Hello everyone !!
GW just released a mini codex for Renegade Imperial Knights.
-Dominus class rules
-Armiger class rules
Ok it's not a full codex but heh it's a start !
note : you get a +6 command points bonus if you take a detachment with 3 knights !
At least it's a start !!
Don't forget to check the FW faq for chaos :