Height And Weight Requirements For Booster Seats Is There An Age Requirement For A Child To Sit In A Booster Seat?

Is there an age requirement for a child to sit in a booster seat? - height and weight requirements for booster seats

I have a 3-year-old son who is about 30-35 pounds, he has a car seat, in the head with a 5-point harness and is now too big for him coming. I know I can put a regular booster seat. It meets the requirement of size and weight to the rear of the booster dose, but was not sure whether it is a challenging age. I live in Tennessee. Thank you!