Driver's license
The minimum driving age varies between 16 and 18 years of age in different States and Territories. After the minimum age, a graduated licensing scheme operates, with state variations.
Minor (law)
Driving certain large vehicles, acting as personal license holder for licensed premises, and adopting a child are only permitted after the age of 21. The minimum age to drive a HGV1 vehicle was reduced to 18. However, certain vehicles, e.g., steamrollers, require that someone be 21 years of age to obtain an operating license.