Editing MidHammer 40,000: SM Chapters (section)

===Composition of The Codex Astartes===
The Codex Astartes in total is a mighty lengthy Collection of Tomes. The Entire "Codex" takes up several bookshelves. Very few chapters have entire collections of the work and even fewer have read it in its entirety. So much so that their is an entire organization in Ultramar called the "Legatus Codices" (Codex Lawyers) who specialize in advising chapters on applying the codex as well as mediating chapter disputes. 

The actual name for the Codex Astartes is: ''Illisimus Corpus Codices et Lectitiae et Tactici et Regulae pro Legio Imperii Paci Velloque'' or "The Great Body of Codes, Laws, Tactics, and Regulations for The Imperium's Legions during Peace and War."

Most chapters carry an abridged version of the codex, containing the relevant sections and indexes and regulae for their chapter's mission statement. Individual Astartes often have an even further abridged version, which mostly contains the sections relating to the individual behavior of a Space Marine. Each Abridged version of the Codex becomes its own book, as each abriged codex usually consists of pages worth of commentary and notes by the leaders of the chapter.

====Codex Sections====
The Corpus is divided into 4 parts.
;Codex Velladucti
:"The Book of War-waging"
:*The Book of Tactics and Generalship. This section consists mostly of the Work of Roboute Gulliman, but also features notable sections from Horus. Magnus, Fulgrim, and Khan also have made some contributions.
:*Contains guidelines for proper military tactics, effective strategies, guidelines on management of supplylines, and other things that would be useful guidelines for a chapter or company to use the codex astartes.
:*Includes advice and strategic guidelines for Joint Chapter and Joint Legion missions, as well as guidelines on Utilizing Imperial Gaurd divisions in joint missions.
:*It also includes analysis of major battles of the Great Crusade, with commentaries by the Primarchs who led them.
;Codex Chronopacis
:"The Book of Peace-Time"
:*Provides Guidelines for managing the chapter when a Space Marine Chapter and legion is not at war. 
:*It offers advise on training schedules, fortress maintenance, managing Astarte morale and discipline, and other chapter management.
:*Codex Chronopacis is probably one of the Few Sections in which Vulkan makes hefty contributions on advising Astartes-Civilian relations, and the ways in which the space marine legion can contribute to the well-being of their subjects.
;Codex Astartes
:"The Book of The Soldier"
:*Perhaps the most famous book, and the one that nearly every Space Marine has read.
::*So much so, that This particular Section has become a Metonym for the entire Corpus, despite being the smallest section.
:*The Codex Astartes contains rules and guidelines for the behavior of the Adeptus Astartes on a personal level. 
:*Behavior towards superiors, subordinates, Astartes of different chapters, as well as with Military and civilians are all covered here.
:*The Codex Astartes also provides guidelines on warding oneself against the forces of chaos and identifying signs of corruption.
::*This section was written primarily by Magnus the Red. However Leman Russ has some rather impassioned contributions as well.
;Appendix Astartes
:*Contains rules and guidelines for the creation of new Space Marine Chapters
:*The Different Indexes and Regulae are located here.

;Codex Regulae (Apochryphal)
:The "Standard Code" or "The Code of The Legions"
*An additional Section composed by Horus 
*Dismissively called "Codex Nebulae" (The Wishy-Washy or Irrelevant Code), by Astartes Chapters and most Jura Codice. 
*Codex Regulae offers advice on the management of legions.
*However, because most Legions are still led by their Primarch (who usually have their own ideas), the Codex is for the most part ignored.
*Very few Legions or Chapters include this in their codexes.

The "Codex Astartes" as usually carried by individual space marines usually consists of:
# Major selections from "The Codex Astartes"
# Heavily curated selections from Codex Chronopacis regarding individual behavior and dispute management
:Selections usually selected based on the Position of the Astartes as well as the Chapter Master's preference.
# Heavily curated selections from Codex Velladucti
:Usually selected based on the leadership of the chapter based on tactical preferences.
#The Relevent Index and Regulae pertaining to the chapter.

