Bleached 3- or 4-Thread Twill Cotton Fabric, Not Over 200 g/m²

A plain weave interlaces each weft thread over and under successive warp threads in a 1×1 pattern, while a 3- or 4-thread twill shifts the interlacing point by one thread on each successive row, creating a diagonal line. Customs classifiers and fabric analysts typically verify the weave structure by examining the repeat pattern under magnification; the diagonal rib is the key physical indicator separating HTS 520823 from the plain-weave headings 520821 and 520822.

No. The heading explicitly includes cross twill alongside standard 3- and 4-thread twill constructions, so both are classified under 5208230000 without distinction. Cross twill — where the diagonal direction reverses to create a herringbone-like effect — does not create a separate tariff line within this subheading.