The White House has authorized a waiver to loosen shipping rules regarding Puerto Rico that island officials say would be a significant help for recovery efforts from Hurricane Maria. “At @ricardorossello request, @POTUS has authorized the Jones Act be waived for Puerto Rico. It will go into effect immediately,” White House press secretary Sarah Sanders tweeted Thursday morning. Acting Department of Homeland Security Secretary Elaine Duke said the waiver will be in effect for 10 days and will cover all products being shipped to Puerto Rico, according to a release from the department. The waiver will guarantee the needed equipment to repair infrastructure damaged by the storm and restore emergency services, Duke said in a news release. After the 10-day period, the waiver can be extended if needed, DHS spokesman David Lapan told CNN. He said the waiver was approved after it was determined that doing so was in the interest of national defense. Earlier Thursday, Puerto Rico Gov. Ricardo Rosselló said he had asked the White House to loosen the regulations. He joined the growing list of officials who argued that lifting the the Jones Act – a federal law designed to protect the financial interests of US shipbuilders by limiting shipping by foreign vessels – would help expedite supplies to the ravaged island. The act has had the unintended consequence of making it twice as expensive to ship things from the US mainland to Puerto Rico as it is to ship from any other foreign port in the world, according to Arizona Republican Sen. John McCain’s office. DHS denies that it rejected request to loosen shipping rules for Puerto Rico The act was quickly lifted to help Texas and Florida in the wake of hurricanes Harvey and Irma. The Department of Homeland Security said it was able to lift the restrictions quickly because the Department of Defense requested a waiver for those states and the department hadn’t yet done so for Puerto Rico. Trump told reporters on Wednesday that “we’re thinking” about lifting the law, but added that a “lot of shippers” didn’t want it lifted. What the Jones Act controversy is all about In the wake of the devastation in Puerto Rico caused by Hurricane Maria, San Juan Mayor Carmen Yulín Cruz – along with other US politicians, including McCain and Marco Rubio, R-Florida – had urged the suspension of the Jones Act in order to speed up supply deliveries. The Jones Act was waived earlier this month to provide relief assistance prior to Hurricane Irma’s landfall, DHS said.