On March 4, 2021, the NRC issued a severity level III Notice of Violation to Arizona Public Service Company’s Palo Verde Nuclear Generating Station Units 1, 2, and 3 for a violation of Title 10 of the Code of Federal Regulations (CFR) Parts 50.9(a) and 55, for providing information to the NRC that was not complete and accurate concerning the medical fitness of a licensed reactor operator.