to facilities the construction of which begins after December 31, 2020. 206. Renewal of qualifying advanced energy project credit (a) In general Section 48C(d)(2)(A) of the Internal Revenue Code of 1986 is amended by striking during the 2-year period beginning on the date the Secretary establishes the program under paragraph (1) . (b) Effective date The amendment made by this section shall apply to applications received after the date of the enactment of this Act. 207. Performance-based tax credits for commercial and residential buildings (a) The Internal Revenue Code of 1986 is amended by inserting the following after section 45U (as added by this Act): 45V. Deep energy retrofits and zero-energy commercial and residential buildings (a) Definitions In this section: (1) Btu The term Btu means British Thermal Unit. (2) Building energy The term building energy means energy consumed at the building site as measured at the site boundary, which includes heating, cooling, ventilation, domestic hot water, indoor and outdoor lighting, plug loads, process energy, elevators and conveying systems, and intrabuilding transportation systems. (3) Deep energy retrofit The term deep energy retrofit means a project that uses energy efficiency measures and renewable energy resources to reduce the energy use of an existing building by at least 50 percent on an annual basis relative to the most recent 12-month period in which the building was fully occupied prior to the project, provided that energy efficiency measures must account for at least 80 percent of the reduction in energy use. (4) Delivered energy The term delivered energy means any type of energy that could be bought or sold as building energy, including electricity, steam, hot or chilled water, natural gas, biogas, landfill gas, coal, coke, propane, petroleum and its derivatives, residual fuel oil, alcohol-based fuels, wood, biomass, and any other material consumed as fuel. (5) Exported energy The term exported energy means on-site renewable energy supplied through the