Hormuz blockade and tariff threat

The United States military said it began blockading ships entering or leaving Iranian ports at 10 a.m. Eastern on Monday, April 13. (centcom.mil) United States Central Command said the order applies to “all maritime traffic” bound for Iranian ports and coastal areas on both the Arabian Gulf and Gulf of Oman sides of the country. It said vessels using the Strait of Hormuz for non-Iranian ports would still be allowed through. (centcom.mil) President Donald Trump separately said on April 8 that the United States would impose 50 percent tariffs on imports from any country supplying Iran with military weapons, with no exemptions. Reuters reported the threat was framed as an immediate secondary tariff, aimed at third countries rather than Iran itself. (cnbc.com) China responded on Monday by urging “calm and restraint” and saying any blockade of the Strait of Hormuz would run against the interests of the international community. Reuters, via United States News and World Report, said Beijing made the comment after Trump tied the shipping move and tariff threat to the Iran crisis. (usnews.com) The shipping order followed failed United States-Iran talks in Islamabad over the weekend. The Washington Post and National Public Radio reported Vice President J.D. Vance said Iran had refused United States terms that included a commitment not to develop a nuclear weapon. (washingtonpost.com) (npr.org) The Strait of Hormuz is the narrow sea lane between Iran and Oman that connects the Persian Gulf to the open ocean. United States Central Command said mariners should monitor naval warnings in the Gulf of Oman and the Strait’s approaches, a sign that the order affects traffic around one of the world’s busiest oil routes. (centcom.mil) (abc.net.au) Market coverage on Monday linked the move to fears of tighter oil flows and higher shipping risk. Military.com reported the blockade risked pushing oil prices higher, while United States of America Today said oil prices were already rising as the order took effect. (military.com) (usatoday.com) Trump’s tariff threat has also drawn legal questions inside the United States. Politico reported on April 8 that trade lawyers said the path for a blanket 50 percent tariff on countries accused of arming Iran was unclear without formal executive action or a published legal rationale. (politico.com) For now, the policy is two tracks at once: a naval order that can stop ships at sea and a tariff threat that can punish countries on land. Monday’s test is whether ships keep moving past Iran without calling at its ports — and whether Beijing changes course or calls Trump’s bluff. (centcom.mil) (usnews.com)