Trump Signs Proclamation Imposing 15% Ad Valorem Tariff On Polysilicon Derivative Products, Plus Minimum Import Price Program On Polysilicon; Remedies Take Effect 120 Days After Signing

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https://www.whitehouse.gov/fact-sheets/2026/08/fact-sheet-president-donald-j-trump-bolsters-national-security-and-strengthens-u-s-supply-chains-by-imposing-tariffs-on-polysilicon-and-its-derivatives/