Bases have been moved in the past, so there's obviously no technical limitations of it. There are no rules against it either, it's been just a policy to only move them if a mod change turns them either too advantageous or disadvantageous and harm gameplay either for the owners or for everyone else. There has been exceptions to that policy though, when bases were moved without a mod change occurring, but a recent warning pointed out the arbitrary nature of such decisions.
I too agree that such rule would benefit the community better than the lack of it.