Tariff SentinelCheck code
Source hierarchy and review notes

How Tariff Sentinel turns official sources into code-level alerts.

The product starts from official sources, keeps source links visible, and marks uncertain scope so users know what needs broker or compliance review before filing.

Source: Tariff Sentinel source registryRefreshed Jun 3, 2026Official source Spotted an error?

Source hierarchy

  1. Current official HTS and govinfo/Federal Register legal text.
  2. USTR, CBP, and Commerce official guidance pages.
  3. CBP rulings for classification examples only.
  4. Third-party commentary for competitor research only, never source-of-truth claims.

Source registry

USITC HTS

HTS code descriptions, duty columns, notes, revision metadata

Source

Federal Register API

Tariff-related notices and metadata

Source

govinfo

Official Federal Register PDFs

Source

USTR

Section 301 actions and exclusions

Source

CBP Trade Remedies

Implementation guidance and trade remedies

Source

CBP CROSS

Classification examples only

Source

What happens when sources disagree

When two sources appear to point in different directions, Tariff Sentinel keeps the higher-authority source closest to the claim and downgrades the result to a review note. Federal Register legal text, current HTS language, and official agency guidance take priority over summaries, older pages, or third-party commentary.

The system is intentionally conservative: broad notices, stale references, or product-specific language are shown with caveats instead of being converted into a confident duty answer. That makes the page useful for triage while keeping the final filing decision with the importer, broker, or trade counsel.