(a) Except as provided in subdivision (c), the commission shall receive proposed building standards from state agencies for consideration in an 18-month code adoption cycle. The commission shall develop regulations setting forth the procedures for the 18-month adoption cycle. The regulations shall ensure all of the following:

1. (1) Adequate public participation in the development of building standards prior to submittal to the commission for adoption and approval.
2. (2) Adequate notice, in written form, to the public of the compiled building standards and their justification.
3. (3) Adequate technical review of proposed building standards and accompanying justification by advisory bodies appointed by the commission.
4. (4) Adequate time for review of recommendations by advisory bodies prior to action by the commission.
5. (5) The procedures shall meet the intent of the Administrative Procedure Act (Chapter 3.5 (commencing with Section 11340) of Part 1 of Division 3 of Title 2 of the Government Code) and Section 18930.

(c) Commencing October 1, 2025, to June 1, 2031, inclusive, subdivision (a) shall not apply to any building standards affecting residential units and proposed building standards affecting residential units shall not be considered, approved, or adopted by the commission, unless any of the following conditions are met:

1. (1) The commission deems those changes necessary as emergency standards to protect health and safety.
2. (2) The building standards are amendments by the State Fire Marshal to building standards within the California Wildland-Urban Interface Code (Part 7 of Title 24 of the California Code of Regulations).
3. (3) The building standards are proposed for adoption in relation to standards researched pursuant to Section 13108.5.2.
4. (4) The building standards are proposed for adoption pursuant to Section 17921.9, 17921.11, or 18940.7 of this code, or Section 13558 of the Water Code.
5. (5) The building standards are necessary to ensure the latest editions of the model codes specified in Section 18916 are incorporated into the triennial edition of the California Building Standards Code, along with any necessary and related state amendments supporting or facilitating the incorporation of the model codes.
6. (6) The building standards are necessary to incorporate errata or emergency updates to the national model codes specified in Section 18916, along with any necessary and related state amendments supporting or facilitating the incorporation of errata or emergency updates to the model codes.
7. (7) The building standards under consideration would take effect on or after January 1, 2032.