booster seat isofix australia

Short answer: in Australia, ISOFIX lower anchors are for child seats with an in‑built harness; a booster seat generally uses the car’s lap‑sash belt plus a top tether, not ISOFIX. Since 2014, ISOFIX‑compatible restraints meeting AS/NZS 1754 are allowed, but that doesn’t turn boosters into clip‑in gadgets—boosters position the belt; the belt restrains the child. When your kid hits the booster’s height markers (often around 4–8 years), fit the booster firmly, attach the top tether, and route the vehicle belt exactly as the labels show. If you spot “ISOFIX‑style” connectors on a local booster, they’re usually for stability only, not the primary restraint—follow the seat manual and your state’s road rules.