President Trump signed Proclamation 11055 on 13 August, published 19 August, taxing drone components at 100 per cent and finished aircraft at 25 per cent from 3 September under Section 232, a trade law that lets the president act on national-security grounds.
A second 25 per cent tariff tranche follows in February 2027. Firms with an onshoring plan approved before January 2029 skip the duty, turning the tariff into a deadline for building US factories.
