No, even though the kid is tAll there is still a big danger risk. They should always be in a booster or carseat.
A child has to be four - six years of age before being able to ride without a booster. It is weight dependant and most booster seats will tell you the maximum weight or age on the packaging.
8 years old
10 years
they have to be 12 years old
In Florida, a child can ride without a booster seat when they reach the age of 6. However, they must still be secured in a safety belt that fits properly. It's important to ensure that the vehicle's seatbelt fits the child correctly for their height and weight. Parents are encouraged to follow the manufacturer's guidelines for car seats and booster seats for the safety of their children.
If your talking about the booster seat without a back then NO, It is not safe for the child to ride with only a lap belt.
in all states a child has to be 4foot nine to be out of a booster seat. they can be in a booster sear at any age.
at age five
The Booster offers safe, comfortable rides for someones child. Moving from a car seat to a booster seat still helps the child remain safe, while riding comfortably in the booster seat.
In New York, children must use a car seat until they are at least 4 years old. Once they turn 4, they can transition to a booster seat until they reach 8 years old or a height of 4 feet 9 inches. After that, they may ride without a car seat or booster seat, provided they use a seatbelt. Always ensure they sit in the back seat until they are 13 years old for added safety.
In 15 years old
Different states have different regulations when it comes to how long children should ride in booster seats. Typically the average size and age is 4'9" tall and/or 8 to 10 years old. Check with your states guidelines to make sure your state's regulations are the same.