I believe we already have a place like that: The Sirius Legal Codex.
It only need to get 'pinned' and eventually reviewed/updated by factions as done Kusari some time ago with the Kusari Codex.
I had no problems with Carzor to update it with the link.
I also believe there is no need for faction rules if intended as internal regulations to be explained there.
Such informations can be easily obtained from factions status posts and/or recruitment threads, and the factions quick reference guide made by AC Merc (which btw needs a big update) comes handy for this purpose.