It’s the law in New Zealand that all children in cars must travel in a child restraint until at least their 7th birthday. If there is a child restraint available in the car, they must use it when travelling until they turn 8.
As the driver, you are responsible for making sure that any child under 7 years old is properly restrained in a car seat that’s appropriate for their age. Children must not travel in the car if you can’t put them in an approved child restraint.
Approved child restraints include: