; (iii) equipment and skilled workforce availability; (iv) technology and market readiness levels of low-emissions cement, concrete, asphalt binder, and asphalt mixture technologies; (v) the regulatory and specification landscape; and (vi) any other factor, as determined by the Secretary. (2) Conforming low-emissions cement, concrete, asphalt binder, or asphalt mixtures for Department of Transportation advance purchase commitments The Secretary shall establish or update, as applicable, a reasonable but ambitious threshold, expressed as a percentage-based delta relative to the current baseline embodied greenhouse gas emissions, for purposes of defining conforming low-emissions cement, concrete, asphalt binder, or asphalt mixtures under section 6(b)(2) of the Concrete and Asphalt Innovation Act of 2023 , which shall be reassessed not less frequently than once every 2 years. (3) Consultation In carrying out this subsection, the Secretary shall consult with the following stakeholders, who shall reflect regional diversity to the maximum extent practicable: (A) Entities in the cement, concrete, asphalt binder, and asphalt mixture sectors, including— (i) ready-mix or site-mixed concrete producers; (ii) precast concrete producers; (iii) portland cement (as defined in section 2 of the Concrete and Asphalt Innovation Act of 2023 ) and other cement producers; (iv) aggregate producers; (v) asphalt binder producers; (vi) asphalt mixture producers; (vii) producers of emerging cement, concrete, asphalt binder, or asphalt mixture solutions