The VOIDRUNNER'S CODEX is coming! Explore new worlds, fight oppressive empires, fend off fearsome aliens, and wield deadly psionics with this comprehensive boxed set expansion for 5E and A5E!
Well it is specifically mentioned in the 3.0 DMG, but it was deleted from the 3.5 DMG. At least one designer has admitted that removing the sentence was an editting error, not an intentional change.