49 C.F.R. § 1280.6 Storage of classified documents.
Title 49 - Transportation
All classified documents shall be stored in the safe located in Room 5325 of the STB headquarters building. In those instances where the Emergency Coordinator is not available to receive classified documents, they may be stored, unopened, in the safe located in Room 5325.
Title 49: Transportation
PART 1280—HANDLING OF NATIONAL SECURITY INFORMATION AND CLASSIFIED MATERIAL
§ 1280.6 Storage of classified documents.