From the U.S Green Building Council:

“Washington, D.C. (March 28, 2012) – The 2012 International Green Construction Code (IgCC), released today, will increase the energy-efficiency of structures, while providing governments direction and oversight of green design and construction, according to the International Code Council (ICC) the code’s author and one of several U.S. Green Building Council (USGBC) partners in the effort.”

For more information, read the full USGBC Press Release.