U.S. President Donald Trump has signed an executive order, "Addressing Threats to the United States by the Government of Iran", which establishes an additional ad valorem rate of duty (tariff) on imports from any foreign country that directly or indirectly purchases, imports, or acquires goods or services from Iran. The order does not set a fixed tariff rate, only providing an example rate of 25%. Instead, the Secretary of State will determine whether the additional tariff should be imposed …