Final answer:
The shipper must attach a diamond-shaped label to hazardous materials (hazmat) using the National Fire Protection Agency (NFPA) 704 Hazard Identification System, which provides important safety information about the substance being shipped.
Step-by-step explanation:
The shipper must attach a diamond shaped label to hazardous materials (hazmat) in accordance with the National Fire Protection Agency (NFPA) 704 Hazard Identification System. The hazard diamond provides important safety information about the substance being shipped, including details about its flammability, reactivity, health hazards, and other special hazards. The diamond symbol consists of four diamonds, each representing a different hazard category, such as fire hazard, health hazard, reactivity hazard, and special hazards. The shipper must label the hazmat based on its specific characteristics and hazard ratings from 0 to 4.