Combination Seat: As a baby grows, this seat transitions from a forward-facing seat with a harness and tether into a booster. You could install the base with both a latch or simply a belt, so irrespective of your automobile, if it matches powering the seat, You need to use it. https://israelhbtka.eedblog.com/32909097/not-known-factual-statements-about-nhtsa-guidelines-for-car-seats