Under what circumstance does the shipper not need to certify that packaging was done according to the regulations?

The shipper is not required to certify that packaging was done according to the regulations when the driver is carrying the materials personally. This situation typically applies to an individual transporting hazardous materials for personal use, where the formal shipping and packaging certification requirements do not apply in the same way as they would for commercial shipments.

In this context, regulations that govern packaging and certification are primarily aimed at ensuring safety and compliance in a commercial environment, where hazardous materials are being transported for professional purposes. If an individual is personally transporting hazardous materials, they may be considered more like a personal possession rather than a commercial shipment, which does not necessitate the same level of regulatory scrutiny and certification as required for commercial shipments.

This understanding highlights the different responsibilities and regulatory frameworks for individuals versus commercial entities in the transport of hazardous materials.