The 2022 California Building Standards Code (Title 24, California Code of Regulations) is affective as of January 1, 2023. Consult the CBSC site if you need to refer back to the older codes, for any additional supplements or errata, as well as the dates in which they went into effect.
The codes are available for free, in "view only" mode. The list of errata and supplements may not be current on the list below.