(a) Single-family residential construction. Effective September 1, 2016, the energy efficiency chapter of the International Residential Code, as it existed on May 1, 2015, and as supplemented by Health and Safety Code, §388.003(i) and (j), is adopted as the energy code in this state for single-family residential construction as it is defined in Health and Safety Code, §388.002(12).
(b) All other residential, commercial, and industrial construction. Effective November 1, 2016, the International Energy Conservation Code, as it existed on May 1, 2015, is adopted as the energy code for use in this state for all residential, commercial, and industrial construction that is not single-family residential construction under subsection (a) of this section.

Source Note: The provisions of this §19.53 adopted to be effective April 1, 2011, 35 TexReg 4727; amended to be effective January 5, 2016, 41 TexReg 269