Section 338 Canada T-Minus 12: FTZ Privileged Foreign Election Deadline and In-Transit Rule Absence

Section 338 tariffs on covered Canadian-origin imports take effect August 19 2026 at 12:01 AM EDT under Presidential Proclamations 11061, 11062, and 11063 signed July 20 2026. Today is T-12.

The three proclamations impose an additional 50 percent ad valorem duty on approximately 20 billion dollars annually of Canadian imports across three headline sectors (motor vehicles, alcoholic beverages, dairy) plus an expanded annex covering wine, hockey sticks, cement, plywood, furniture, fishing rods, seeds, clothing, wigs, and swimming pools. USMCA does not waive Section 338. The proclamations do not include an in-transit exception. This is a hard cliff.

For importers holding Canadian-origin covered goods in transit, in bonded warehouse, or at a US Foreign Trade Zone, the T-12 to T-0 window is the last chance to lock the pre-S338 duty status. The primary planning lever is the FTZ Privileged Foreign election under 19 USC 81c(a). Everything else has closed or is closing.

The FTZ Privileged Foreign mechanic

19 USC 81c(a) permits Foreign Trade Zone operators and users to elect Privileged Foreign (PF) status for foreign-origin merchandise admitted to a US FTZ. The election is filed on CBP Form 214 (Application for Foreign-Trade Zone Admission and/or Status Designation) at the time of admission.

The effect of the PF election is to lock the tariff classification, quantity, and dutiable value of the merchandise at the date of admission. When the goods are later withdrawn from the FTZ for consumption entry into the US customs territory, they are dutiable at the rate in effect on the date of PF election, not the date of withdrawal.

For Section 338 Canada, this means:

Canadian-origin covered goods admitted to a US FTZ before August 19 2026 12:01 AM EDT under Privileged Foreign status can be held in the FTZ indefinitely and withdrawn later at the pre-S338 duty rate (typically MFN base plus applicable Chapter 99 layers, but not the 50 percent S338 surcharge).

Canadian-origin covered goods admitted to a US FTZ after August 19 without PF status will be dutiable at the post-S338 rate on withdrawal. The withdrawal date, not the admission date, controls the applicable rate for non-PF status merchandise.

The PF election is generally irrevocable once accepted. Once you elect PF status, you cannot later re-elect Non-Privileged Foreign to take advantage of a lower rate that emerges. This matters if there is any expectation that S338 might be litigated and struck down between admission and withdrawal.

The in-transit rule absence

Section 122 (February 2026 through July 24 2026) included an in-transit exception at HTS 9903.03.02, which exempted goods loaded on a vessel or aircraft and in transit to a US port before the February 24 2026 effective date.

The three July 20 2026 Section 338 proclamations contain no in-transit exception. There is no equivalent to HTS 9903.03.02 for Section 338.

The practical consequence is that liquidation snaps to date of entry as controlled by 19 CFR 141.68. The date of entry is the date the entry documentation is filed with CBP in proper form and the merchandise has arrived within the port limits, whichever is later. A container that left Montreal August 15, arrived at the US port August 20 at 06:00, and had the entry summary accepted at 09:00 on August 20 is dutiable at the full Section 338 rate. The August 15 departure date is irrelevant.

For importers with Canadian goods currently in transit that will arrive after August 19, the exposure is realized on entry. Options to mitigate are limited:

Divert the shipment to a US FTZ and admit under Privileged Foreign status before August 19, if the shipment can physically arrive and clear FTZ admission before the cutoff. This is only feasible for shipments already in a US port before the deadline.

Warehouse the goods in a bonded warehouse (19 USC 1555) after entry, then re-export to Canada or a third country before consumption entry. Duty deposits are refunded on re-export under 19 USC 1557. This is only economically sensible for high-value goods where the S338 exposure exceeds the round-trip logistics cost.

Accept the S338 exposure and re-price the destination sale accordingly.

USMCA does not waive Section 338

USMCA (US-Mexico-Canada Agreement) provides tariff-free treatment for qualifying originating goods under the standard tariff schedule (Chapters 1 through 97 of the HTSUS). Section 338 is a separate statutory authority under 19 USC 1338 that operates outside the standard tariff framework.

The July 20 2026 proclamations explicitly state that USMCA preferential treatment does not extend to Section 338 duties. CBP guidance expected between now and August 19 will confirm that filers must apply the 50 percent Section 338 rate stacked on top of any zero USMCA MFN rate. The Section 338 charge is additive, not substitutive.

