9902.13.24 - Artificial staple fibers of viscose rayon, not carded, combed or otherwise processed for spinning and containing 28 percent or more but not over 33 percent by weight of silica (provided for in subheading 5504.10.00); the foregoing other than fibers measuring 2.2 decitex in lengths of 38 mm, measuring 4.7 decitex in lengths of 51 mm or measuring 3.3, 4.7 or 5.0 decitex in lengths of 60 mm

This HTS category, 9902.13.24, specifically addresses artificial staple fibers made from viscose rayon. These fibers are characterized by their unsuitability for immediate spinning, meaning they have not undergone processes such as carding or combing. A key defining feature is their silica content, which must be between 28% and 33% by weight. This classification is further refined by excluding specific fiber types: those measuring 2.2 decitex in 38 mm lengths, 4.7 decitex in 51 mm lengths, and 3.3, 4.7, or 5.0 decitex in 60 mm lengths. These exclusions ensure precise identification within this specialized group of man-made fibers.

While the broader HTS system contains numerous entries for various materials and products, including other types of artificial staple fibers under Chapter 55, this specific Chapter 99 classification points to temporary legislation or modifications related to trade agreements. Unlike standard tariff classifications that might broadly cover all viscose rayon staple fibers, this code signifies a specific, potentially time-limited or conditionally applied, duty or restriction regime. It is crucial to note that this category does not have further subcategories, indicating it represents a distinct and narrowly defined group of goods subject to these particular provisions.