President Donald Trump signed Presidential Proclamation 11055 on 13 August under Section 232, the US national-security tariff statute, and the Federal Register published the text on 19 August1. From 3 September a 100 per cent duty falls on the uncrewed aircraft systems, docking stations and critical components listed in Annex I. Annex II, which covers finished aircraft, is taxed at 25 per cent. A third tranche of components, in Annex III, joins them at 25 per cent from 9 February 2027, and the Commerce Secretary may move items onto either list by notice.
The rate structure inverts the usual order of protection. Charging four times as much on the part as on the whole aircraft penalises the importer who assembles in America and spares the one who ships a complete airframe in. A Chinese-made docking station cleared on 3 September costs twice what the same unit cost in August.
One clause reopens the door. A company with an approved US onshoring plan, with construction committed before 20 January 2029, may bring those components in duty-free while its factory goes up. Annex I therefore runs as two instruments at once: a penalty on the imported part and a tariff holiday for anyone laying foundations. The sorting is done by balance sheet, because only a firm that can commit construction capital reaches the exempt lane.
Readers of this topic were told in June that the Section 232 investigation had passed its statutory deadline with nothing published. The outcome is heavier than the trade press had priced, and it lands on parts and ground equipment rather than on finished aircraft alone.
