California Code, Government Code - GOV § 85702.5

(a) A county or city may, by ordinance or resolution, impose a limit on contributions to a candidate for elective county or city office that is different from the limit set forth in subdivision (d) of Section 85301.  The limitation may also be imposed by means of a county or city initiative measure.

(b) A county or city that establishes a contribution limit pursuant to subdivision (a) may adopt enforcement standards for a violation of that limit, which may include administrative, civil, or criminal penalties.

(c) The Commission is not responsible for the administration or enforcement of a contribution limit adopted pursuant to subdivision (a).

(d) This section shall become operative on January 1, 2021.  A county or city's limit on contributions to a candidate for elective county or city office that is in effect on the operative date of this section shall be deemed to be a limit imposed pursuant to subdivision (a).