 Internationally, mezcal has been recognized as an Appellation of Origin (AO, DO) since 1994.There is also a Geographical Indication (GI), originally limited to the states of Oaxaca, Guerrero, Durango, San Luis Potosí, Puebla and Zacatecas.Similar products are made in Jalisco, Guanajuato, Michoacán, and Tamaulipas, but these have not been included in the mezcal DO.