6106.90.30.10 - Subject to cotton restraints (339)

This HTS classification covers women's or girls' blouses and shirts that are knitted or crocheted, and are made from textile materials other than those specifically enumerated in the preceding subheadings. The crucial distinguishing factor for this particular category, 6106.90.30.10, is that the garments classified herein are subject to specific cotton restraints, as indicated by the (339) designation.

This differentiates it from its sibling categories which are also for women's or girls' blouses and shirts of other textile materials but are subject to different restraint regimes: 6106.90.30.20 for wool restraints (438), 6106.90.30.30 for man-made fiber restraints (639), and 6106.90.30.40 for all other goods not falling under specific restraint categories. Therefore, the material content, specifically cotton, combined with the presence of cotton restraints, is the primary determinant for classification under this heading.

As this is a leaf node, there are no further subdivisions. Classification under 6106.90.30.10 is final and depends solely on the garment meeting the criteria of being a knitted or crocheted blouse or shirt for women or girls, made of textile materials not specified elsewhere at the 6-digit level, and being subject to the denoted cotton restraints. Practical classification would involve verifying the fiber content to confirm it is predominantly cotton and checking the relevant trade agreements or customs regulations for the applicable cotton restraint.