Mexico first adopted energy efficiency standards in 1995 under the National Commission for Energy Saving (CONAE). In 1995, Mexico also introduced the Sello FIDE, a voluntary energy efficiency endorsement label awarded by the Fideicomiso para el Ahorro de Energía Eléctrica (FIDE). In 2008, the Law for Sustainable Use of Energy transferred authority for energy efficiency standards from CONAE to the just-created National Commission for Energy Efficiency (CONUEE). CONUEE has established energy efficiency standards for a total of 15 product categories and seven system categories. CONUEE also regulates a mandatory comparative energy label for domestic appliances.