Board Thread:Community Decisions/@comment-33255378-20180111111910/@comment-28679215-20180111123309

(1) It's not that Space Marines cannot fight alongside Xenos per se and frequency isn't the problem. It's the scenario surrounding the allegiance. This is why this rule exists.

(2) This is more to stop everyone's Chapters (as well as Chaos Warbands in an indirect sense) being similar to the Black Templars in size. Some fluctuation in size with regards to the limit is assumed due to the nature of recruitment, but all Codex-Compliant Chapter adear to the Codex (duh!) and thus stick to the limit. This is why this rule exists.

(3) The Second Founding was about the splitting of the Legions while all subsequent Foundings involved the creation of Chapters from scratch using the Gene-Seed stockpiles. This rule exists - at least in my mind - because the Loyalist Legions did not have the numbers to allow them "Infinite Capacity" for separation into Chapters (prime example - the Salamanders) while the processes involved in all Foundings after the 2nd  did allow them "Infinite Capacity" for Successor Chapters.

(4) I agree with this - if a Daemon Prince can, then surely a minor God can.

(5) The minute you officially start allowing this, it can get very messy and very complicated very quickly. So I think this rule has meit. With that in mind, there is a way of sorts to "Get Around" this: Give a Chapter the 'Blood Ravens Syndrome'. Don't know what I mean by that? Look up their apparent connection to the Thousand Sons Legion.