# How to Read a Federal Register Tariff Notice

Source: https://dutywatchhq.com/blog/2026-11-08-read-federal-register-tariff-notice.html

Cross-border operations guide · November 8, 2026


**Short answer:** A Federal Register tariff notice has four dates that matter: publication, effective, comment close, and the in-transit cutoff for goods already shipped. The effective date is the one that sets the duty, and under 19 USC 3006 an HTS modification cannot take effect before the 30th day after publication, following a 60-day layover before Congress.

## Four dates, and they are not the same date

Every tariff notice carries more than one date, and the expensive mistake is reading the wrong one. The publication date is when the notice appears in the Federal Register. The effective date is when the new rate applies. The comment period, usually thirty to sixty days, is the window to file a comment through regulations.gov with the docket number. And the in-transit date is the cutoff for goods already on the water when the notice lands.

The effective date is the one that sets the duty, and it is the one people misread most. A notice published on the first of the month does not necessarily take effect on the first of the month, and goods that arrive the day before the effective date pay the old rate while goods that arrive the day after pay the new one. The entry date, not the ship date, is what counts, except where an in-transit rule says otherwise.

## The 30-day rule and the 60-day layover

The timing is not arbitrary. Under 19 USC 3006, a modification to the Harmonized Tariff Schedule cannot take effect before the 30th day after the notice is published in the Federal Register, and only after a 60-day layover period before Congress. The notice has to sit in front of Congress for sixty days, and then wait thirty more days after publication, before the rate can change.

That is why the gap between a tariff announcement and its effective date is measured in months, not days. An importer who hears the announcement and starts repricing immediately is early. An importer who waits for the effective date and then discovers the rate changed while their goods were on the water is late. The notice gives you the dates. Read them all, and put them on the calendar the day the notice publishes.

## What the notice actually says about your product

The notice will name the HTS subheadings it covers, and that is where the reading gets specific. A tariff on steel does not cover every product with steel in it. It covers the subheadings listed in the annex, and the annex is the document, not the headline. The headline says copper. The annex says which copper articles, by subheading, and at what rate.

Check the annexes first and the summary last. The summary is written for the press. The annex is written for the entry filer. If your subheading is not in the annex, the tariff does not apply to your product, whatever the headline says. If it is in the annex, the rate in the annex is the rate, and the effective date next to it is the date.

## Comments, dockets, and the in-transit question

The comment period is the one real chance to change the outcome. Comments are filed through regulations.gov, with the docket number from the notice, and they have to be filed before the period closes, usually thirty to sixty days after publication. A comment that says the tariff hurts your business is noise. A comment that shows the product has no domestic substitute, with numbers, is evidence, and the agencies read evidence.

The in-transit question is the last one, and it is the one that saves money. Some notices exempt goods that were already in transit on the publication date, or on the announcement date, and the exemption turns on the bill of lading date, not the arrival date. If your goods were on the water when the notice published, check the in-transit language before you pay the new rate. The exemption is often there, and it is often missed.

Keep reading: [Section 232 Steel Tariffs: What Counts as Steel Content](https://dutywatchhq.com/blog/2026-11-06-section-232-steel-content.md), [Antidumping Duties: How Commerce Sets the Rate](https://dutywatchhq.com/blog/2026-11-06-antidumping-duties-rate-setting.md), [How do importers prepare for a de minimis rule change before it lands?](https://dutywatchhq.com/blog/2026-10-18-prepare-de-minimis-rule-change.md).

## Frequently asked questions

## What is the difference between the publication date and the effective date?

The publication date is when the notice appears in the Federal Register. The effective date is when the new rate applies, and it is later. Under 19 USC 3006, an HTS modification cannot take effect before the 30th day after publication, after a 60-day layover before Congress. Goods entered before the effective date pay the old rate.

## How long is the comment period on a tariff notice?

Usually thirty to sixty days from publication. Comments are filed through regulations.gov using the docket number from the notice. A comment that shows a product has no domestic substitute, with numbers, carries more weight than a general complaint about the cost.

## Where do I find which products a tariff covers?

In the annexes, not the headline. The notice lists the HTS subheadings it covers, and only products in those subheadings are affected. A tariff on copper does not cover every product with copper in it, only the subheadings named in the annex.

## What is an in-transit exemption?

Some notices exempt goods that were already in transit when the notice published, or when the tariff was announced. The exemption turns on the bill of lading date, not the arrival date. If your goods were on the water on the publication date, check the in-transit language before paying the new rate.