Child Safety Seat Restraint System
The purchase of a used seat is not recommended. Due to the aforementioned concerns regarding expiry dates, crash testing, and recalls, it is often impossible to determine the history of the child restraint when it is purchased second-hand.
Children traveling by plane are safer in a child safety seat than in a parent's arms. The FAA and the AAP recommend that all children under 40 lb use a child safety seat on a plane. Booster seats cannot be used on airplanes because they don't have shoulder belts.
By law every child restraint sold in Australia must carry the Australian Standard AS/NZ1754 sticker (pictured right). Most overseas child restraints, including restraints from Europe and the USA, do not comply with these Standards and cannot legally be used in Australia. This also applies for ISOFIX child restraints imported from Europe or the USA.
Group 0+ car seats commonly have a chassis permanently fixed into the car by an adult seat belt and can be placed into some form of baby transport using the integral handle if it is the specific model. Rear-facing child seats are inherently safer than forward-facing child seats because they provide more support for the child's head in the event of a sudden deceleration. Although some parents are eager to switch to a forward-facing child seat because it seems more "grown up," various countries and car seat manufacturers recommend that children continue to use a rear-facing child seat for as long as physically possible
Convertible seats can be used throughout many stages. Many convertible seats will transition from a rear-facing seat, to a forward-facing seat, and some then can be used as a booster seat. Many convertible seats allow for 2.3–18 kg (5-40 lb.) rear-facing, allowing children to be in the safer rear-facing position up to a weight of 18 kg (40 lbs).
Booster seats lift the child and allow the seat belt to sit firmly across the collar bone and chest, with the lap portion fitted to the hips. If the seat belt is not across the collar bone and the hips, it will ride across the neck and the stomach and cause internal injuries in the event of a collision.
(6) the person is operating a commercial vehicle registered as a farm vehicle under the provisions of Section 502.433 that does not have a gross weight, registered weight, or gross weight rating of 48,000 pounds or more; or
If an approved CRS, for which a ticket has been purchased, does not fit in a particular seat on the aircraft, the airline is responsible for accommodating the CRS in another seat in the same class of service. The airline may have polices that dictate the specific safe seat locations for specific aircraft. See Regulatory Requirements Regarding Accommodation of Child Restraint Systems (PDF) to learn more. However, a CRS may not be used in oblique seats in certain premium class cabins. FAA guidance (PDF) to airlines explains this prohibition.
Straps on the harness should be snug on the child, parents should not be able to pinch the straps away from the shoulders of the child. The straps also need to be placed at the proper height for the child.