Unlike forward-facing car seats, which are attached to the vehicle with either a bottom tether or top LATCH system, booster seats are not attached to the vehicle. The vehicle's seatbelt functions as the restraint, securing both the booster seat and the child.
Do backless booster seats need to be anchored?
Booster car seats need to be anchored, but the car model will determine if this is possible or not. Latching the seat into place requires one to pay critical attention to the directions provided by the manufacturer on the manual.
Do all booster seats need to be anchored?
Children from four to seven years of age can only sit in the front row of a vehicle with two or more rows when all other seats are occupied by children younger than seven in an approved child restraint. If the booster seat comes with a tether strap, it must be anchored to the child restraint anchorage point.