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In response to concerns raised by members, core LEED users and stakeholders, and in an effort to provide the marketplace a view of the full LEED program experience prior to ballot, the U.S. Green Building Council (USGBC) announced today that it will delay ballot on LEED 2012 until June 1, 2013 (or potentially earlier in 2013 if USGBC members and the market indicate readiness for ballot). Because of this date change, LEED 2012 is being renamed LEED v4.