Aperture Research Works
Global Trade, Tariffs & Customs Intelligence / Sources
Evidence-based decision support

Original evidence comes before conclusions

Which official trade provision might affect this product and route?

Commission verification

Priority source classes

  • USITC HTS schedule
  • official customs notice
  • original export restriction
Named sourceUse caseLimitations
US International Trade Commission 2026 HTS archiveUSITC HTS scheduleConfirm identity, recency, original status and completeness before reliance.
US Treasury OFAC sanctions searchofficial customs noticeConfirm identity, recency, original status and completeness before reliance.
U.S. Bureau of Industry and Security rulesoriginal export restrictionConfirm identity, recency, original status and completeness before reliance.

Verification and negative evidence

  • Confirm publication timestamp versus underlying record effective date.
  • Do not infer no adverse record from an unsuccessful search; document search spelling and access.
  • Use independent original records when a single platform aggregates primary material.
  • Store source URL, date read, exact excerpt, jurisdiction and access constraints.
  • Test at least one plausible contradictory hypothesis.
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