1966The US Congress passed Public Law 89-658, which extended the U.S. fisheries zone nine miles beyond the three-mile territorial sea.Economy and Industry, Maritime & Fishing Industry
Congress extended the three-mile territorial limit of U.S. coastal jurisdiction to 12 miles to prevent foreign factory ships from dominating the inshore fisheries. This extension only affected fishing rights in the expanded zone. It would take another 22 years before the U.S. declared absolute sovereignty over the seabed, waters, and air rights within the 12-mile zone under Presidential Proclamation 5928 issued by President Ronald Reagan.
Congress.gov. “S.2218 - An Act to Establish a Contiguous Fishery Zone beyond the Territorial Sea of the United States,” n.d. https://www.congress.gov/bill/89th-congress/senate-bill/2218/text.