The 2019 California Building Standards Code (Title 24, California Code of Regulations) were published in July 2019 with an effective date of January 1, 2020. Consult the CBSC site if you need to refer back to the 2016 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.
