California Code, Public Resources Code - PRC § 8813.3

(a) After December 31, 2005, when a survey that uses or establishes a CCS83 value or values is shown on any document, the station or stations to which the CCS83 value or values are referenced and connected and the CCS83 value or values and the published or stated accuracy or accuracies of that reference station or stations shall be shown also on the document.

(b) If a CCS83 survey begins before January 1, 2006, and is not completed by that date, the CCS83 survey may be completed in accordance with Sections 8813 and 8815.4 of this chapter or Sections 8813.1, 8813.2, and 8813.3 of this chapter, at the surveyor's option.  All other applicable provisions of this chapter remain applicable.