[3-LEG] Tariff and customs measure chain, one trade measure (?entity=sec301-china-list1): leading review pipeline stage -> current current legal force -> realized lifecycle from imposed to expired or rescinded (confirmation gate). A chain, not one reading: confidence = how many legs are lit, in order. Sources: USTR, Federal Register, USITC. Descriptive only, never a forecast or advice. No data -> 422 no_charge, not billed. $0.25 per call.

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