 However, without the NOM stamp of legitimacy, it is not guaranteed that the bottle contains tequila.All 100% agave tequilas must 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 revised in late 2005 NOM-006-SCFI-2005 and the most recent revision in 2012.