The distinction turns on origin: 9870003000 applies to goods that are Canadian in origin and are being returned to Canada, while 9870005000 covers goods of non-Canadian origin that were previously exported to Canada and are now being returned. Correct classification affects how the shipment is recorded in US export statistics and may affect duty drawback or USMCA origin claims.

If the goods are US-origin articles temporarily exported for exhibition, they may qualify for duty-free re-importation under HTS 9801 provisions upon return. However, the specific conditions depend on whether the goods were altered or processed abroad. Exporters should document the goods' condition and value before export to support any future re-import claim.