classified information
(1) Classified information The term “classified information” means any information that has been determined pursuant to Executive Order 13526 , any predecessor or successor order, or sections 1-274, 275-321, and 1001-3115 of the Atomic Energy Act of 1954 ( 42 U.S.C. 2011 -2021, 2022-2286i, 2296a-2297h-13) to require protection against unauthorized disclosure and that is so designated.