Illinois Child passenger Safety Protection Act requires children ride rear-facing car seat until the age of two. According to Illinois car seat laws, children under 2 must be secured in a rearfacing child seat unless they meet certain requirements.Scheduling an inspection through the Illinois Keep Me in a Safe Seat Program. Find out car seat laws and booster seat laws in every state and make sure your child is strapped in according to national and state safety standards. Our general seat belt law requires everyone to buckle up. The Child Passenger Protection Act imposes specific requirements for kids under 8. If they're between ages 1 and 3 and weigh more than 20 pounds, children still have to be in a child restraint. Call 217-854-3854, press 8, for more information. 1, 2019, Illinois law requires children under age 2 to be properly secured in a rear-facing child restraint system unless they.