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.
President Donald Trump had previously vowed to offer insurance guarantees and possible U.S. Navy escorts to oil tankers transiting the Strait of Hormuz.
The ruling provides long-awaited clarity for businesses, given that the Supreme Court did not address the issue of refunds when it overturned the levies.
The two leaders also agreed to expand cooperation in new areas of growth, such as shipbuilding, nuclear power, supply chain and artificial intelligence.