Blended edible fat and oil preparations not elsewhere specified — such as cooking shortenings, specialty frying compounds, and mixed-origin fat systems — occupy this residual category after heading 431.2 preparations are excluded. The 'not elsewhere specified' scope means classification here is often reached by elimination, requiring importers to confirm that the product does not fit a more specific heading before applying this code. Composition documentation, including the ratio of animal to vegetable fractions and any added emulsifiers or flavorings, is critical for both classification and FDA food-labeling compliance. Because the category is broad, duty exposure and any applicable trade-remedy measures depend heavily on the precise fat blend and country of origin.

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