Additional section 232 duties on unmanned aircraft systems applied to goods entered for consumption, or withdrawn from warehouse, at 12:01 a.m. eastern time on 3 September [E1]. The proclamation of 13 August set a 100 percent ad valorem rate on UAS with a maximum take-off weight of more than 25 kilograms, on UAS that integrate thermal imagers, on docking stations, and on critical components listed in Annex I [E1]. UAS of 25 kilograms or less, listed in Annex II, face 25 percent [E1]. Those rates sit on top of other applicable duties unless the text says otherwise [E1].
Commerce had told the President that foreign UAS and their parts were being imported in such quantities and under such circumstances as to threaten to impair national security [E1]. The Secretary’s report called UAS essential to military operations, law enforcement, infrastructure protection and a list of civil tasks, and said the United States was too reliant on foreign sources for motors, speed controllers, lithium-ion batteries and docking stations [E1]. Heavier airframes were singled out because they can more easily be used for weapons-related purposes and are more likely to carry sophisticated surveillance gear [E1].
A second 25 percent rate on certain components in Annex III does not start on 3 September [E1]. It takes effect at 12:01 a.m. eastern time on 9 February 2027, 180 days after the proclamation, to leave time for more domestic production [E1]. Companies on the Defense Department’s Blue UAS cleared list or framework, or on the FCC’s Conditional Approval list as of 2 September 2026, also get that 180-day delay for the covered products and their components [E1]. The 3 September clock is therefore the main airframe and docking-station gate, not every listed part [E1].
Ally-origin product can pay less if the content test is met [E1]. For Japan, Korea, Taiwan, Switzerland, Liechtenstein or an EU member, the duty is capped at 15 percent ad valorem, including the column-1 HTSUS rate, only if substantially all critical components and technology are certified as products of the United States or those partners [E1]. United Kingdom product is capped at 10 percent under the same certification [E1]. Commerce is to tell Customs which products qualify [E1].
The proclamation also authorizes an onshoring program [E1]. Firms that commit to build, refurbish or expand U.S. plants for covered products before 20 January 2029 can, if Commerce approves the plan, import supply-chain goods and production equipment without the section 232 duties during construction, in volumes matched to anticipated output [E1]. Failure to meet those commitments can end the benefit; fraud can make the clawback retroactive [E1].
Same-day coverage treated the 3 September entry as the news, not a fresh proclamation [E2]. The legal text had been public since 13 August; the operating fact on Thursday was that the 12:01 a.m. eastern gate had opened [E1][E2]. No Customs first-day volume table accompanied the proclamation [E1].
A 100 percent line now sits on the heavy and thermal-equipped airframes that the Secretary said matter most for weapons and surveillance, while smaller craft pay a quarter and some listed parts wait until February [E1]. The ally caps and the Blue UAS delay are the holes in that wall [E1]. Thursday was the first morning importers had to classify against it [E1][E2].