Arizona already requires that children through age 4 use a child restraint system but the expanded requirement becomes law Aug. 20 under a bill signed Wednesday by Gov. Jan Brewer.
It makes violations subject to a $50 civil penalty, but it wouldn’t be imposed if the person later equips the vehicle with a restraint system.
The Arizona Automobile Association calls the legislation an important safety protection for children. The group says only two other states lack similar laws.
Arizona legislators blocked previous attempts because of objections about government intrusion and costs to parents.