The rule book for the Riders Quadrant. It’s a fraction of the length of the other divisions.
See beginning of chapter excerpts from the Codex here.
Article 3, Section 2: “It’s an executable offense to attack any cadet while sleeping” (Yarros 9).
Article 3: “It is unlawful for a rider to cause another harm. While in a quadrant formation or in the supervisory. Presence of a superior-ranking cadet[…] As it will diminish the efficacy of the wing” (Yarros 27).
The Dragon Riders Codex states that squad mates cannot kill each other.
Article 4, Section 3: Squad leaders and wingleaders cannot harm each other without cause.
Fourth Wing: Chapter 11– A rider may only bring to the quadrant the items they can carry, and they shall not be separated from those items no matter what they may be. For once carried across the parapet, they are considered part of their person. (Article Three, Section Six, Addendum B) (Yarros 141)
The Official Empyrean Series Fan Club 