What does lane filtering mean in NSW, and who is permitted to do it?

1. Moving between lanes of traffic at any speed; all riders including learners may do it
2. Moving between lanes of slow or stopped traffic at less than 30 km/h; only fully-licensed riders may do it
3. Riding on the painted median strip to pass stopped cars; permitted for P2 riders
4. Riding between a vehicle and the kerb at less than 30 km/h; permitted for all riders