0406.90.99.00 - Other

This HTS category, 0406.90.99.00, serves as a residual classification for cheeses and curds that do not fit into more specific subheadings within Chapter 4. It encompasses a broad range of cheeses that are not otherwise defined, including those that are grated, powdered, or in other forms, provided they do not contain mixtures of cow's milk cheese (excluding soft-ripened varieties) as specified in sibling categories. The "Other" designation signifies its role as a final catch-all for processed or mixed dairy products that meet the general definition of cheese or curd but lack distinct characteristics to be placed in a more granular classification.

The critical distinction of this subheading lies in its exclusion of specific types of cheeses that are separately enumerated, particularly those containing cow's milk in certain configurations. For instance, if a cheese is predominantly cow's milk-based and falls under the criteria of the immediately preceding sibling category, it would be classified there rather than here. Similarly, any cheese mixtures that are specifically described under subheadings 0406.90.61 or 0406.90.63 are explicitly excluded, reinforcing the residual nature of 0406.90.99.00.

As this subheading is a leaf node, there are no further subdivisions. Therefore, classification into 0406.90.99.00 relies on a thorough examination of the product's composition and a process of elimination against all more specific HTS provisions for cheese and curd. Importers should carefully consider the specific formulation, production method, and any pre-existing mixtures to ensure that the goods do not qualify for a more precise classification before resorting to this general "other" category.