[Code of Federal Regulations] [Title 14, Volume 5] [Revised as of January 1, 2008] From the U.S. Government Printing Office via GPO Access [CITE: 14CFR1203.501] [Page 20] TITLE 14--AERONAUTICS AND SPACE SPACE ADMINISTRATION PART 1203_INFORMATION SECURITY PROGRAM--Table of Contents Subpart E_Derivative Classification Sec. 1203.501 Applying derivative classification markings. Persons who apply derivative classification markings shall: (a) Observe and respect original classification decisions: (b) Verify the information's current level of classification so far as practicable before applying the markings; and (c) Carry forward to newly created documents any assigned authorized markings. The declassification date or event that provides the longest period of classification shall be used for documents classified on the basis of multiple sources. [44 FR 34913, June 18, 1979, as amended at 48 FR 5891, Feb. 9, 1983]