Information may be classified as national security information by a designated original classifier of the Department if it is determined the information concerns one or more of the categories described in section 1.4 of E.O. 13526. The levels established in section 1.2 of E.O. 13526 (Top Secret, Secret, and Confidential) are the only terms that may be applied to national security information. Except as provided by statute, no other terms shall be used within the Department for the three classification levels.