Why are "emergency contact numbers" important on shipping papers?

Emergency contact numbers are crucial on shipping papers because they ensure immediate access to assistance and information in the event of a hazardous materials incident. In the case of an emergency involving hazardous materials, having the correct contact information readily available allows first responders, emergency personnel, and anyone involved in the incident to quickly reach trained specialists who can provide vital information on how to safely handle the materials, potential health risks, and proper emergency procedures. This prompt communication can significantly mitigate risks and improve response effectiveness, ultimately protecting people, the environment, and property.

The other options do not capture the primary purpose of emergency contact numbers. While providing contact information for the shipping company may be useful, it does not address the urgency and critical need for safety during an incident. Options relating to sales customer relations or informing authorities about shipping schedules lack the focus on immediate emergency needs that the correct answer emphasizes.