Analysis
HTS 2529.22.00 covers containing by weight more than 97 percent of calcium fluoride under heading 2529 (feldspar; leucite, nepheline and nepheline syenite; fluorspar).
The normal trade relations rate here is zero, shared by about 91% of the 78 tariff lines in chapter 25, a useful check when a neighbouring dutiable line is a candidate. Free here means free of the base duty only: origin-specific Chapter 99 duties such as Section 301 can still be owed.
The other lines in the same group are 2529.10.00 (feldspar; leucite, nepheline and nepheline syenite…, duty-free), 2529.21.00 (containing by weight 97 percent or less of calcium fluoride, duty-free) and 2529.30.00 (leucite; nepheline and nepheline syenite, duty-free).
Census statistics map these goods to NAICS 21239 (Other Nonmetallic Mineral Mining and Quarrying), an industry of 236 US establishments employing 10,238 people. That concordance is how imports of this line are compared with US output.
All 3 neighbouring lines carry the same duty-free rate, so a borderline choice between them changes the statistics reported, not the duty paid.
Neighbouring lines
| Line | Description | General rate |
|---|---|---|
| 2529.10.00 | Feldspar; leucite, nepheline and nepheline syenite; fluorspar: feldspar | Free |
| 2529.21.00 | Containing by weight 97 percent or less of calcium fluoride | Free |
| 2529.30.00 | Leucite; nepheline and nepheline syenite | Free |