1604.14.10.10 - In foil or other flexible containers weighing with their contents not more than 6.8 kg each

This HTS classification covers tinned or canned tuna and skipjack, specifically those packed in oil. The "in oil" designation is a key criterion, meaning the fish is preserved with oil as the primary liquid medium within the airtight container. This includes various types of oils such as vegetable oil, olive oil, or other edible oils.

This category is distinguished from its sibling, "Other," by the explicit inclusion of oil as the preservation medium. The "Other" subcategory would encompass tuna and skipjack preserved in brine, water, or other liquid media not classified as oil. Therefore, the specific type of packing liquid is the critical factor for differentiating between these two categories.

As this is a leaf node in the HTS structure, there are no further subcategories. Classification at this level is definitive based on the product being tuna or skipjack, presented whole or in pieces (not minced), packed in an airtight container, and specifically preserved in oil. The weight of the container with its contents, not exceeding 6.8 kg, is also a defining characteristic.