The Section 122 Tariff Clock: How Importers Should Read the 150-Day Limit

The direct answer

A Section 122 import surcharge has a statutory clock: it may remain in effect for no more than 150 days unless Congress extends it by law. The authority also caps the temporary surcharge at 15%.

That does not mean an importer should remove the duty from a landed-cost model simply because day 150 is approaching—or because a court ruling appears in the news. The legal deadline, current customs collection, the scope of judicial relief, and possible action under other tariff authorities are separate questions.

A typical friction point comes when a shipment is scheduled near the expected endpoint. Procurement may want to reprice the order immediately, while the customs team is still waiting for implementation instructions. The safer analytical move is to identify which event has actually occurred before changing the cost assumption.

What does the 150-day limit actually control?

19 U.S. Code § 2132 authorizes temporary import measures intended to address serious U.S. balance-of-payments problems. It allows an import surcharge of up to 15% and provides that a measure exceeding 150 days requires an extension by an act of Congress.

The clock therefore answers a narrow but consequential question: how long the executive branch may maintain that Section 122 measure without congressional extension.

It does not, by itself, answer how Customs and Border Protection (CBP) will process a particular entry, whether a court order protects a particular importer, or whether another tariff authority may later affect the same product.

Which event are you looking at?

Event or signal	What it can establish	What it does not establish by itself
The 150-day endpoint	The statutory limit has been reached absent congressional extension	That CBP has already changed collection instructions for every entry
An act of Congress	The measure has been extended under the statutory framework	The exact operational treatment of every shipment without implementing details
A trial-court ruling	Relief or a legal conclusion within the order’s stated scope	Universal relief for all importers or a final outcome after further proceedings
A stay or appellate order	Whether a lower-court ruling takes effect while review continues	The final resolution of every legal issue
CBP instructions	How the measure is being administered for customs entries	Whether a separate tariff authority will be used later
A USTR or Commerce proceeding	Another trade-action pathway is under consideration	That a new tariff is certain or already effective

This separation is the article’s main decision rule. “The statute expires,” “the court ruled,” and “customs stopped collecting” are not interchangeable statements.

What did the recent court ruling change?

The supplied Associated Press report describes a U.S. Court of International Trade ruling against the new global tariffs at issue in that case. It also reports uncertainty involving the ruling’s reach, further proceedings, and possible follow-on tariff actions.

For an importer, the headline is not enough. The practical questions are narrower:

• Is the company or its entry covered by the order?
• Does the order apply only to the named plaintiffs?
• When does the relief take effect?
• Has the order been stayed?
• Are further proceedings underway?
• Has CBP changed its collection instructions?

The easy mistake is to treat a legal defeat for the government as an immediate systemwide refund or collection stop. That conclusion requires support from the actual order and its implementation, not just the existence of a ruling.

Who is most exposed to timing mistakes?

The 150-day boundary matters most when commercial decisions depend on a narrow entry window. Exposure may be higher for:

• Importers with shipments expected near the statutory endpoint.
• Companies quoting delivered prices that include the surcharge.
• Buyers and suppliers whose contracts do not clearly allocate tariff changes.
• Customs teams managing deposits that could later require reconciliation.
• Businesses assuming that one court plaintiff’s relief applies to unrelated entries.
• Procurement teams treating the end of Section 122 as the end of all tariff exposure.

The operational risk is not limited to paying too much. Removing a tariff assumption prematurely can also create an understated purchase cost, a customer-pricing gap, or an internal dispute over who accepted the change risk.

A working checklist for importers

1. Build the statutory timeline

Record the proclamation or measure’s effective date and calculate the 150-day endpoint. Keep any congressional extension in a separate field and distinguish a proposed bill from an enacted law.

2. Confirm current collection treatment

Check CBP notices, instructions, and customs-system treatment. A legal event may occur before operational guidance reaches every workflow, so record both the legal date and the implementation date when they differ.

3. Read the operative court language

Identify the parties, covered products or entries, effective date, remedy, and any stay. If the business is not clearly within the order’s scope, do not assume the relief transfers automatically.

4. Separate other tariff authorities

Track Section 301 activity through the Office of the U.S. Trade Representative and Section 232 activity through the Department of Commerce as distinct processes. The expiration of Section 122 does not prove that another measure will follow, but it also does not prevent a separate process from affecting future costs.

5. Preserve the evidence behind each entry decision

Keep the applicable CBP instruction, entry date, classification, duty calculation, court document relied upon, and relevant contract language together. If treatment changes later, this record will be more useful than a spreadsheet containing only the final duty rate.

What should teams monitor next?

Watch for four categories of evidence, in order:

1. Congressional action: Has an extension actually become law?
2. Court status: What does the operative order cover, and is it stayed or under further review?
3. CBP implementation: Are duties still being collected, and for which entries?
4. Separate trade proceedings: Have USTR or Commerce initiated or advanced another process that could affect the same products?

None of these signals should be used as a forecast in isolation. Together, they show whether the risk is statutory, operational, litigation-specific, or tied to a different trade authority.

The decision checkpoint

Before changing a purchase order, customer quote, customs deposit, or accrual, write down one sentence describing the evidence: “The statutory period ended,” “Congress extended the measure,” “this court order covers our entry,” or “CBP changed collection treatment.”

If the sentence cannot yet be completed with a specific document and scope, the tariff status remains an open operational question rather than a confirmed cost change.