Key Facts

- On September 8, 2026, President Donald J. Trump issued Proclamation 11065, which modifies the product scope of additional duties on certain Canadian goods that were originally imposed under Section 338 of the Tariff Act of 1930 [1].

- The duties target Canadian motor‑vehicle and auto‑parts exports that the President previously identified as discriminatory toward U.S. commerce in Proclamation 11048 of July 20, 2026 [1].

- After a three‑day suspension of the duties lapsed, the additional ad valorem duties became effective at 12:01 a.m. Eastern Time on August 22, 2026 [1].

- Senior executive‑branch officials advised that the scope modification would continue to offset the burden on U.S. commerce and serve the public interest [1].

- The President relied on the authority granted by Section 338 of the Tariff Act of 1930 to impose and adjust the duties [1].

Background to the Proclamation

The September 8, 2026 proclamation follows a rapid series of trade‑related actions taken earlier in the summer. The sequence began with Proclamation 11048 on July 20, 2026, in which the President found that Canada’s motor‑vehicle tariff scheme discriminated against U.S. exporters. The proclamation described the Canadian measures as "unreasonable, not equally enforced, and burdensome" and asserted that they placed U.S. commerce at a disadvantage relative to other countries [1]. Under Section 338 of the Tariff Act of 1930, the President imposed additional ad valorem duties on a defined set of Canadian motor‑vehicle products, with an initial effective date of August 19, 2026 [1].

On August 18, 2026, Canada announced a commitment to remove the alleged discriminatory treatment. In response, the President issued Proclamation 11056, temporarily suspending the duties for three days while Canada’s pledge was evaluated [1]. The suspension was intended to give Canada a narrow window to demonstrate compliance. However, on August 21, 2026, the administration recorded that Canada "reneged on its commitment, ceased negotiating in good faith, and did not remove the discrimination" [1]. Consequently, the suspension expired at 12:01 a.m. ET on August 22, 2026, and the duties took effect as originally scheduled [1].

The September 8 proclamation therefore represents the next procedural step. Rather than introducing a new set of duties, the President adjusted the existing framework to reflect new information and recommendations received from senior officials. This approach is consistent with the statutory flexibility built into Section 338, which permits the President to modify duty parameters when circumstances change [1].

Mechanics of the Scope Modification

Proclamation 11065 opens with a clear statement that the President is "modifying the duties imposed under Proclamation 11048 after receiving certain information, opinions, and recommendations from senior executive‑branch officials" [1]. The language underscores that the adjustment is not a fresh imposition but a recalibration of the existing duty schedule. By invoking Section 338 again, the proclamation reaffirms the legal foundation for both the original duties and any subsequent changes [1].

The document does not list the specific Canadian products that are being added to or removed from the duty schedule. Instead, it notes that the scope has been altered "to continue offsetting the burden or disadvantage on U.S. commerce and better serve the public interest" [1]. Senior officials are quoted as saying that, although the duties as amended already offset the burden, further modification would still achieve that goal and would align with the public interest [1]. The record therefore confirms that the President acted on the basis of senior officials’ analysis, but it does not provide a detailed product enumeration or quantitative assessment of the expected trade impact.

The proclamation does not indicate that any new legal authority beyond the Section 338 framework was invoked. The text simply states that the President is exercising the authority already granted in July 2026 to adjust the duty regimen [1].

Practical Effects on Trade

The record does not specify the practical effect of the September 8 proclamation on importers of Canadian motor‑vehicle‑related products. It also does not enumerate which products are newly covered or exempted, nor does it provide guidance on how market participants should determine applicability. Consequently, the record does not address whether importers must consult an updated tariff schedule or what procedural steps they should follow to comply with the revised scope.

The proclamation does not quantify any competitive advantage that U.S. exporters of motor‑vehicle components might obtain as a result of the scope change. No data or analysis of cost‑of‑goods impacts, pricing adjustments, or market share shifts is included in the text.

Likewise, the document does not discuss the operational implications for customs brokers, financing institutions, or logistics firms. There is no mention of required changes to compliance procedures, documentation, or financing arrangements.

In sum, while the proclamation confirms that the duty regime remains in force and that its scope has been altered, the record does not provide detailed guidance on how the modification translates into day‑to‑day trade operations, nor does it outline any further diplomatic or policy steps beyond the expressed intent to continue using Section 338 tools as needed [1].

What to Watch

- **August 22, 2026** – Additional ad valorem duties on Canadian motor‑vehicle products became effective after the three‑day suspension lapsed [1].

- **September 8, 2026** – Proclamation 11065 modified the scope of products subject to those duties [1].

- The proclamation does not include specific filing deadlines, rate adjustments, or a timetable for future reviews [1].

- Senior executive‑branch officials continue to monitor the situation, but the record does not set a concrete date for any subsequent review or amendment [1].

- Stakeholders should watch for any future updates from the U.S. International Trade Commission, U.S. Customs and Border Protection, or the Office of the United States Trade Representative that may clarify product classifications or provide an updated tariff schedule.

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*All statements are based on the text of Proclamation 11065 and related proclamations issued in 2026, as documented in the White House Presidential Actions archive.*