The Trump administration is prepared to waive the Jones Act to loosen shipping rules as the Iran war continues, the White House said Thursday. 

The 100-year-old statute requires goods shipped between U.S. ports to be carried on ships that are U.S.-built, U.S.-flagged and U.S.-crewed, and it limits the number of tankers domestic shippers can use.

“In the interest of national defense, the White House is considering waiving the Jones Act for a limited period of time to ensure vital energy products and agricultural necessities are flowing freely to U.S. ports,” White House spokeswoman Karoline Leavitt said in a statement to CBS News. “This action has not been finalized.”

Waiving the rule would allow foreign ships to move fuel between U.S. ports, helping to ease supply disruptions and potentially lower energy prices, according to experts.

Oil and gas prices have surged since the U.S. and Israel attacked Iran on February 28, raising costs for motorists and creating inflationary pressures.

Brent crude, which hovered around $60 in early January, rose 8% on Thursday and briefly topped $100, according to FactSet. West Texas Intermediate, the U.S. benchmark, jumped nearly 9% to $95.02 a barrel.

Energy costs are flaring even after the Trump administration and the International Energy Agency said on Wednesday that member countries in the organization would inject a total of 400 million barrels into global energy markets to shore up oil supply. 

Gas prices, which are influenced by the cost of oil, taxes and other seasonal factors, also swung higher on Thursday, hitting $3.60 a gallon, according to AAA. That’s up about 60 cents since before the war started.