What must a driver keep in the vehicle when transporting materials that require a Hazardous Material Safety Permit (HMSP)?

When transporting materials that require a Hazardous Material Safety Permit (HMSP), it is essential for a driver to keep a copy of the safety permit in the vehicle. This document is a legal requirement and serves as proof that the driver and the vehicle are authorized to transport hazardous materials. It may be inspected by law enforcement or regulatory agencies to confirm compliance with hazardous materials transportation regulations.

While other options are important for safety and compliance, they do not fulfill the specific legal requirement of having the HMSP in the vehicle. Keeping safety data sheets, contact numbers for emergency services, or a list of hazardous materials are certainly good practices for managing emergencies or ensuring awareness of the materials being transported, but the presence of the HMSP itself is mandated by federal and state regulations.