====Rules for Post First Founding Chapters====
The Codex provides the provisions under which a group of Astartes can apply for "Chaptership." Should an aspiring chapter-master wish to create an independent chapter, he must meet the following provisions:
*Permission from your Primarch (or Legionary Commander)
*Sponsorship from at least 10 other Chapter Masters,
*Endorsement of good character by no less than three of your fellow legionaries of equal or greater status,
*An endorsement of gene-seed health by the Ordo Biologius.
*Have strength of no less than 150 Astartes, but no greater than 500
*Among these 150, no less than 10 Librarians and 10 Apothecaries
*Other requirements based on the Index upon which your chapter is founded under (those founded under Regula Magnus for instance, have additional regulations placed on Psykers)

If all 6 of these provisions are met, then the Rules and Chapter can be approved by a Majority of The High Lords of Terra and the Approval of 3 Ultramar Princes (Emperor can Veto) If any of these provisions are lacking, then either the Emperor's approval or a Unanimous Vote of The High Lords is required.
====Index Astartes and Regula Astartes====
While Gulliman and Khan wrote the entire book together, they also provided their own sections or "indexes" that they wrote independently. An applying chapter must apply to be under one of these rules, and will be subject to the regulations of the chapter they are headed under. Sections are Numbered in order of their creation.

Additionally, there are certain "sub indexes" or Regulae, which while not significant enough in their divergence to be considered its own chapter, provides additional rules for further specialization of space marine chapters.
<!--We can move the numbers around if other people have ideas for sections--->
=====Section 1 - Index Aurellian or "The Rule of Gulliman=====
;Date Enacted
:M31
;Author
:Roboute Gulliman (Posthumously)
:Vulkan (contributed and Edited)
:Jaghatai Khan (Edited and Compiled)
;Focus
:Planetary Administration, well-rounded chapters,
;Fleet Based or Fortress Monastery
:Fortress Monastery
;Special Characteristics
:Attempts to embody Gulliman's vision for the Astartes as statesmen
Index Aurellian requires provisions relating to planetary administration. Those under the Rule of Gulliman are expected to live up to Gulliman's vision of Statesmen Astartes and have mastery of the diplomatic and administrative arts as well as military matters. Index Gulliman also has additional requirements regarding Chapter Composition and Fortress Monasteries.
======Section 1(a) Regula Collegii (Ecclesiarchic Rule)======
;Date Enacted
:M30
;Author
:St Avilla of Bergenvan
;Focus
:ecclesiastic duties, religious and spiritual warfare, ceremonial duties
;Fleet Based or Fortress Monestary
:Fortress monastery (with some exceptions).
;Special Characteristics
:Heavily restricted on use of weapons, equipment, and tactics
:Does not answer to the [[MidHammer_40,000:_Government#Lord_Gulliman|Lord Gulliman]], instead answering to Answers to [[MidHammer_40,000:_Government#Tribune_of_The_Faithful|Tribune de Fey]]
:High Lords of Terra and Royum Ultramari are mandated by treaty to jointly oversee chapter
:Almost Exclusively Ultramarines (some exceptions)
Unique to the Aurelian cult, these are approved rules mandated for Astartes chapters under the direct control of the Aurelian Cult and Royum Ultramar (not to be confused with Ultramarine successors within the Imperium that ''follow'' the Aurelian Cult). The Chapters under this regula are very strict in terms of armaments, organizational structure, and restrictions. Most notably Regula Collegii chapters are restricted from major changes or adaptations in technology, resulting in most Ecclesiarchic chapters to continue to use their meticulously maintained Mark 2 Armor.

