There's a move under way to change the "green" building standards required of any new state buildings, a mandate that falls under an extensive 2005 law now under scrutiny for its large tax breaks.Representatives of the state Public Works Board say they will meet Thursday with Gov. Jim Gibbons to talk about the required certification system, Leadership in Energy and Environmental Design, or LEED, managed by the nonprofit U.S. Green Building Council. They expect to produce a white paper on the topic next week.The PWB representatives say most of LEED's requirements don't provide a payback for taxpayers - a claim …