Final answer:
For a child 7+ years old and over 60 pounds, the use of a seat belt is generally acceptable if it fits properly; otherwise, a booster seat should be used.
Step-by-step explanation:
The required child restraint for a child who is 7+ years old and weighs more than 60 pounds varies based on specific laws that can differ from state to state. However, generally, at this size and age, the child has outgrown the need for a front- or rear-facing car seat and can instead use a booster seat or regular seat belt. For most situations, if the vehicle's seat belt fits the child properly across the shoulder and lap, it's acceptable for them to use it instead of a booster seat. The determination depends on whether the lap belt can lie snugly across the upper thighs, not the stomach, and the shoulder belt lies snug across the shoulder and chest, not the neck or face. If not, the child should continue to use a booster seat.