Subject to Section 14877.3 of the Water Code, a city, county, or other local agency may adopt, after a public hearing and enactment of an ordinance or resolution, building standards that are more restrictive than the graywater building standards adopted by the Department of Housing and Community Development under Section 17922.12 and published in the California Building Standards Code.
Source:
Section 18941.7, https://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?lawCode=HSC§ionNum=18941.7..