9902.13.14 - Acrylic staple fibers (polyacrylonitrile staple) containing 85 percent or more by weight of acrylonitrile units and 2 percent or more but not over 3 percent of water, colored, crimped, with a decitex between 1.98 and 2.42 and fiber length between 40 and 47.5 mm, certified by the importer as having a solar reflectance index between 10 and 30 (provided for in subheading 5503.30.00)

This HTS code, 9902.13.14, specifically covers certain acrylic staple fibers that meet stringent technical specifications. These fibers are characterized by their composition, containing 85 percent or more by weight of acrylonitrile units. Further, they must fall within a specific range for water content (2-3%), be pre-colored and crimped, and possess a decitex between 1.98 and 2.42. Crucially, the fiber length must be between 40 and 47.5 mm, and the importer must certify a solar reflectance index between 10 and 30. This classification falls under temporary legislation and is a specific modification to the standard classification found in subheading 5503.30.00.

Unlike the more general classifications of live animals found in other Chapter 99 subheadings, such as live horses or bovine animals, this category pertains to synthetic textile materials. The siblings at this level within Chapter 99 would likely also represent temporary modifications or special provisions, but their subject matter would differ significantly, focusing on other goods subject to temporary import rules or restrictions rather than specific textile properties.

As this node is a leaf node, there are no further subcategories. The detailed specifications provided in the description are the definitive criteria for classification. Any acrylic staple fiber that does not precisely meet all the listed parameters, including the certified solar reflectance index, would not be classified under this specific subheading and would need to be evaluated under the appropriate primary HTS classification.