After more appeals, and oral arguments heard by the 9th Circuit Court of Appeals on January 27, 2006, the damages award was cut to .5 billion on December 22, 2006.The court cited recent Supreme Court rulings relative to limits on punitive damages. On May 23, 2007, the 9th Circuit Court of Appeals denied Exxon Mobil's request for a third hearing and let stand its ruling that Exxon owes .5 billion in punitive damages.

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The rules were ratified by member countries and, under International Ship Management rules, the ships are being operated with a common objective of "safer ships and cleaner oceans".

In 2009, Exxon Valdez Captain Joseph Hazelwood offered a "heartfelt apology" to the people of Alaska, suggesting he had been wrongly blamed for the disaster: "The true story is out there for anybody who wants to look at the facts, but that's not the sexy story and that's not the easy story," he said.

In 2003, fourteen years after the spill, a team from the University of North Carolina found that the remaining oil was lasting far longer than anticipated, which in turn had resulted in more long-term loss of many species than had been expected.

The researchers found that at only a few parts per billion, polycyclic aromatic hydrocarbons caused a long-term increase in mortality rates.

Some of the oil does not appear to have biodegraded at all.

A USGS scientist who analyses the remaining oil along the coastline states that it remains among rocks and between tide marks.

Hazelwood said he felt Alaskans always gave him a fair shake.

Chemical dispersant, a surfactant and solvent mixture, was applied to the slick by a private company on March 24 with a helicopter. Scientific data on its toxicity were either thin or incomplete.

The Exxon Valdez oil spill occurred in Prince William Sound, Alaska, March 24, 1989, when Exxon Valdez, an oil tanker owned by Exxon Shipping Company, bound for Long Beach, California, struck Prince William Sound's Bligh Reef at am Prince William Sound's remote location, accessible only by helicopter, plane, or boat, made government and industry response efforts difficult and severely taxed existing response plans.

The region is a habitat for salmon, sea otters, seals and seabirds.

In addition, public acceptance of a new, widespread chemical treatment was lacking.