Product specific rules of origin set tariff-shift and value-content criteria across goods, with special process-based origin rules. Product specific rules of origin are prescribed by chapter, heading and sub-heading, using defined tariff-classification terms, the prefix ex, section notes, tariff-shift criteria, value-content thresholds, and alternative or cumulative requirements. The Annexure defines origin concepts such as WO, CC, CTH, CTSH, QVC, Standard QVC, build-down and build-up methods, ex-works price, free-on-board value, and Melt and Pour. It also includes special rules for chemical reaction, mixing and blending, and product-specific criteria across agricultural, chemical, metal, machinery, textile, transport, and other goods.