9903.85.72 - Derivative aluminum articles of Mexico enumerated in U.S. note 19(a)(iii) to this subchapter, containing primary aluminum for which the primary country of smelt, secondary country of smelt, or country of most recent cast, is China, Russia, Belarus or Iran

This HTS category, 9903.85.72, specifically addresses derivative aluminum articles originating from Mexico. The critical defining characteristic for goods falling under this classification is that they contain primary aluminum where the country of smelt, the secondary country of smelt, or the country of most recent cast is identified as China, Russia, Belarus, or Iran. This provision is a temporary measure implemented under Section 22 of the Agricultural Adjustment Act, imposing additional import restrictions.

Unlike other categories within the HTS, which might classify general aluminum articles or finished goods based on their inherent material composition and function, 9903.85.72 is distinct due to its focus on the origin of the *primary aluminum component* within a derivative article made in Mexico. This is a crucial differentiator, as it targets the upstream sourcing of aluminum rather than the final product's form or end-use. Therefore, an aluminum bicycle frame manufactured in Mexico would be classified here if its primary aluminum content originated from one of the proscribed countries, even if the frame itself is a finished good.

As a leaf node, this category does not have further subdivisions. Classification hinges entirely on meeting the specific criteria outlined: the article being a derivative aluminum product from Mexico, and the primary aluminum's smelt or cast origin being China, Russia, Belarus, or Iran. Importers must meticulously track and document the country of origin for the primary aluminum used in their Mexican derivative aluminum articles to ensure accurate classification and compliance with these temporary import restrictions.