What is the required supervisor age difference for Class 6L versus Class 8L motorcycle learners?

1. Class 6L supervisors must be at least 25, while Class 8L supervisors may be 19 if fully licensed
2. Both types of supervisor may be 16 if they hold a full-privilege motorcycle licence and stay in sight
3. No minimum supervisor age applies once the learner has passed the knowledge test and vision screening
4. Class 6L supervisors must be at least 19; Class 8L supervisors must be at least 25