Which of the following listed documents must you have with you, if you want to drive a passenger bus in occasional service within national boundaries?

When driving a passenger bus in occasional service within national boundaries in Germany, you are required to carry specific documents as part of the regulations that ensure safety and compliance with traffic laws.

The instrument of approval is vital because it certifies that the bus is approved for passenger transport. Without this document, you could be driving an unregulated vehicle, which may pose safety risks.

Your driving license is essential as it verifies that you are legally permitted to operate a passenger bus. This helps ensure that only qualified individuals are behind the wheel.

While the insurance certificate is also important for any vehicle on the road, it is not specifically required for this type of service in the context of the question. Therefore, it is not included in the correct combination of documents needed for driving a passenger bus in occasional service.

Understanding the necessity of each document helps in compliance with German traffic regulations and guarantees the safety of passengers and drivers alike.