Textiles classification rules prioritize predominant material, specify yarn and 'made up' criteria, and list comprehensive exclusions.

Section XI prescribes classification rules for textiles (Chapters 50-63): an exclusion list delimiting covered goods; a predominant material rule treating mixed-material goods as wholly of the weight predominant textile or, if equal, the material with the later heading number; binding provisions treating composite yarns and metal thread as single materials and treating Chapters 54 and 55 together; detailed technical definitions and thresholds for yarn categories, "put up for retail sale", "sewing thread" and "high tenacity yarn"; a statutory definition of "made up" goods and cross-Chapter application rules; and sub heading definitions and standards references for consistent classification.

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