<h1>25% tariff on imports linked to countries trading with Iran alters trade flows and raises costs for foreign exporters</h1> A unilateral trade measure was announced imposing a 25% tariff on imports from countries that trade with Iran, declared effective immediately by the United States executive; the legal change establishes a punitive tariff rate applicable to goods linked to Iran's trading partners and operates to raise import costs, alter trade flows, and subject foreign exporters and their trading partners to U.S. customs duty liability. The measure is stated to be a coercive economic tool aimed at pressuring Iran over its domestic conduct and may trigger trade displacement or retaliatory measures.