Health & Saf. Code, § 17928

(a) (1) The Department of Housing and Community Development shall, for building standards submitted to the California Building Standards Commission for adoption in the 2010 California Building Code or later, do all the following:

(A) Review relevant green building guidelines as deemed necessary by the department when preparing proposed building standards for submittal.

(B) Consider proposing as mandatory building standards those green building features determined by the department to be cost effective and feasible to promote greener construction.

(2) Nothing in this subdivision shall be construed to supplant or otherwise change the existing process for approval and adoption of building standards through the California Building Standards Commission.

(b) (1) The department shall also summarize both of the following in a triennial report to the Legislature no later than December 31, 2025, and every three years thereafter, which shall be included in the annual report required by Section 50408:

(A) Green building features proposed as building standards during the most recent Triennial and Intervening Building Standards Adoption Cycles, as appropriate.

(B) Green building guidelines reviewed pursuant to subdivision (a) during the most recent Triennial and Intervening Building Standards Adoption Cycles.

(2) For those items required by this subdivision already included in other reports provided to the Legislature or generally available, the department may fulfill this requirement by citing where that information can be found.