This is a critical point for filers accustomed to USMCA-qualifying Canadian goods clearing at zero duty. The USMCA claim still zeroes out the MFN duty, but the S338 50 percent surcharge is separate and applies regardless.

The T-12 to T-0 operational checklist

For importers with Canadian-origin covered goods currently in transit, in bonded warehouse, or held at a US FTZ, the operational sequence for the T-12 through T-0 window is:

Verify each SKU against the Section 338 covered goods annex. Pull the three July 20 2026 proclamations plus the expanded annex. Cross-reference each HTSUS 8-digit code in your Canadian-origin inventory against the annex. Note which SKUs are covered and which are outside scope.

Calculate the pre-S338 duty stack and the post-S338 duty stack for each covered SKU. The delta is your exposure per unit. Multiply by unit count in each bucket (in transit, in bonded warehouse, in FTZ, in domestic warehouse cleared pre-August 19).

For goods currently in a US FTZ, file the CBP Form 214 with Privileged Foreign election before August 19 for any merchandise not yet under PF status. Verify with the FTZ operator that the election is accepted and the admission record reflects PF status.

For goods in bonded warehouse under 19 USC 1555, consider withdrawal for consumption entry before August 19 to lock the pre-S338 rate. If the goods are already in demand and will be sold within 60 days, the withdrawal-and-warehouse-fee cost is typically well below the 50 percent S338 exposure.

For goods in transit that will arrive after August 19, there is no in-transit exception. Model the S338 exposure into pricing decisions or evaluate re-export via bonded warehouse if the goods are high-value and the destination sale allows delay.

Verify that USMCA rules of origin qualification does not extend to Section 338. Any legacy assumption that USMCA-qualifying Canadian goods clear at zero duty needs to be re-tested.

Document all decisions in writing for the 5-year records-audit window under 19 USC 1509(a). The BOM, purchase orders, admission documents, PF election forms, and any withdrawal documents must be preserved in a format CBP can audit.

What T-0 through T+30 looks like

Once Section 338 takes effect August 19 12:01 AM EDT, CBP CSMS bulletins will follow within T+1 to T+7 covering the technical filing details: the applicable Chapter 99 heading numbers for Section 338 (expected to be a new 9903 series distinct from Section 122's 9903.03.xx and forced-labor's 9903.05.37-9903.06.14), the tier structure if any, and the reporting requirements for line-item breakdown on CBP Form 7501.

Filers should expect ACE default behavior to be conservative in the first week (defaulting to the full S338 rate on any Canadian-origin covered good) until brokers develop confidence in filing the correct Chapter 99 heading. PSC (Post Summary Correction) at 19 USC 1520 will be the recovery pathway for any misfilings in the first week.

Records-audit exposure under 19 USC 1509(a) is 5 years from date of entry. Given the visibility and dollar magnitude of Section 338, expect CBP to run records-audit selections on Canadian-origin entries in the T+90 to T+180 window. Documentation quality on the T-12 through T-0 planning decisions will matter directly in that audit.

Litigation risk and the PF election trade-off

There is meaningful litigation risk to Section 338. Section 122 was struck down by the Court of International Trade in May 2026 (partial injunction limited to named plaintiffs, stayed by the Federal Circuit on appeal). Section 338 has similar constitutional and statutory grounds for challenge, particularly around the presidential authority to declare Canadian trade practices "unreasonable" as a Section 338 trigger.

The PF election trade-off: PF locks the pre-S338 rate but is generally irrevocable. If S338 is subsequently struck down and the pre-S338 rate is restored as the default, PF goods clear at the pre-S338 rate (the same rate they would clear at under any non-PF admission after the strike-down). No downside.

If S338 survives litigation and remains in force for the duration of the FTZ holding period, PF goods clear at the pre-S338 rate on withdrawal. Non-PF goods admitted after August 19 clear at the post-S338 rate. Meaningful upside.

The asymmetry favors PF election for any Canadian-origin covered goods currently in FTZ position. Cost of the election is a Form 214 filing. Value of the election is 50 percent ad valorem on withdrawal if S338 sticks.

For most importers with covered Canadian goods in FTZ inventory, PF election before August 19 is the highest-leverage action available in the T-12 window.