Energy Policy Act of 2005, Pub. L. No. 109-58 (Aug. 8, 2005) (full-text).
Section 1211 of the Act ("Electric Reliability Standards") addressed the need for cybersecurity standards to protect the energy infrastructure. It included a requirement that the Federal Energy Regulatory Commission (FERC) establish an Electric Reliability Organization (ERO) to establish and enforce reliability standards for the reliable operation of existing bulk power system facilities, where "reliable operation" is understood to mean prevention of instability, uncontrolled separation, or cascading failures of bulk power systems as a result of a sudden disturbance, including a cybersecurity incident.