Code Geass : A News and Fan Community

I don't know if this has anything to do with it, but consider that C.C. is the one who gave Geass to Lelouch and Mao. This, on the one hand, means we know a lot about their Geass and limitations, but I also think it may be a reflection of how powerful C.C. is. The fact that someone else (I'm guessing V.V., but there could of course be some plot twist ahead that I can't foresee) gave the Emperor and Rollo Geass might mean that theirs isn't subject to limitations (making it totally unfair). Similarly, it hasn't been shown that there's a limitation to the Emperor's Geass either, but that could just be because Charles doesn't want to look weak. It is an interesting thought to ponder, though.