Land Transport NZ, Factsheet 7, Child Restraints, February 2009.
If you answer 'no' to any of these questions, your child needs to be in a booster (safety) seat.
1. Does your child sit all the way back against the car seat?
2. Do your child's knees bend comfortably at the edge of the car seat?
3. Does the belt cross the shoulder between the neck and the arm?
4. Can the child stay seated like this for the whole trip?
For more information visit http://safekids.org.nz/