At the 10-digit level, US tariff schedules distinguish among bags made of different polymers (e.g., polyethylene, polypropylene, other plastics) and by construction (e.g., woven versus non-woven). Importers should specify the exact resin type and manufacturing process on the commercial invoice to ensure accurate classification and avoid CBP reappraisement or penalty for misclassification.

Plastic bags sold at retail in the US must be marked with the country of origin in a conspicuous location, either on the bag itself or on its retail packaging, in accordance with 19 CFR Part 134. For bags imported in bulk and repackaged domestically, the importer must ensure that the marking requirement is satisfied before the goods reach the ultimate purchaser. Failure to mark correctly can result in CBP withholding of release or assessment of marking duties.