Under the Road Traffic Law, what is the position when a learner practises on a public road with an instructor?

1. Practice without an instructor and a training vehicle is not allowed, and during practice the instructor counts as the driver and carries full responsibility for the learner
2. The learner alone bears responsibility once the engine is running
3. A learner may practise unaccompanied provided the machine displays a learner sign
4. Responsibility rests with the owner of the vehicle regardless of who is aboard