What is the legal regulation regarding driving on the road shoulder (verge) to the left of the yellow edge line?

1. It is reserved for emergency stopping and breakdown use, and must not be used as a driving lane
2. It may be used as a regular driving lane whenever there is heavy traffic congestion
3. It is an express lane for public service vehicles and minibus taxis (kombis)
4. It may be used for continuous driving at speeds above 80 km/h