Harmonized System Chief Weight Tariff Reclassification Driven by Moisture Regain Adjustments
Adjusting dry test mass using official moisture regain values shifts binary fiber ratios, changing chief weight tariffs and altering landed customs duties.
HS Chapter 51
Animal Material
Systematic nomenclature governing the international trade of wool, fine or coarse animal hair, and horsehair yarn or woven fabric establishes standardized customs coding across trading nations. Customs declarations under HS Chapter 51 cover uncarded raw fleece through to fully finished woven suiting fabrics containing animal hair. The chapter sets specific weight thresholds and processing categories for raw wool, carded slivers and combed tops.
Coverage stops when animal hair items are incorporated into finished garments or made-up textile articles classified under later downstream chapters.
Processing Hierarchy
Processing stages dictate moving from raw commodity headings to processed yarn and fabric entries. Under HS Chapter 51, carded wool yarn occupies a distinct sub-heading from combed worsted yarn due to structural differences in fibre alignment. Customs duties vary based on whether the animal hair has undergone scoured cleaning or mechanical carding.
Fibre Distinction
Microscopic fibre identification distinguishes sheep wool from fine animal hair like cashmere or mohair. Correct categorization within HS Chapter 51 requires verified mean fibre diameter measurements, as fine animal hair carries different tariff concessions than coarse hair. Laboratory certificates accompany shipments to substantiate origin and fineness claims.
Tariff Boundary
Blends containing synthetic filaments alongside wool follow strict composition thresholds for chapter assignment. Blended goods remain in HS Chapter 51 only if animal fibres equal or exceed predominant weight thresholds against non-animal materials. Exceeding those limits reclassifies the shipment into man-made fibre chapters.