1506.00.00.00 - Other animal fats and oils and their fractions, whether or not refined, but not chemically modified

This HTS category, 1506.00.00.00, encompasses a broad range of animal fats and oils, along with their fractions, that have not undergone chemical modification. This includes products derived from various animal sources, such as lard, tallow, fish oils, and other animal-derived lipids, provided they are in their natural state or have been physically processed, like rendering or refining. The key distinction is the absence of chemical alterations, meaning reactions like esterification or hydrogenation are not permitted within this classification.

When classifying within Chapter 15, it is crucial to differentiate this category from others that may also deal with animal products. For instance, while other headings might cover live animals (Chapter 01) or their specific by-products not classified as fats or oils, this section is exclusively for the extracted fatty substances. Similarly, prepared edible fats that have undergone further processing or blending to create finished food products would fall under different headings. The focus here remains on the raw or refined animal fat and oil itself.

As this is a leaf node in the HTS structure, there are no further subcategories branching from 1506.00.00.00. Therefore, classification decisions within this heading rely heavily on identifying the animal source of the fat or oil and ensuring that no chemical modifications have occurred. Examples might include unrefined tallow from cattle, rendered lard from pigs, or crude fish oil intended for industrial or oleochemical use. Any further processing that alters the chemical structure would necessitate classification in a different, more specific heading.