The "Chess" position of the Society is a clear example of changes things on a whim. It depends on who is running the show. It's OK....It's NOT OK.
It goes back to that question about the 10 commandments...did God make them up? or did God discover them?
If he made them up...then they can change at his discretion (and of course, they did).
If he discovered them...then he is not omniscient (all-knowing)
The Society plays both....they make up rules and then, on a whim, change them.
They "discover" truth, but their truth keeps changing.