This law extends a requirement that children under 2 years old must sit in an appropriate rear-facing child passenger restraint system, unless he or she is more than 40 pounds, or is taller than 40 inches, according to Assembly Bill 53.

The bill, which was signed in 2015, expanded the existing law, which stated that children under the age of 8 must be placed in an appropriate passenger restraint system while in a moving vehicle.