The 30-day exemption, which is still being developed, is set to apply broadly to vessels moving oil, gasoline, diesel, liquefied natural gas and fertilizer among U.S. ports.
With tanker traffic through the strait dropping by 90%, it's not hard to draw a straight line between the ongoing conflict and widespread supply chain disruptions.
Since the U.S.-Israel war with Iran began, transportation through the vital Strait of Hormuz route has come to a standstill, briefly driving oil prices up close to $120 a barrel.
Companies remain caught between a court ruling that invalidated the tariffs, and a government that has yet to fully acknowledge how it intends to unwind them.