Can tequila be produced outside of Mexico?
"Just like Champagne or Cognac in France must be made there to be considered to bear the name, tequila can only be called tequila if it is produced and bottled in Mexico in the state of Jalisco and limited regions in the Mexican states of Guanajuato, Michoacán, Nayarit and Tamaulipas."
"The highlands of Mexico, where Don Julio is produced, are characterized by a rich, clay soil that is distinguished by a vibrant red color and filled with nutrients. Agaves planted in the highlands generally have a higher sugar content and mature more slowly than those planted in the lowlands due to the cooler temperatures. As a result, tequila created in the highlands has a sweeter, more floral and fruitier flavor than lowland tequila."