model that establishes the baseline energy use and predicted energy savings shall be calibrated according to the procedures set forth in sections 3 and 4 of ANSI/BPI Standard BPI–2400–S–2012: Standard Practice for Standardized Qualification of Whole-House Energy Savings Predictions by Calibration to Energy Use History, or an equivalent standard approved by the Secretary for this purpose. (2) Documentation The percent improvement in energy consumption calculated under this section shall be documented through modeling software described in subsection (d)(2). (3) Monitoring The Secretary— (A) shall periodically evaluate the software packages used for determining rebates under this section