The committees have been anticipating these changes for a long time, after the decision with LEED 2009 to minimize technical changes and focus on the reorganization and weighting of the credit structure. As a result, the credit requirement changes in the proposed LEED v4 rating system are the most extensive in LEED’s twelve-year history.
The new announcement comes just a few weeks after USGBC had tried, with limited success, to allay these concerns by postponing the planned ballot from May 2012 to August and by promising to keep LEED 2009 available to project teams for at least six months after the introduction of LEED v4. At that time, USGBC had also announced plans for a “beta test” of the new rating system, but critics had questioned how such a test would be useful if the changes it purported to test were already locked in by member ballot.
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