User blog comment:Khalael/Canon Policy Discussion 1: Space Marines/@comment-2253300-20131106083600/@comment-4608429-20131106100120

So, put it down to admin/comunity to decide whether the geen-seed is stable enough or not. Also (because it may come up later) is there a chance that the geen-seed of two unstable Chapters (Raven Guard/Blood Angels for example) could stabalise eachother?