When must a driver put on a high-visibility reflective safety vest (svjetloodbojni prsluk) when stopped due to a breakdown on a public road in Bosnia and Herzegovina?

1. Before stepping out of the vehicle onto the carriageway outside settlements, expressways, or motorways
2. Only after setting up the warning triangle 100 metres away
3. Only when requested to do so by a police officer
4. Only during nighttime hours in heavy fog