Oil spill governance in the United States debates is illustrated in the question "who is liable in the case of a vessel spill?" The cargo owner or the ship operator/ owner? Another significant issue was the interaction of domestic legislation and international measures. In 1980's, international agreements being considered would take over oil spills federal and state laws adding further complexity to party liability. However, after the "Exxon Valdez" incident, the short comings of the patchy framework for oil spill governance was apparent and growing pressure placed on lawmakers resulted in the establishment of the more comprehensive Oil Pollution Act of 1990. The Oil Pollution Act (1990):
Oil spill governance in the United States important role in creating external networks for governing oil spills in the U.S. international treaties when signed by the U.S. are on the same level as federal law, hence signatory parties must implement domestic legislation to reflect the agreement. This mechanism helps to engineer a number of federal laws governing oil spills such as the intervention on the High Sea Act of 1974. International conventions serve a key role in developing standards for oil carrying vessels from different nations into the U.S. The two major conventions which have contributed to oil spill governance are the 1969 International Convention Relating to