What is the statutory procedure if a heavy commercial truck experiences a mechanical breakdown on a public road in Bosnia and Herzegovina?

1. Activate hazard warning lights, put on high-visibility reflective vest before exiting cab, place warning triangle at least 50m behind (100m on motorways), and contact roadside assistance
2. Leave the truck in the center of the lane and walk away to find a restaurant
3. Place the warning triangle on the roof of the cabin
4. Wait inside the cab with all lights turned off