Pax Means peace, a treaty that settles a kingdom would  be a Pax.

A treaty between The Gods to settle a Crystal Orb would be a Great Pax.

But a treaty that Settled the Laws of the Flow of Mana (Ethereal, Astral, Heroic, Fantastic, Technic, and Psionic, among the major), is called MetaPax.

Oddly there are several versions, and the contention among the powers to switch areas to another pax. takes place more often than actual war between gods.  many Great and Planetary Paxes have more to do with this competition than actual peace.