(a) By December 31, 2026, the state board, in consultation with relevant stakeholders, including, but not limited to, the California Building Standards Commission, the Department of Housing and Community Development, and the State Energy Resources Conservation and Development Commission, shall develop a framework for measuring the average carbon intensity of the materials used in the construction of new buildings, including those for residential uses. (b) The state board shall also develop, by December 31, 2028, a comprehensive strategy for the stateâs building sector to achieve a 40-percent net reduction in greenhouse gas emissions of building materials as soon as possible, but no later than December 31, 2035. The baseline for the 40-percent net reduction shall be established based on an industry average of environmental product declarations reported for the 2026 calendar year, or the most relevant, up-to-date data that is available, as determined by the state board. (c) The framework developed pursuant to subdivision (a) shall include both of the following: (1) A requirement for the submission by an entity undertaking the construction of a project with a minimum size of five new residential units or 10,000 square feet of nonresidential building space of a life-cycle assessment, as defined in the International Organization for Standardization (ISO) 14040 series of standards with a focus on the Product Stage phases (A1-A3), to determine the carbon intensity of the materials used in new residential and nonresidential buildings. (2) A requirement for the submission by the manufacturer of a building material of an Environmental Product Declaration, Type III, as defined by the International Organization for Standardization (ISO) Standard 14025, or similarly robust material life-cycle assessment approaches that have uniform standards in data collection consistent with ISO Standard 14025, industry acceptance, and integrity for construction materials used for the building. The state board shall determine how to proceed in the event that insufficient material life-cycle assessments or Environmental Product Declarations exist, or in the event of significant supply chain issues. (d) The framework developed pursuant to subdivision (a) may include a tracking and reporting mechanism in order to facilitate the reporting of data to the state board on the carbon intensity of buildings, and that would also allow tracking of progress toward the carbon intensity reduction targets set forth in this section. Except for a fee to reimburse the state board for any administrative costs incurred in administering the reporting mechanism, the state board shall not impose any other charges on the participants in the reporting mechanism authorized under this subdivision. (e) Based on the information submitted by an entity undertaking the construction of a covered project pursuant to paragraph (2) of subdivision (i), as well as other relevant information as determined by the state board, the state board shall evaluate the cost impact and feasibility of implementation of the strategy developed pursuant to subdivision (b), for the purpose of developing recommendations for addressing known cost impact and feasibility issues in strategy implementation. This subdivision does not affect the projectâs status as deemed to comply with the applicable target based on the finding made solely by the entity undertaking the construction of a project pursuant to paragraphs (1) and (2) of subdivision (i). (f) As used in this section the following terms have the following meanings: (1) âFeasibility,â in regard to the use of a material, means all of the following: (A) The material is capable of being installed in a successful manner within a reasonable period of time, taking into account economic, environmental, legal, social, and technological factors. (B) The material does not harm the health or safety of those who install the materials or occupy the building. (C) T
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