Preferential duty claims require documented origin criteria, value content, tariff classification, cumulation and direct consignment. Importers claiming preferential duty must maintain documentary proof and exercise reasonable care to show goods meet the rules of origin: wholly obtained status or qualification via Change in Tariff Classification, Regional/Domestic Value Content, or process rules. For non originating inputs, importers must identify each component, verify third party origin where procured, and record use of de minimis, cumulation, packing/neutral element treatment, direct consignment compliance, and any retrospective proof of origin. Form I prescribes fields for importer, bill of entry, production description, origin criterion, and detailed input schedules.