This bill amends the Energy Conservation and Production Act to remove certain federal building energy efficiency standards. It eliminates previous requirements for new and renovated federal buildings to meet specific energy efficiency benchmarks or fuel restrictions. It ensures that buildings cannot be denied green or high-performance certification solely due to fossil fuel use. It repeals related federal regulations and directs the Secretary of Energy to update regulations within 180 days. The changes give federal agencies more flexibility in building design and operation, especially regarding energy sources, while allowing continued pursuit of green building certifications.