other states use the International Nautical Mile, adopted by the United States in 1954. The exact definition of the shoreline, dividing state waters offshore and potential private land onshore, depends on state law. Shifting shorelines in the vicinity of oil fields have been a thorny issue. In the Goose Creek field along the coast in Harris County, Texas, so much oil was produced that the ground elevation sank ten or more feet, putting some privately owned oil-producing lands below sea level. The state of Texas then declared that the newly submerged land, along with its oil revenue, was state property. Federal ownership Traditionally, nations owned the territory extending from shore. In 1945, President Harry Truman issued a proclamation extending US jurisdiction over mineral resources to the edge of the continental shelf; the proclamation was codified by Outer Continental Shelf Lands Act of 1953. The Geneva Convention on the continental shelf in 1958 recognized the right of each nation to the mineral resources on its adjacent continental shelf, out to a water depth of 200 m. In 1983, President Ronald Reagan issued a proclamation extending the US Exclusive Economic Zone to from the shore. By virtue of the Law of the Sea, which the US has signed but not ratified, each nation controls an Exclusive Economic Zone (EEZ) that extends from its shore. The EEZ confers exclusive rights to a nation to explore and produce minerals, including oil and gas. In areas within 200 nautical miles of two or more nations, the territorial line is drawn equidistant from the shores of the two nations. The US and Canada referred a dispute over the EEZ boundary in the Atlantic Ocean to the International Court of Justice, which decided the matter (see Georges Bank). Article 76 of the Law of the Sea provides that nations may under certain circumstances extend their EEZs beyond the 200 nautical mile limit, to up to from shore. The 200 nautical mile EEZ left a small area in the western Gulf of Mexico enclosed by the EEZs of the United States and Mexico, but outside the EEZ of either nation (the "doughnut hole"). The US and Mexico concluded a treaty to divide the area between them. A second, and as yet unresolved "doughnut hole" exists in the eastern Gulf of Mexico, bordered by the EEZs of the US, Mexico, and Cuba. Leasing and drilling on federal offshore seabed