Exxon Valdez oil spill a number of recommendations, such as changes to the work patterns of Exxon crew in order to address the causes of the accident. In response to the spill, the United States Congress passed the Oil Pollution Act of 1990 (OPA). The legislation included a clause that prohibits any vessel that, after March 22, 1989, has caused an oil spill of more than in any marine area, from operating in Prince William Sound. In April 1998, the company argued in a legal action against the Federal government that the ship should be allowed back into Alaskan waters. Exxon claimed OPA was
Exxon Valdez oil spill responsible" for the spill, because they had granted mariners' licenses to the crew of the Valdez, and because they had given the "Valdez" permission to leave regular shipping lanes to avoid ice. They also reiterated the claim that the Coast Guard had delayed cleanup by refusing to give permission to immediately use chemical dispersants on the spill. The Oil Spill Recovery Institute was formed after United States Congress approved it to seek a solution. Collaborating with InnoCentive they found a partial solution for the flow of oil. A report by the US National Response Team summarized the event and made