Primary source: https://www.sa.gov.au/topics/driving-and-transport/roads-and-traffic/seatbelts-and-child-restraints
South Australia’s public page states that all children under sixteen must be restrained in a suitable approved restraint that is properly adjusted and fastened. The page then becomes specific about type and seating position.
From six months to four years, a child must not travel in the front seat of a vehicle with two or more rows, and must use an approved rearward-facing infant restraint or a forward-facing seat with an inbuilt harness. From four to seven, the front row remains off limits unless all other seats are occupied by children under seven, and the restraint must be a forward-facing harness seat or a booster with a lap-sash belt or child safety harness. From seven to sixteen, the child uses an approved child restraint suited to their size or a properly adjusted seatbelt.
SA.GOV.AU also reminds readers that the product must comply with the Australian Standard and carry the mark, and that the aim of the law is to reduce injury from restraints that do not match a child’s size. That is a useful sentence to read twice if someone in the family wants to “move them up because they look big enough”.
For fittings, use Kidsafe SA and the CREP station finder. For recalls, use the ACCC. For arguments about a particular model, use the label — not this paragraph.
## After you read the local page
Come back to the national explainers if you need the “why”, not only the “what”. Ages and stages explains the shared bands. AS/NZS 1754 explains the mark. Travel and taxis collects hire-car and taxi differences so you do not mix NSW wording with Tasmanian wording.
If you are moving interstate with the same seat, the seat does not need a new mark — the Standard is national — but the taxi and penalty conversations do need a new tab.
This page is general information for Australian readers. It is not safety advice, a product ranking, or a fitting service. Always read the restraint label and the manufacturer instructions, confirm the current rule with the road agency in the state or territory where you are driving, and have the finished install checked by an authorised fitter.
Live source: SA.GOV.AU.
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Country distances and borrowed cars
Long SA distances tempt people to move a child up a stage “so we have more space for water”. Space is a packing problem. Stage is a label problem. Borrowed station wagons still need tether anchorages. A fitter in Adelaide cannot bless a car they have not seen in Port Lincoln, but they can teach you what to look for before you leave.
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How this state page should be used on a Tuesday
Print or bookmark the live agency link at the bottom of the page. If you are standing beside a car, you want the agency wording, not our paraphrase. Use this explainer to understand how the local page sits on the national model: the same four age doors, the same front-row caution in multi-row vehicles, and the same insistence on an AS/NZS 1754 mark.
Then do the physical checks this site repeats everywhere. Look at the shoulder markers. Look at the tether. Look at whether the seating position is a lap-sash position if you are using a booster. If you are about to cross a border later in the week, open the next state’s page before you treat a taxi exemption as portable.
If a family member forwards a social-media graphic that “summarises the law”, compare it with the agency page. Graphics drop exemptions, taxi notes and the stay-in-stage sentence. This page exists to put those pieces back.
For fittings, use Kidsafe and the CREP station finder rather than a random workshop. For recalls, use the ACCC. For consumer tests, use CREP after — not before — the Standard mark. That order does not change because you changed postcode.
Finally, remember the dual disclaimer. This is general information. A fitter who can see your child and your car outranks a carefully written map.