When will it be allowed to race using just "electricity"?

[zeno]

I don't really get this whole list thing.
Which battery is legal to race with? What size and so on?

Finally lipos are getting acceptable but you still have to stick to the ones that are legal according to some list.

Why not just drop it and let people race on whatever batteries they choose??
Be it NiMh, LiPo, LiFe hell even Pb!