There are many brands of tequila; the Consejo Regulador del Tequila reports 901 registered brands from 128 producers for the year 2008
Mexican laws state that tequila can be produced only in the state of Jalisco and limited regions in the states of Guanajuato, Michoacán, Nayarit, and Tamaulipas.
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 that Mexico just wanted to create bottling jobs in their own country. Liquor companies in the United States 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.
All authentic, regulated Tequilas will have a NOM identifier on the bottle. The important laws since 1990 were NOM-006-SCFI-1993 and the later update NOM-006-SCFI-1994 and the most recent revision in late 2005, NOM-006-SCFI-2005.
The NOM applies to all processes and activities related to the supply of agave, production, bottling, marketing, information and business practices linked to the distilled alcoholic beverage known as Tequila. Tequila must be produced using Agave of the species Tequilana Weber Blue variety, grown in the federal states and municipalities indicated in the Declaration. Furthermore, the NOM establishes the technical specifications and legal requirements for the protection of the Appellation of Origin of "Tequila," in accordance with the current General Declaration of Protection of the Appellation of Origin of "Tequila," the Law, the Industrial Property Law, the Federal Consumer Protection Law and other related legal provisions.
The number after NOM is the distillery number, assigned by the government. NOM does not indicate the location of the distillery, merely the parent company or - in the case where a company leases space in a plant - the physical plant where the tequila was manufactured.
Since 2002, sales of high priced tequilas, called "ultra-premium" and "super-premium" by marketers, have increased 28 percent. That is an average growth rate of 8.6 percent per year, as reported by the Distilled Spirits Council of the United States. Sales exceeded expectations by reaching well over 10 million cases as shown in the 2007 report by IWSR based on Adams Liquor Handbook. In the late 1990s and early 2000s, increasing worldwide popularity of tequila drove corporate interest in tequila. Notable developments as a result included:
* The purchase of Herradura by Brown-Forman for $776 million in September 2006.
* A new NOM (Norma Oficial Mexicana) for tequila (NOM-006-SCFI-2005) was issued in 2006, and among other changes, introduced a category of tequila called "extra añejo" or "ultra-aged" which must be aged a minimum of 3 years.
* The purchase of the Sauza and El Tesoro brands by massive holding company Fortune Brands.
The Tequila Regulatory Council of Mexico 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 pure agave tequila, which still could not be flavored.
A one-liter bottle of limited-edition premium tequila was sold for $225,000 in July 2006 in Tequila, Jalisco, by the company Tequila Ley .925. The bottle which contains the tequila is a two-kilo display of platinum and gold. The manufacturer has received the Certificate from Guinness World Records for the most expensive bottle of spirit ever sold.