(1) There is hereby created the state building code. The Legislature hereby adopts by reference:
(a) The International Building Code (IBC), chapter 13 of the 2018 edition, and all but such chapter of the 2018 edition, published by the International Code Council, except that (i) section 305.2.3 applies to a facility having twelve or fewer children and (ii) section 310.4.1 applies to a care facility for twelve or fewer persons;
(b) The International Residential Code (IRC), chapter 11 of the 2018 edition, and all but such chapter of the 2018 edition except section R313, published by the International Code Council; and
(c) The International Existing Building Code, 2018 edition, published by the International Code Council.
(2) The codes adopted by reference in subsection (1) of this section and the minimum standards for radon resistant new construction adopted under section 76-3504 shall constitute the state building code except as amended pursuant to the Building Construction Act or as otherwise authorized by state law.