Sec. 4. When any person is transporting a child in this State under the age of 8 years in a non-commercial motor vehicle of the first division, any truck or truck tractor that is equipped with seat safety belts, any other motor vehicle of the second division with a gross vehicle weight rating of 9,000 pounds or less, or a recreational vehicle on the roadways, streets or highways of this State, such person shall be responsible for providing for the protection of such child by properly securing him or her in an appropriate child restraint system. The parent or legal guardian of a child under the age of 8 years shall provide a child restraint system to any person who transports his or her child.
For purposes of this Section and Section 4b, "child restraint system" means any device which meets the standards of the United States Department of Transportation designed to restrain, seat or position children, which also includes a booster seat.
A child weighing more than 40 pounds may be transported in the back seat of a motor vehicle while wearing only a lap belt if the back seat of the motor vehicle is not equipped with a combination lap and shoulder belt.
(Source: P.A. 95-254)
The American Association of Pediatrics (AAP) recommends children should ride rear-facing to age 2.