0511.99 - Other:

This category, HTS 0511.99, encompasses "Other" animal products not elsewhere specified or included, specifically those dead animals of Chapters 1 or 3 that are unfit for human consumption. It serves as a residual classification for a variety of animal-derived materials that do not fit into more specific headings within Chapter 5.

Distinguishing this category from its sibling, 0511.91, is crucial. HTS 0511.91 specifically addresses products derived from fish, crustaceans, mollusks, and other aquatic invertebrates, along with dead animals from Chapter 3. HTS 0511.99, therefore, is reserved for terrestrial animal products or other categories of dead animals that are not covered by the more specialized provisions of 0511.91.

Within HTS 0511.99, further subcategories exist to provide for more granular classification. These include parings and waste from raw hides and skins, glue stock, and various products primarily intended for animal consumption or as ingredients in animal feed. Additionally, natural sponges of animal origin and horsehair, in various preparations, are specifically itemized. Finally, a further "Other" subcategory exists to capture any remaining items that fit the broader scope of 0511.99 but are not otherwise enumerated.