Here is the story from Reuters:
CFTC approves rule on protection of customer funds
WASHINGTON | Mon Dec 5, 2011 11:21am EST
(Reuters) - The U.S. futures regulator approved on Monday a rule that puts tighter limits on how brokerage firms can use customer funds, a measure that the now-bankrupt MF Global had encouraged the agency to delay.
The measure was finalized by the Commodity Futures Trading Commission by a 5-0 vote. The rule was initially proposed by the CFTC in October 2010.