======Section 1(b) Regula Viatorris (Rule of The Webway)======
;Date Enacted
:M32
;Author
:Jaghatai Khan
:in Consultation with the Craftworld Leaders and Farseers
;Focus
:Cooperation with Eldar, use of Web Way
;Fleet Based or Fortress Monastery
:Fleet Based
;Special Characteristics
:*Most Bureaucratically weighted chapter
:*Permitted to travel the webway
:*Under intense scrutiny by Eldar
A work of headache inducing compromise, and endless negotiations between Jaghatai Khan, Magnus, and The Representatives of Craft World Biel-Tan. Astartes founded under this codex were the first Space Marines to be permitted to operate in the Webway, and as such shoulder their crippling regulations with pride and distinction. In addition to stringent regulations regarding chapter organization, organizational hierarchy, and restricted activities, chapters in the Rule of The Webway must also accept the sponsorship of an individual craftworld, and are required to answer to them regarding activities in the web way.
======Section 1(c) Regula Prosperae (Rule of Magnus)======
;Date Enacted
:M32
;Author
:Magnus The Red
;Focus
:Librarians, conflict with warp-based threats
;Differences from Index
:*Greater emphasis on protecting and fostering psyker communities
:*Assumes chapter is exclusively or majority psychic
;Special Characteristics
Heavily Modified variation of Index Aurelian, the Regula Magni adds additional qualifications for Librarians, and tactics for Librarian heavy combat.
======Section 1(d) Regula Angeli (Rule of The Angel)======
<!--im not sure if this should be Index Aurelian or Index Phoenecian, still deciding-->
;Date Enacted
:M37
;Author
:Sanguinius (in consultation)
<!--In keeping with Sanguinius' general disinterest in administration (seen from imperium secundus, and MidHammer's positioning him as the Emperor's Fury), i think it would make more sense if Sanguinius fostered one of his son's interest in forming chapters, rather than making it himself. They are the one's who want to do it, its not daddy's job to handhold you-->
:Thalastian Jorus
;Focus
:Squadron based tactics, loyalty among brothers, personal improvement, jump-pack combat
;Differences from Index
:*Is looser with Gulliman/Vulkan's emphasis on administration and civilian affairs, 
:*borrows heavily from Index Phoenecian in its aspiration for personal development.
:*Has stipulations for managing the Red Thirst
;Special Characteristics
Created by Sanguinius following successful development of Treatments for the Red Thirst. This section finally permitted The Blood Angels to form free Chapters.
=====Section 2 - Index Chorgoris or "The Rule of Khan"=====
;Date Enacted
:M30
;Author
:Jaghatai Khan
;Focus
:Migratory Chapters, flexibility, combined arms combat
;Fleet Based or Fortress Monestary
:Fleet Based
;Special Characteristics

Index Chorgoris provides guidelines on nomadic or spaceborne chapters. It is less interested in composition and focuses more on clear lines of succession, Chivalric rules regarding behavior between fellow astartes and non-astartes, and managing Intra-chapter disputes. The Rule of Khan is considered to be less stringent on the Chapter as a whole, but places more of the rules and liability on individual Astartes.
Eventually Other Primarchs (with the permission of Khan/Ultramarines Chaptermaster) added their own Indexes (Shown in order of their creation)
======Section 2(a) Regula Mortis (Rule of Garro)======
;Date Enacted
;Author
;Focus
;Differences from Index
;Special Characteristics
Special section of rules for loyalist sons of traitor legions. Mostly follows Index Chorgoris, but with guidelines pertaining to managing a Chapter composed of multiple Genefathers, as well as additional rules for safegaurding against corruption.
======Section 2(b) Regula Melanautis (Second Rule of Magnus or The Rule of The Warp)======
;Date Enacted
;Author
;Focus
;Differences from Index
;Special Characteristics
Created to help in the creation of chapters who operate near the Eye of Terror, and as such have more encounters with Warp Storms and Demonic incursions.
In addition to regula prosperae, which was designed for sedentary chapters, Magnus composed a variation for The Khan's nomadic chapters. Given that the Khan already has multiple stipulations for the proper guidelines for librarius, Magnus' rule is mostly about additional tactics for Librarians as well as rituals and lifestyle precautions for Marines that spend so much time in the Warp.

======Section 2(c) Regula Skythiae (Rule of The Nomad)======
;Date Enacted
:M40
;Author
:Jaghatai Khan (with consultation from the Oligarchs of Commoragh)
;Focus
:Use of Webway, rapid deployment
;Differences from Index
:Greater emphasis on Commerce and diplomacy with Dark Eldar
;Special Characteristics
:Provisions for using web way for rapid action deployment.
The Millennium long ambition of the Khan realized through the benignly negligent sponsorship of Commoragh (who were concerned about the rise of Yndarria and the Radical Cult of Ynnead). Created in M40, the Rule of The Nomad offers significantly more flexibility than the bureaucratically asphyxiated Regula Viatorres Astartes. In exchange for limitations on operations in the webway, they have greater flexibility travelling through the webway, making these Astartes chapters the ultimate force for rapid response and deployment throughout the Imperium with little Eldar interference.

