CEC (California Energy Efficiency Regulations)
CEC stands for the California Energy Commission. In the United States, energy efficiency targets for external power supplies were generally set voluntarily, except in California where they were mandated by state law. In 2007, Congress enacted the Energy Independence and Security Act (EISA) based on the limits established by the CEC (the limits are the same for both). Currently, Europe has also established strict efficiency standards known as the ErP Directive (Enterprise Resources Planning).
Reference: "California Energy Commission website here"