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WASHINGTON — 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.

At @ricardorossello request, @POTUS has authorized the Jones Act be waived for Puerto Rico. It will go into effect immediately. — Stephanie Grisham (@PressSec) September 28, 2017

Her tweet comes after Puerto Rico Gov. Ricardo Rosselló said he asked the White House to loosen the regulations Wednesday night.

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.

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.

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 Sens. John McCain, R-Arizona, and Marco Rubio, R-Florida — had urged the suspension of the Jones Act in order to speed up supply deliveries.