31 C.F.R. § 2.2 Classification Authority.
Title 31 - Money and Finance: Treasury
Designations of original classification authority for national security information are contained in Treasury Order (TO) 102–19 (or successor order), which is published in the [63 FR 14357, Mar. 25, 1998]
Title 31: Money and Finance: Treasury
PART 2—NATIONAL SECURITY INFORMATION
Subpart A—Original Classification
§ 2.2 Classification Authority.

