Cal. Pub. Res. Code § 8815

The use of the term “California Coordinate System” on any map or document or in any field notes shall be suffixed either with “27” (shown as “CCS27”) for coordinates based on NAD27, with “83” (shown as “CCS83”) for coordinates based on NAD83, and with “2022” (shown as CCS2022) for coordinates based upon NATRF2022 or PATRF2022.