Final answer:
The shipper is responsible for correctly naming, labeling, and marking a Haz-Mat shipment, with oversight and enforcement from the United States Department of Transportation.
Step-by-step explanation:
In the context of hazardous materials (Haz-Mat) shipments, it is the responsibility of the shipper to correctly name, label, and mark the shipment. However, there are regulatory bodies and agencies that oversee and enforce compliance with these requirements. One such agency is the United States Department of Transportation (DOT), which has hazardous materials regulations in place.