Section 301 Tariff Exclusions: The Heading Inventory and How to Claim One

Most explanations of Section 301 exclusions talk about products and dates. The mechanic that decides whether your entry is clean is simpler: the exclusion exists only if the tariff schedule names a heading for it. This page parses that naming out of the Chapter 99 text itself — the “except as provided in headings…” clause at the front of each action heading — and pairs it with the notice trail that grants and amends exclusions. Every value below is recomputed from our Chapter 99 corpus and our Section 301 line enumeration at build time.

How the tariff schedule writes an exclusion

The action headings do not list products; they point. Heading 9903.88.01 opens with “Except as provided in headings 9903.88.05, 9903.88.06, …” and then covers the general universe of China-origin goods in its list. Each heading it excepts is an exclusion heading: it carries the inverse instruction, that articles covered by a USTR grant go there instead and do not pay the additional duty. That structure is why an exclusion is claimed with two codes on one entry line — the ordinary HTS classification for the product, and the Chapter 99 exclusion subheading that tells CBP not to apply the action.

Because the carve-out lives in the parent heading's text, an exclusion can disappear in two ways: the grant behind it expires, or the parent heading is rewritten and stops excepting it. Both produce the same result at the border — the additional duty is back — even though only one of them is visible in a news story about the exclusion expiring.

The current inventory: 25 exclusion headings

Parsed from the Chapter 99 text corpus: 17 headings are excepted by 9903.88.01 and 12 by 9903.88.02; 4 appear in both clauses, giving 25 distinct subheadings across 62 rows in the 9903.88.05+ block.

Source: USITC Chapter 99 release text, parsed into data/ch99-rows-20261029.json — https://hts.usitc.gov/reststop/file?release=currentRelease&filename=Chapter%2099 (fetched 2026-10-29).

The “in both parents” column is the one that surprises people. A heading can be excepted by more than one action heading, which means the same grant removes more than one rate tier at once — and if you claim the wrong parent pairing, the entry shows a partial relief rather than none. The U.S. note column is the subchapter note that carries the actual product list; that note, not the heading text, is where a scope question is settled.

Rate tiers the exclusions are carved out of

An exclusion removes the additional duty of the tier it sits under, so the tier matters as much as the grant. Our Section 301 enumeration covers 11,070 line-level entries across 10,445 distinct eight-digit codes — 10,391 under China actions and 679 under the Russian Section 232 action, which we keep in the same corpus because the stacking arithmetic is identical.

Line counts per Chapter 99 action heading, recomputed from data/section301_origin.json.

Source: USITC Chapter 99 export, parsed into data/section301_origin.json — https://hts.usitc.gov/reststop/file?release=currentRelease&filename=Chapter%2099 (fetched 2026-10-16).

Two tiers dominate: 9903.88.03 at 25% over 5,906 lines and 9903.88.15 at 7.5% over 2,958 lines. An exclusion written against the 25% tier is worth roughly three times one written against the 7.5% tier, which is why grant announcements are usually read alongside the heading they apply to rather than on their own.

The notice trail: where a grant comes from

A heading appearing in the schedule is the end of a process that starts with a Federal Register notice. Our Section 301 notice trail holds 31 notices published between 2025-01-23 and 2026-10-07, of which 5 are exclusion amendments and 1 is a continuation. The amendments are the ones that change what a heading covers.

Exclusion amendments and continuations in the Section 301 notice trail.

Source: Federal Register Section 301 notice trail, data/trade-relief.jsonl — https://www.federalregister.gov/api/v1/documents.json (fetched 2026-10-18).

How to claim an exclusion on an entry

Four things have to line up, and a broker will ask for all four before the entry is filed. The product must fall inside the note that the exclusion heading points to — not merely resemble a product the grant mentions. The classification must be the HTS code the grant covers, because an exclusion tied to one eight-digit line does not follow the goods into a neighbouring line. The Chapter 99 pairing must be the exclusion subheading plus its parent action heading, in the order the schedule expects. And the timing must be inside the grant's window: exclusions are granted for a period, and an entry before or after that period pays the additional duty even with perfect paperwork.

What goes wrong most often is scope drift, not arithmetic. An importer reads that a product category was excluded, classifies their item into the same eight-digit line as the excluded product, and claims the relief — but the note excludes a described subset, and CBP later finds the item outside it. The defence is a written scope memo at classification time, kept with the entry file, that quotes the note and states why the item is inside it. The second most common failure is an expired window: the grant was real, the paperwork was right, the entry date was two weeks late.

To check whether an action reaches your line at all, classify first with the HS code search, then stack the rates in the duty calculator. Our line-exposure analysis of the same corpus is in the line exposure map, the rate-tier census is in the tier census, and the exclusion expiry calendar — which exclusions lapse on which date — is maintained separately in the expiry map. If the goods are not China-origin, none of this applies and the MFN rate from the HTS is the answer.

What an exclusion does not do

It does not remove the MFN duty: a 5.3% base rate stays 5.3% whether or not the additional action is excluded. It does not apply retroactively unless the notice says so and CBP has issued the liquidation instructions that make the refund route real. It does not transfer with the goods — the claim belongs to the importer of record, so a reseller cannot pass it down the chain. And it does not survive the expiry of the grant, even if the schedule text still shows the heading while the office works through a wind-down.