What vehicle seat belt systems are unsafe to use with the infant restraint?
Do not use lap belts with Emergency Locking Retractor (ELR), combination lap/shoulder belts with retractor, passive restraint systems with motorized shoulder belts, passive restraint systems mounted on doors, or lap belts forward of seat crease. (Page 51)
From the official Graco Graco 4ever User manual, page 51
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