<h1>Section XI textile tariff classification: exclusions, mixed-material weight rules, yarn and 'made up' definitions, essential-character guidance</h1> Section XI prescribes the scope and tariff-classification rules for textiles and textile articles (Chapters 50-63) by excluding specified non-textile and specially treated goods (including certain plastics/rubber-coated textiles, footwear, furniture, toys, and other enumerated articles) from the Section, thereby directing their classification to other chapters. It mandates predominance-by-weight and last-in-numerical-order tie-break rules for mixtures of textile materials, with special aggregation and chapter-grouping rules (including treating Chapters 54-55 as one chapter in mixed cases), and extends these rules to certain yarns. It defines when yarn is treated as twine/cordage, 'put up for retail sale,' 'sewing thread,' 'high tenacity,' and when articles are 'made up,' and provides subheading definitions for yarn/fabric states and construction; it also classifies functional-component textiles within Section XI if essential character is retained, with BIS/ASTM references taken as the latest published versions.