2019 California Standards for Accessible Design Guide (effective January 1, 2020 with July 1, 2021 amendments)

1.1.10 Availability of codes.

At least one complete copy each of Titles 8, 19, 20, 24, and 25 with all revisions shall be maintained in the office of the building official responsible for the administration and enforcement of this code. Each state department concerned and each city, county or city and county shall have an up-to-date copy of the code available for public inspection, See Health and Safety Code Section 18942(e)(1) and (2).