* Important note (2011): The Australian Standard has been revised to require shoulder height markers on child restraints. These are in place of age and weight ranges. Restraints complying with teh new standard should be available soon. For older restraints use the above guidelines.
Note there is nothing to prevent rearward-facing child restraints for older children being sold in Australia - the Australian Standard provides for them. However, in general, they are not practical to use in the rear seat of most cars (the safest position for children) and there appears to be no market for them.