Who must refuse hazardous materials that are not properly placarded?

The carrier must refuse hazardous materials that are not properly placarded. Proper placarding is essential for indicating the nature of the hazardous material and ensuring that everyone involved in the transportation process is aware of the potential dangers associated with the cargo. This requirement is crucial for the safety of the carrier, other road users, and emergency responders in the event of an accident.

When hazardous materials are not correctly labeled or placarded, it creates a situation where the carrier cannot safely transport the materials. The absence of appropriate placards may lead to misunderstandings about the contents of the shipment and can significantly increase the risk of accidents or spills. Therefore, it is the responsibility of the carrier to ensure compliance with hazardous materials transportation regulations, and they must refuse any shipment that does not meet these critical safety requirements.