; and (ii) in subparagraph (B), by inserting or (4) after paragraph (3) ; (B) in subsection (b)— (i) in paragraph (2)(B), by striking this section and inserting the New Home Energy Efficiency Act ; and (ii) by adding at the end the following: (5) 2018 IECC (A) In general The term 2018 IECC means the 2018 International Energy Conservation Code, as such Code (including supplements) is in effect on the date of the enactment of the New Home Energy Efficiency Act . (B) Special rule For purposes of subsection (c)(1)(B)(i)(I), in determining whether a dwelling unit has been constructed in accordance with the standards of chapter 4 of the 2018 IECC by achieving a level of energy efficiency which meets Section R406.4 (N1106.4) of such Code, such determination shall be made without accounting for on-site energy generation.