Analysis
HTS 3902.20.10 covers polyisobutylene: elastomeric under heading 3902 (polymers of propylene or of other olefins, in primary forms).
This line's footnotes point to one additional provision in Chapter 99: 9903.90.08 (measures on products of Russia). Chapter 99 duties are added on top of the general rate for goods of the countries they name, and they change more often than the rest of the schedule, so check the current CBP guidance before you rely on a total.
Within this group the rate runs from 6.5% to 6.5%. Compared with 3902.90.00 (polymers of propylene or of other olefins, in primary forms: other), which pays 6.5%, a misclassification either way moves the duty by 6.5 percentage points.
The normal trade relations rate here is zero, shared by about 13% of the 236 tariff lines in chapter 39, a useful check when a neighbouring dutiable line is a candidate. Chapter 99 measures such as Section 301 or 232 can still apply on top, depending on where the goods come from.
The other lines in the same group are 3902.10.00 (polymers of propylene or of other olefins, in primary…, 6.5%), 3902.20.50 (polyisobutylene: other, 6.5%), 3902.30.00 (propylene copolymers, 6.5%) and 3902.90.00 (polymers of propylene or of other olefins, in primary…, 6.5%).
Neighbouring lines
| Line | Description | General rate |
|---|---|---|
| 3902.10.00 | Polymers of propylene or of other olefins, in primary forms: polypropylene | 6.5% |
| 3902.20.50 | Polyisobutylene: other | 6.5% |
| 3902.30.00 | Propylene copolymers | 6.5% |
| 3902.90.00 | Polymers of propylene or of other olefins, in primary forms: other | 6.5% |
Chapter 99 provisions in the footnotes
- 9903.90.08 measures on products of Russia
Articles the product of the Russian Federation, as provided for in U.S. note 30(a) to this subchapter and as provided for in the subheadings enumerated in U.S. note 30(b) to this subchapter