Cal. Health & Safety Code § 19310
(a) This chapter applies to all of the following structures, as defined in Chapter 3 of the California Building Code (Part 2 of Title 24 of the California Code of Regulations), that are constructed on or after January 1, 2023, or are constructed prior to January 1, 2023, and modified, renovated, or tenant improved, as described in subdivision (b), subsequent to that date:
(b) A structure shall be considered modified, renovated, or tenant improved for purposes of subdivision (a) if the structure is subject to any of the following on or after January 1, 2024:
(c)
(d)
(e) In order to ensure public safety, the person or entity responsible for managing the building, facility, and tenants of any structure described in subdivision (a) or (b) that is an occupied structure shall do all of the following: