 The standards are prepared by the "Dirección General de Normas (DGN)" (General Directorate of Standards), which is the body representing Mexico in the International Organization for Standardization (ISO).In the case of tequila, Mexico's Tequila Regulatory Council (CRT) regulates production NOMs.The NOM identifier means the tequila meets government standards - but this is not any guarantee of tequila's quality.