Analysis
Subheading 8540.99 covers other, within heading 8540. The first six digits are shared by every country that uses the Harmonized System, so this part of the code is the same in the US, UK and EU schedules; the 2 US tariff lines below it are national.
Every one of its 2 tariff lines is duty-free at the general rate, so classification within the subheading affects statistics and Chapter 99 measures rather than the base duty.
The US splits it as follows: 8540.99.40 for electron guns; radio frequency (RF) interaction structures for… (duty-free) and 8540.99.80 for other: other (duty-free).
By Census's concordance, most of its statistical lines are made by Other Electronic Component Manufacturing (334419). Those are the NAICS industries a US producer of these goods would report under.
Goods only reach 8540.99 once they fall within heading 8540 (thermionic, cold cathode or photocathode tubes (for example, vacuum or vapor or gas…). Under General Rule 6, subheadings are then compared only with others at the same level, so a product is matched against its siblings, not against lines elsewhere in the chapter.
Tariff lines
| Line | Description | General rate |
|---|---|---|
| 8540.99.40 | Electron guns; radio frequency (RF) interaction structures for microwave tubes of subheadings 8540.71 through 8540.79, inclusive | Free |
| 8540.99.80 | Other: other | Free |