From the website of the U.S. Green Building Council (GAHC Steering Committee member):

"The LEED 2012 third public comment period is now open from March 1-20, 2012 which marks the start of the LEED 2012 program delivery process. This third draft of the rating system is focused on providing a globally applicable, simple-to-use, technically advanced system. Members of the public can comment on any substantive changes made since the second public comment period, which ran from August 1 through September 14, 2011. Once the comment period process concludes, LEED 2012 will be balloted in June and launch in November."