In addition to shipping papers, where else must the hazardous material identification number appear?

The hazardous material identification number must appear on cargo tanks and all bulk packaging to ensure that the materials being transported are clearly identified and can be handled appropriately in the event of an emergency. This is crucial for first responders and transport personnel to know exactly what substances they are dealing with, which helps in planning the appropriate response to incidents involving hazardous materials. Including the identification number on these packaging types aligns with regulations designed to enhance safety and communication during transportation, making it easier to manage risks associated with hazardous materials.

Other options listed do not fulfill the regulatory requirements for the placement of the hazardous material identification number as comprehensively as the correct response does.