On March 3, 2003, the Federal Energy Regulatory Commission (FERC) published in the Federal Register its final rule restricting access to critical energy infrastructure information (CEII) and establishing new procedures outside of the Freedom of Information Act (FOIA) for requesting access. FERC began this process in response to the terrorist acts committed on September 11, 2001, and published its Notice of Proposed Rulemaking on September 13, 2002, to obtain public comments.