9902.13.06 - Acrylic staple fibers (polyacrylonitrile staple) containing at least 85 percent by weight of acrylonitrile units and 2 percent or more but not over 3 percent of water, colored, crimped, with an average decitex of 3.0 (plus or minus 10 percent) and fiber length of 50 mm (plus or minus 10 percent) (provided for in subheading 5503.30.00)

This HTS classification, 9902.13.06, pertains to a very specific type of acrylic staple fiber. These fibers are characterized by their composition: they must contain at least 85% acrylonitrile units by weight. Furthermore, they are distinguished by a precise water content, falling between 2% and 3% by weight. Additional defining features include being colored, crimped, and having specific physical dimensions. The average decitex (a measure of linear density) must be 3.0, with a permissible variance of 10%, and the average fiber length is 50 mm, also with a 10% tolerance. This particular classification is made possible by a temporary modification or special provision and is ultimately linked to the more general classification of synthetic staple fibers found under subheading 5503.30.00.

Given that this is a leaf node within the HTS database, there are no further subcategories to explore under 9902.13.06. Its distinctness from sibling categories at the HTS Root level is evident. While sibling categories at the Root might cover a vast array of goods, such as live animals (Chapters 01), live plants (Chapter 06), or mineral products (Chapter 25), this specific entry is located within the temporary and special classification provisions (Chapter 99). These Chapter 99 provisions often address temporary import restrictions, quotas, or tariff treatments, differing significantly from the permanent tariff classifications of raw materials or finished goods found in earlier chapters. Therefore, the core function of this classification is to manage specific imports under special trade rules, rather than to categorize a standard trade commodity.