What type of emergency information must be on or within a cargo tank motor vehicle during delivery operations?

The correct choice is that written procedure instructions must be on or within a cargo tank motor vehicle during delivery operations. This requirement is essential to ensure that drivers and emergency responders have immediate access to relevant procedures in case of an emergency related to liquefied petroleum gas (LPG).

Written procedure instructions include vital information pertaining to safety protocols, response actions for various emergency scenarios such as leaks or spills, and any specific operational guidelines that must be followed during delivery. Having this information readily available is crucial for minimizing risks and responding effectively to unexpected situations. It ensures that all personnel involved are well-informed and prepared to handle potential emergencies, which ultimately promotes safety and compliance with the NFPA 58 standards.

While emergency contact numbers could also be considered important, they are not explicitly mandated to be displayed on the vehicle itself. Similarly, exit routes and estimated delivery times, while useful for logistical planning and safety, do not carry the same immediate necessity in the context of emergency preparedness as written procedure instructions.