Is a taxi driver exempt from wearing a seat belt while driving?

1. Yes, but only on urban roads, also when there are no passengers in the taxi.
2. Yes, but only on interurban roads.
3. Correct answer: Yes, but only on urban roads, when there are passengers in the taxi.
4. Yes, but only if it is specifically indicated by a traffic sign.

WhyA taxi driver may go unbuckled only in town and only while carrying passengers. Empty or outside town, they buckle up.