Baby car seat age requirements

Proper use – This means the car seat is being used based on instructions for that particular car seat. These instructions include installation, use child meets the size requirements.
Federal approval – This means the car seat meets the federals standards set in FMVSS 213. Car seat manufacturers self-certify that the car seat meets federal standards by crash testing the child restraint to ensure it meets certain crash criteria.
And/Or – If the law says “and” this means the child needs to meet both (or all) criteria set in the law. “Or” means the child can meet one criteria or the other

Alabama

Alabama Car Seat Law (32-5-222)