Holes dug in the ground belong to the person who started the hole. Holes may be donated to a guild or designated usable by anyone/public, like any other building. Any resources spawned near a hole take on the ownership of the oldest hole within 5 coords of that resource.
This petition original had translations to French and German posted on it at the time. Since polls were about to close when I was transcribing, I had neither the capability nor the time to copy the translations. Sorry.