This Notice provides guidance concerning qualified energy conservation bonds under § 54D of the Internal Revenue Code (Qualified Energy Conservation Bonds). This Notice addresses questions regarding qualified conservation purposes eligible for financing with these bonds, particularly (1) how to measure reductions of energy consumption in publicly-owned buildings by at least 20 percent under § 54D(f)(1)(A)(i) and (2) what constitutes a “green community program” under § 54D(f)(1)(A)(ii).