National Security Information Handbook

2-204 Classification Categories ................................................................................. 2-2
2-205 Limitations and Prohibitions............................................................................ 2-3
2-206 Documents Proposed for Original Classification Decisions............................ 2-3
2-207 Duration of Classification................................................................................ 2-4
2-208 Security Classification Guides......................................................................... 2-5
2-209 Declassification Guides ................................................................................... 2-6
2-210 Reclassification of Information........................................................................ 2-6
2-211 Downgrading Classified Information .............................................................. 2-7
2-212 Classification Challenges................................................................................. 2-8
Section 3: Derivative Classification.............................................................................. 2-9
2-300 Derivative Classification Principles................................................................. 2-9
2-301 Derivative Classification Procedures............................................................. 2-10
Section 4: Dissemination Control Markings.............................................................. 2-11
CHAPTER 3: ....DECLASSIFICATION ......................................................... 3-1
Section 1: Overview ...................................................................................................... 3-1
3-100 Overview.......................................................................................................... 3-1
Section 2: General......................................................................................................... 3-1
3-200 Requirement..................................................................................................... 3-1
Section 3: Declassification Systems ............................................................................. 3-2
3-300 Automatic Declassification.............................................................................. 3-2
3-302 Systematic Declassification Review................................................................ 3-3
3-303 Mandatory Declassification Review................................................................ 3-3
Section 4: National Declassification Center................................................................. 3-5
3-400 Purpose............................................................................................................. 3-5
3-401 Responsibilities................................................................................................ 3-5
CHAPTER 4: ....IDENTIFICATION AND MARKING ................................. 4-1
Section 1: Overview ...................................................................................................... 4-1
4-100 Overview.......................................................................................................... 4-1
Section 2: General......................................................................................................... 4-1
4-200 Requirements ................................................................................................... 4-1
4-201 Marking Standards........................................................................................... 4-1
Section 3: Original Classification Markings .............................................................. 4-2
4-300 Required Original Classification Markings ..................................................... 4-2
Section 4: Derivative Classification Markings ........................................................... 4-3
4-400 Required Derivative Classification Markings.................................................. 4-3