Which marking is essential for transporting hazardous cargo?

Transporting hazardous cargo requires a proper hazard classification mark, which is crucial for ensuring the safety of all individuals involved in the transportation process as well as the environment. This marking communicates vital information about the specific type of hazard associated with the cargo, such as whether it is flammable, toxic, corrosive, or reactive.

Having this classification mark visible and recognizable allows for immediate identification of risks in case of an accident or spill, guiding emergency responders in handling the situation appropriately. It ensures compliance with regulatory standards for hazardous materials transportation, which are established to protect public health and safety.

Although the other options provide useful information, they do not hold the same level of critical importance for safety and compliance during transport. The owner's name and shipping address are relevant for tracking and accountability purposes but do not convey the essential hazard information needed in an emergency. The Material Safety Data Sheet is important for detailed information about the hazardous materials but is not a marking on the package itself required during transportation.