49?!? 49 minor human races mention in official publications and not disallowed for conflict and/or inanity? (I'm thinking specifically of the three throwaway references to minor human races in the Spinward Marches which is a) contrary to a canonical statement in Darrians and b) three really inane descriptions).
So what are you going to do with the canonical limit of 46 minor and three major human races known to the Imperium?
I believe from discussions the 49 Minor/Major human limit has been dropped (written off as an an inaccurate in-game comment by some Imperial scientist).