All three lines cover fresh or chilled Chinook salmon excluding fillets, livers, and roe, but they split by production method: 0302130012 is the broader pre-split line, 0302130013 covers farmed Chinook specifically, and 0302130014 covers non-farmed (wild-caught) Chinook. Importers must confirm whether the fish was aquaculture-raised or wild-harvested, as this determines the correct 10-digit classification and may affect applicable duty rates.

A commercial invoice identifying the species by common and scientific name (Oncorhynchus tshawytscha), a catch certificate or aquaculture certificate of origin, and a seafood HACCP compliance statement from the foreign processor are standard. For wild-caught fish, some trade partners also require harvest vessel and fishing area documentation to satisfy traceability requirements. Classification admissibility is complex; consult a licensed customs broker or the relevant agency.