From Dani Rodrik's blog:

The finance ministers of the world's richest countries want to set up rules to govern the investments of sovereign wealth funds from developing and emerging nations. I wonder if they also intend to apply the rules retroactively to entities such as these.

Looks like some countries are afraid of China's forex reserves and Russia's petrodollars, eh? Really makes the U.S. and EU look petulant, but that's nothing new.