Health and Safety Code §388.012

The laboratory shall develop at least three alternative methods for achieving a 15 percent greater potential energy savings in residential, commercial, and industrial construction than the potential energy savings of construction that is in minimum compliance with Section 388.003 . The alternative methods: (1) may include both prescriptive and performance-based approaches, such as the approach of the United States Environmental Protection Agency's Energy Star qualified new home labeling program; and (2) must include an estimate of: (A) the implementation costs and energy savings to consumers; and (B) the related emissions reductions.