In Illinois, the law states that each driver and front seat passenger of a motor vehicle must wear a properly adjusted and fastened seat safety belt.
Provides that whenever a person is transporting a child under age 8, the person is responsible for properly securing the child in an appropriate child restraint system, which includes a booster seat. Every person, when transporting a child 8 years of age or older, but under age 16, is responsible for properly securing that child in a seat belt. If the vehicle used to transport children under eight years of age is equipped with lap belts only in the back seat and the child weighs more than 40 pounds, the child may be transported in the back seat wearing a lap belt only. If a combination lap and shoulder belt is available, the child must be secured in a booster seat. 
The Illinois Graduated Licensing System requires all passengers under 18 years to buckle-up when riding in a vehicle being driven by a person under the age of 18. Any person under the age of 18 who receives a graduated driver’s license, for the first six months of the license or until the person reaches the age of 18, whichever occurs sooner; the person may not drive with more than one person in the vehicle who is under the age of 20 unless they are siblings, children, step-siblings, and step children of the driver. 
Also, no person may operate any 1965 or later model vehicle unless the front seats are equipped with two sets of safety belts.A child must be protected under these Child Passenger Protection Act guidelines