потому что в кодексе есть отсылка к арми лист энтри коим гаунт и является, внезапно, ага-ага, это в правилах есть :)
Army List Entries The rules for your Citadel miniatures are found in a wide range of Games Workshop publications, such as codexes, codex supplements and dataslates. Regardless of where this information is found, it is known as an Army List Entry. Each Army List Entry describes a unit of Citadel miniatures and includes everything you will need to know in order to use that unit in a game of Warhammer 40,000. In some older codexes, the information for a single unit’s Army List Entry is spread out amongst different sections of the book. Taken together they describe, and are treated for all rules purposes as, a single Army List Entry. When using such a codex, each unit’s Faction is the same as its codex title. For example, all units in Codex: Space Marines belong to the Space Marines Faction, whilst all units in Codex: Chaos Daemons belong to the Chaos Daemons Faction.