The NOM (Normas Oficiales Mexicanas) mark is Mexico's mandatory safety label, indicating that a product complies with the relevant NOM standards. The NOM mark applies to most products, including telecommunications and information technology equipment, household electrical appliances, lighting products, and other goods that may pose potential risks to health and safety. Both locally manufactured and imported products must comply with the applicable NOM standards and product labeling regulations.

According to Mexican law, the holder of the NOM certificate must be a Mexican company, which is responsible for the product's quality, maintenance, and reliability. Test reports are issued by laboratories accredited by SECOFI (the Ministry of Economy) and reviewed by SECOFI, ANCE, or NYCE. If the product meets the relevant regulatory requirements, a certificate is issued to the Mexican representative of the manufacturer or exporter, and the product may then bear the NOM mark.