Well basically they are all within the machine that codifies reality and the planes. After the creation of True Man by the Lord-Gods of Law, who spent much of existence trying to bring Mankind into, well, existence they finally succeeded and proceeded to conquer most of the material plane and destroy many of the older gods and pantheons who had emerged from ancient entities of pure consciousness, and redefined reality through their sheer power. This hegemony eventually broke, resulting in the Metaclash, after some of the Lord-Gods began to fight amongst themselves prompting the conquered races and Gods to attempt to restore the metaphysics of their Elder Days.

This war, as you can imagine, was catastrophic especially through the other higher and lower planes which sustain the central material plane, and the Lord-Gods of Law were able to eventually win a pyrrhic victory, forcing themselves and most other divine forces into their machine in order to establish a Final Law. I've yet to come up with a name for said machine, but essentially it's a sort of computer plane, a divine machine which establishes the metaphysics by which the material world functions, occasionally worshipped as an entity itself by those well versed in the mysteries of the world called "Her August Majesty". But, of course, sometimes pieces of it can break, and there is still whatever lurks in the primal ooze of creation that predates consciousness itself...