchorages conform to FMVSS225 or CMVSS210.2.
Child restraint systems conforming to FMVSS213 or CMVSS213 specifications
can be used.
This vehicle is designed to confirm to the SAE J1819.
CAUTION
When installing a booster seat
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Do not fully extend the shoulder belt to prevent the belt from going to ALR lock
mode: ( P. 54)
ALR mode causes the belt to tighten only which could cause injury or discomfort
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to the child.
Do not allow the child to play with the seat belt or the child could be killed or seri-
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ous injured.
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Open the anchor bracket cover,
latch the hook onto the anchor
bracket and tighten the top strap.
Make sure the top strap is securely
latched.