Nuclear Regulatory Commission, Protection of Digital Computer and Communication Systems and Network, 10 C.F.R. 73.54, 74 Fed. Reg. 13970 (Mar. 27, 2009), as revised, 80 Fed. Reg. 67275 (Nov. 2, 2015) (full-text).
In 2009, the NRC published cyber security rule, 10 C.F.R. 73.54 "Protection of Digital Computer and Communication Systems and Network." The rule is a performance-based programmatic requirement that ensures that the functions of digital computers, communication systems, and networks associated with safety, important-to-safety, security, and emergency preparedness are protected from cyber-attacks.