The Jones Act is a little-known federal law that prohibits foreign-flagged ships from shuttling goods between US ports.
The Federal Highway Administration said Thursday that it would immediately make the emergency relief funds available to the USA territory to help restore service on roads and bridges badly damaged by the storm. "That does not get rebuilt in days".
President Donald Trump waived the Jones Act after both Hurricane Harvey and Hurricane Irma to aid in the relief effort, but when he was initially approached about waiving it for Puerto Rico, he made excuses.
Looks like a recent request directly from Rosselló has swayed 45.
Shipping company Crowley said it had 3,000 containers there, filled with clothes, food, medicine, water, construction materials and even cars.
"Texas & Florida are doing great but Puerto Rico, which was already suffering from broken infrastructure & massive debt, is in deep trouble", he wrote in a series of posts on Monday.
On Thursday, the Trump administration waived a law to allow foreign vessels to assist in Puerto Rico's relief effort. That will help Puerto Rico recover after being walloped by Hurricane Maria. Kim, or someone else in the military, should have the highest decision-making power on the island for a temporary period of time.More news: Chicago's Chris Redd, Luke Null to be 'SNL' featured players
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But shipping companiesalready have aid and supplies either waiting at the port to be delivered - or held up at ports on the USA mainland.
Nydia Velazquez, a New York Democrat who was born in Puerto Rico, also urged Mr Trump to approve a waiver saying the disaster could prove to be "his Hurricane Katrina".
Trump himself said as much when chatting with reporters briefly Wednesday: "We're thinking" about lifting it, he said, but "a lot of people who are in the shipping industry don't want it" lifted.
The partnership says the focus needs to be on finding more trucks and drivers - not ships.
In signing a 10-day waiver that covers all products being shipped to Puerto Rico, Department of Homeland Security acting Secretary Elaine Duke side-stepped that controversy.
The presenter of the video said the hospital she was in had "no water, no cash", and added that "the hospital is completely full with no generators, so they have open windows".
Rubio said the Trump administration is concerned about victims on the island.