GRI 1 — Terms of the Headings
GRI 1 states that classification shall be determined according to the terms of the headings and any relative section or chapter notes. It is the primary rule in the classification framework and, by a substantial margin, resolves more HTSUS classifications than all other GRI rules combined.
In Detail
"Terms of the headings" means the actual legal text of the HTSUS headings — the 4-digit descriptions that define the scope of each heading's coverage (e.g., "8481 — Taps, cocks, valves and similar appliances..."). "Any relative section or chapter notes" means all notes applicable to the section and chapter containing the heading under consideration. The notes are not secondary to the headings — under GRI 1, they carry the same legal weight and must be consulted first.
The correct application of GRI 1 follows a mandatory sequence: section notes are evaluated first, then chapter notes, then heading text. A section note that excludes a product from the section is dispositive — no heading in that section can classify the product. A chapter note that defines a term controls over a common-language reading of that term in a heading. Only after notes are cleared can heading text be applied to determine whether the product fits.
GRI 1 is determinative when a single heading, read in light of all applicable notes, unambiguously describes the product. When two headings appear to equally describe the product, or when no heading clearly fits, subsequent GRI rules are invoked. But the rule is clear that GRI 2 and beyond can only be reached after GRI 1 genuinely fails — not simply because classification is uncertain or complex.
Classification Significance
Most classification disputes at audit or protest resolve around GRI 1 analysis: whether the correct notes were consulted, whether a note exclusion was missed, whether the heading text was read too broadly or too narrowly. A product classified under a later GRI rule without a documented reason why GRI 1 failed is vulnerable to CBP challenge. GRI 1 compliance is the foundation of any defensible classification program.
How Kanon Handles This
Kanon evaluates GRI 1 for every product by processing all applicable section and chapter notes through its structured condition-tree corpus before comparing heading text. Every note evaluated, every condition checked, and the reasoning that either resolves or fails to resolve classification at GRI 1 is documented in the Classification Support Package.