4412.91.31.30 - With a face ply of sen (Kalopanax spp.)

This HTS classification, 4412.91.31.30, pertains to plywood where the face ply is specifically composed of wood from the Sen tree, scientifically identified as *Kalopanax spp.* This category falls under "Other" plywood that is not surface covered or is covered with a transparent material that allows the grain of the face ply to be visible. The critical defining characteristic for this classification is the genus of the primary face veneer.

This classification is distinct from its sibling categories, which are differentiated by the specific species of wood used for the face ply. For instance, 4412.91.31.10 covers plywood with a face ply of Spanish cedar (*Cedrela spp.*), while 4412.91.31.20 applies to plywood with a walnut (*Juglans spp.*) face ply. Similarly, 4412.91.31.40 is reserved for mahogany (*Swietenia spp. or Khaya spp.*) face plies. Therefore, the presence of *Kalopanax spp.* as the outer veneer is the sole determinant for classification under 4412.91.31.30.

As this classification represents a leaf node within the HTS structure, there are no further subcategories. The scope is precisely defined by the material of the face ply. Classification decisions within this level therefore depend strictly on the identification of the wood species forming the outermost visible layer of the plywood.