How often must a person transporting dangerous goods be trained?

The correct answer indicates that a person transporting dangerous goods must be trained as often as regulations require changes. This approach is essential because the transportation of dangerous goods is governed by specific regulations that can evolve over time due to safety concerns, environmental considerations, or updates in legal frameworks.

When regulations change, individuals must be informed and re-trained to ensure compliance and maintain safety standards. This training ensures that the transport personnel are aware of the latest safety protocols, handling procedures, and emergency response strategies that are essential for preventing accidents and ensuring public safety. Staying current with regulations is critical in this field, as non-compliance can lead to severe consequences, including legal ramifications and increased risk of incidents during transportation.

The other options suggest less frequent training, which doesn't account for the dynamic nature of regulations surrounding dangerous goods. Relying on a once-in-a-lifetime or only job-start training approach would leave individuals out of touch with necessary, potentially life-saving knowledge they need to safely carry out their duties over time.