Numerous deities and demons are "owners" of planes in the D&D cosmology. My question is for rules sources on the topic how the following questions can be answered:
- How is an entity the legal owner of a plane (like Mystra from Forgotten Realms owns Dweomerheart; Lolth owns the 66th Layer of the Abyss; they both are gods. Pazuzu owns the first layer of the Abyss, but he isn't a god. Lolth apparently didn't own that layer before War of the Spider Queen. What gives, rules-wise?)?
- How can such a claim be contested, or even a plane be "stolen"?
- How can one establish ownership to a "vacant" plane?
The setting is Forgotten Realms, but other 3.x sources are allowed. I am looking for citable rules references.
In the adventure in question I plan on having someone "steal" or "acquire" a plane previously unclaimed (original "owner" has died). Are there rules for that, or do I have to come up with the "I am the DM, I don't explain anything" trick?