=====Section 3 - Index Penitentiae=====
;Date Enacted
:M30
;Author
:Jaghatai Khan
:Constantine Valdor
:High Lords of Terra Consultation
;Focus
:Rehabilitating Traitor Astartes, problematic traitor legion loyalists.
;Fleet Based or Fortress Monastery
:Fleet Based
;Special Characteristics
:*Restricted from replenishing numbers
:*Heavily monitored by High Lords
:*Very regimented and regulated behavior
Index Penetentiae was created for heretical or disloyal legions to prove their loyalty to the Imperium. Unlike the other sections, which offer significant flexibility in terms of the legions organization and mission, the Index Penitentiae provides the legion's structure, which must by strictly adhered to. Those under the Index Penitentiae must submit to regular investigations by the Imperial Inquisition. Penitent legions are also not permitted near forgeworlds, hive worlds or The Solar Segmentum unless invited. Those under Index Penitentiae are not permitted to expand their numbers until such time that they are considered worthy. Some may be forced to remain under The Rule of The Penitent until their legion is extinguished. Many of the first to use this index were the many Traitor Legion Loyalist Chapters in the Aftermath of The great treachery.
=====Section 4 - Index Phoenician or "The Rule of Fulgrim"=====
;Date Enacted
:M33
;Author
:Fulgrim
;Focus
:*Personal Perfection
:*Artificing and Artistry
:*Individualism
;Fleet Based or Fortress Monastery
:Stipulations for Both
;Special Characteristics
:*Very loose structure to encourage creative composition.
Fulgrim's Rule places additional requirements on Artificers and Apothecaries. Astartes under the Rule of Fulgrim are also expected to be masters of Personal Combat. Those under Fulgrim's rule are expected to be both expert fighters and expert craftsmen. Curiously there are no Emperor's Children Successor chapters under the "Fulgrim's Rule." Due to the weakness of The Emperor's Children, they could never afford to donate. Instead the followers of The Rule of Fulgrim are almost exclusively Iron Hands Successor Chapters. Index Phoenician was written by Fulgrim at the personal request of Ferrus Manus, who had several companies request their Genefather's permission to form Chapters.
======Section 4(a) Regula Tyrranis (The Rule of Tyrannids)======
;Date Enacted
:M35
;Author
:The Commission of The High Lords of Terra regarding the Tyrannid Threat (ie Council of Ophelia)
;Focus
:Tyrannids
;Differences from Index
:Discards much of the emphasis on artisitic merit over adaptablility. Borrows heavily from Index Praetorian.
;Special Characteristics
For Tyranid-busting chapters, augments Index Phoenecian with its emphasis on personal adaptability, with Dorn's experience and resilience enshrined in Index Praetorean.
Exceptional at adapting to an ever adapting foe.
=====Section 5 - Index Praetorian: or "The Rule of Dorn"=====
;Date Enacted
:M33
;Author
:Rogal Dorn
;Focus
:Hardiness, Fortification, Security, Threat perception and Neutralization
;Fleet Based or Fortress Monastery
:Technically doesn't specify but emphasis clearly favors fortress monastaries.
;Special Characteristics
:Infamous for Blunt, frank language. Places emphasis on training regiment to build resilience to pain and mental pressure.
The Rule of Dorn has a few stipulations for personal behavior or for chapter management. The ultimate focus of Index Praetorian is Seigecraft and Engineering. A chapter under Index Praetorian is rigorously disciplined in the arts of engineering, warfare, architecture, and defensive tactics. Created by Rogal Dorn at the pleading of his loyal sons who, unlike Sigismund, wanted to remain true to his teachings even after the Imperial Fists were dissolved.

=====Section 5(a) Regula Extrodinarii (Rule of the Emergency) (Redacted)=====
;Date Enacted
:M36
;Author
:Lord Gulliman Justinian Vendee
;Focus
:Unorthodox methods, diversity of tactics.
;Differences from Index
:Tosses aside most, if not all of Rogal Dorn's few stipulations on personal character.
;Special Characteristics
Produced almost as many Chaos Regiments as Lorgar. Unorthodox and cruel chapters accelerated T'au-Imperium Conflict.
The now Infamous Regula Extrodinarii took an Index already light on Personal behavior and moral dictums and made it even more loose. The index was created by the High Lords of Terra in an effort to create more Legions to defend the Ultima Segmentum from the T'au. The result were the dregs from each legion escaping their Primarch's discipline to become free companies in the lightly governed frontier.