Land Transport (Road User) Rule 2004, rule 11.1
If you ride a mobility scooter, you can’t ride on any part of the road if you’re able to ride on the footpath. If you do need to ride it on the road, you have to keep as close as possible to the edge of the road.
When you’re riding your mobility scooter on the footpath, you must be careful and considerate and not be a hazard to others. Skateboarders on the footpath have to give way to you.