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UNSC WARNING: This document, UNSC Information Classification System, is property of the UNSC and is Classified [NOVEMBER BLACK], protected under Office of Naval Intelligence Security Protocol 1A. Disclosure of its contents to, or access or alteration by, personnel with a clearance level lower than GAMMA THREE is an offense punishable by court(s) martial and imprisonment or execution for treasonous acts. Failure to disclose confirmed or suspected breaches of security will be treated as complicity, and is punishable by dishonourable discharge and/or imprisonment.
Lieutenant Commander Michael Pomare, Office of Naval Intelligence, UNSCDF Navy
ONI Seal 1


Top Secret





Supplemental Classifications

Security Clearance Grades

Alpha One

Beta Two

Gamma Three

Delta Four

Epsilon Five

Zeta Six

Eta Seven

Theta Eight

Iota Nine

Kappa Ten

Lambda Eleven

Mu One

Nu Two

Xi Three

Omicron Four

Pi Five

Rho Six

Sigma Seven

Tau Eight

Upsilon Nine

Phi Ten

Chi Eleven

Psi Twelve


Gregorian Supplemental System

A system designed to let a reader know the type of contents a file holds without opening it seems contrary to the purpose of a classification system, which aims at squashing any and all information that has been classified. Nevertheless, there are situations where security clearance must be insufficient to access particular files - a Delta Seven or higher clearance member of the MID, for example, has access to a range of TOP SECRET files, but is excluded from certain classes of material, such as September Blue, which are exclusive to Gamma Three grade, or November Black, which is exclusive to Omega-grade clearance.

January Amber

January Amber

February Green


March Bronze

March Bronze status is granted to files and information deemed damaging to inter-branch cooperation. It is no secret that both the Military Intelligence Division and the Office of Naval Intelligence have both vied for supremacy in the fields of expionage/counter espionage, propaganda and special warfare deployment and development. Is is even less of a secret that ONI has been more successful than the MID. Inter-departmental rivalry is rife between organisations within the UNSC, and August Orange was deemed a necessity to prevent conflict between rival groups.

April Violet


May Indigo


June Azure


July Red


August Orange

August Orange

September Blue

September Blue status is granted to files and information pertaining to ongoing internal investigations, and is used exclusively by ONI Section Zero, the Office of Naval Investigations. Given the high clearance levels many of its personnel possess, September Blue status is a necessity to prevent potential threats from uncovering information pertaining to them or their suspected activities, and is enforced by Class Three Sentinel-class artificial intelligences or higher. Violations of September Blue carry a military courts martial penalty.

October Red

October Red status is granted to files and information deemed of a sensitive nature, open to exploitation by an enemy in non-propaganda or strategic ways, such as details of research on advanced or prototype technologies, information pertaining to pre-human pre-Covenant artefacts discovered and analysed, or theoretical avenues of scientific exploration. Virtually all of the projects overseen by Naval Special Weapons are classified October Red, as well as many projects under the oversight of the Military Intelligence Division and a small number of private sector projects working in tandem with military funding and assistance.

November Black

Main article: November Black

November Black status is granted to material deemed "threatening" to the UNSC, in particular material which contains actions or personnel that could be used by Insurrectionist forces as effective propaganda or by the Covenant to further negate advantages of UNSC tactics, strategies, personnel or materiel. November Black material has traditionally required approval by the UNSC Security Committee, and enforcement of the protocol is absolute, with dedicated enforcement personnel deployed in cases where November Black material could be disclosed. In recent history, however, various unapproved projects have managed to acquire November Black status without knowledge by the Security Committee or other high-ranking UNSC personnel, forcing an expansive internal affairs investigation by ONI.

December White

December White status is granted to material deemed "sensitive" to prevent valuable intelligence from falling into enemy hands that might compromise the security of a colony or other locations within the UNSC's sphere of influence. With the implementation of the Cole Protocol in 2536, most navigational data pertaining to UNSC colonies, military bases or test sites is classified under December White, and enforced by Marine or Navy special warfare teams. Other materials are also classified December White - valuable weapons research or testing material, such as the Algolis military research facility, was routinely destroyed to prevent its capture by the Covenant and study to find UNSC weaknesses. The existence of Project TEMERITY was classified NOVEMBER BLACK to protect it from infiltration, but the technology that it produced was deemed DECEMBER WHITE.