The U.S. is temporarily waiving the Jones Act. Here’s what to know

As the U.S. and Israel’s war against Iran continues to upend energy markets and supply chains worldwide, the Trump administration says it will temporarily waive maritime shipping requirements under a more than century-old law known as the Jones Act.

The Jones Act requires that goods hauled between U.S. ports be moved on U.S.-flagged vessels. Passed in 1920, this law aims to protect the American shipping sector — but it’s also faced criticism over the years for slowing the delivery of goods...