The evidence provided strongly and consistently supports the truthfulness of the statement. Multiple high-authority sources corroborate the claim from different angles. The BBC confirms President Trump threatened a 25% tariff, and The Chosun Ilbo, a major newspaper, reports directly that the tariff was imposed via an executive order. This is further supported by industry and legal sources. A legal update from Gibson Dunn confirms the signing of an Executive Order authorizing the use of "secondary tariffs," which is the specific mechanism for this type of action. Furthermore, Supply Chain Dive reports that the U.S. Trade Representative was tasked with creating the rules for the tariff, indicating that the authorization had moved to the implementation phase. The official White House communication, while not specifying the 25% figure, confirms that executive action was taken to address threats from Iran, providing official context. Finally, an industry blog points to a post on Truth Social by President Trump as the primary announcement. The one irrelevant source, which discusses tariffs related to Cuba, does not contradict the body of evidence. The collective weight and consistency of the relevant sources make it highly probable that President Trump did authorize the tariff.