heading south. A 1974 Central Intelligence Agency (CIA) research report investigating the origins of the NLL and its significance, declassified in 2000, found that the NLL was established in an order made on 14 January 1965 by the U.S. Commander Naval Forces, Korea. An antecedent line, under a different name, had been established in 1961 by the same commander. No documentation about the line earlier than 1960 could be located by the CIA, casting doubt on the belief that the NLL was created immediately after the armistice. The sole purpose of the NLL in this original order was to forbid UNC vessels from sailing north of it without special permission. The report noted, however, that in at least two places the NLL crosses into waters presumed to be under uncontested North Korean sovereignty. No evidence was found that North Korea had recognised the NLL. While the NLL was drawn up at a time when a territorial waters limit of was the norm, by the 1970s a limit of had become internationally accepted, and the enforcement of the NLL prevented North Korea, in areas, from accessing significant territorial waters (arguably actual or prospective). In 1973, North Korea began disputing the NLL. Later, after the 1982 United Nations Convention on the Law of the Sea, the NLL also prevented North Korea from establishing an effective Exclusive Economic Zone to control fishing in the area. It is unclear when North Korea was informed of the existence of the NLL. Many sources suggest this was done promptly, but in 1973 Deputy Secretary of State Kenneth Rush stated, in a now declassified, "Joint State-Defense Message" to the U.S. Embassy in Seoul that "We are aware of no evidence that NLL has ever been officially presented to North Korea." However, South Korea argues that until the 1970s North Korea tacitly recognized the line as a sea demarcation line. North Korea recorded in their 1959 Central Almanac a partial demarcation line close to the UNC controlled islands, at about three nautical miles distance, which South Korea argues shows North Korean acceptance of the NLL as a whole. Status The border is not officially recognized by North Korea. The North Korean and South Korean navies regularly patrol the area around the NLL. As North Korea does not recognise the line, its fishing boats work close to or over the limit line, escorted by North Korean naval boats. On