What happens if a heavy vehicle driver is directed to stop work by an authorised officer during a roadside inspection because they are found to be impaired by fatigue?

1. The driver may continue after taking a 30-minute break
2. The driver may continue if they have not reached their maximum work hours
3. The driver must stop work and must not work again for the period specified by the officer, which may be up to 24 hours
4. The driver's employer must be contacted before the stop-work order takes effect