Analysis
Heading 2509 of the Harmonized Tariff Schedule covers chalk. It has 2 tariff lines.
Every one of its 2 tariff lines is duty-free at the general rate, so classification within the heading affects statistics and Chapter 99 measures rather than the base duty.
Its lines are 2509.00.10 for chalk: crude (duty-free) and 2509.00.20 for chalk: other (duty-free).
By Census's concordance, most of its statistical lines are made by Crushed and Broken Limestone Mining and Quarrying (212312). Those are the NAICS industries a US producer of these goods would report under.
Its median rate of duty-free sits at the 46th percentile of the headings in chapter 25.
The heading text decides whether a product belongs here at all (General Rule of Interpretation 1); the subheadings and lines below it only apply once that is settled. Section and chapter notes can override the heading wording, so read them for borderline goods.
Tariff lines
| Line | Description | General rate |
|---|---|---|
| 2509.00.10 | Chalk: crude | Free |
| 2509.00.20 | Chalk: other | Free |