There are a few documents you can find that talk about this place and what others have learned.

[He took out his cerevice and tapped a couple things into it until it brought up a map of the area the Sanctuary was found. This he turned to show Eiji. He seemed to be of the sort that would join in with that group to get out of here.]

This is the best place to go for any information and help that is outside of CERES. As for whether or not that everything here is theirs, I think it mostly is to a point. We're only dependent on them to a point.