markets. Don Cenobio's grandson Don Francisco Javier gained international attention for insisting that "there cannot be tequila where there are no agaves!" His efforts led to the principle that real tequila can come only from the State of Jalisco. The first tequila distillery in the United States was opened in 1936 in Nogales, Arizona by Harry J. Karns, former Arizona state senator and Nogales Mayor. In a move to take ownership of the term "tequila", the Mexican government declared the term to be its intellectual property in 1974. Recent history Although some tequilas have remained as family-owned brands, most well-known tequila brands are owned by large multinational corporations. However, over 100 distilleries make over 900 brands of tequila in Mexico and over 2,000 brand names have been registered (2009 statistics). Due to this, each bottle of tequila contains a serial number (NOM) denoting in which distillery the tequila was produced. Because only so many distilleries are used, multiple brands of tequila come from the same location. In 2003, Mexico issued a proposal that would require all Mexican-made tequila be bottled in Mexico before being exported to other countries. The Mexican government said that bottling tequila in Mexico would guarantee its quality. Liquor companies in the United States said Mexico just wanted to create bottling jobs in their own country, and also claimed this rule would violate international trade agreements and was in discord with usual exporting practices worldwide. The proposal might have resulted in the loss of jobs at plants in California, Arkansas, Missouri, and Kentucky, because Mexican tequila exported in bulk to the United States is bottled in those plants. On January 17, 2006, the United States and Mexico signed an agreement allowing the continued bulk import of tequila into the United States. The agreement also created a "tequila bottlers registry" to identify approved bottlers of tequila and created an agency to monitor the registry. The Tequila Regulatory Council of Mexico (TRCM) originally did not permit flavored tequila to carry the tequila name. In 2004, the Council decided to allow flavored tequila to be called tequila, with the exception of 100% agave tequila, which still cannot be flavored. A new Norma Oficial Mexicana (NOM) for tequila (NOM-006-SCFI-2005) was issued in 2006, and among other changes, introduced a class of tequila called extra añejo or "ultra-aged" which must be aged a minimum of three years. A one-liter bottle of limited-edition