Cal. Veh. Code § 21104
No ordinance or resolution proposed to be enacted under Section 21101 or subdivision (d) of Section 21100 is effective as to any highway not under the exclusive jurisdiction of the local authority enacting the same, except that an ordinance or resolution which is submitted to the Department of Transportation by a local legislative body in complete draft form for approval prior to the enactment thereof is effective as to any state highway or part thereof specified in the written approval of the department.
This section does not preclude the application of an ordinance or resolution adopted under Section 21101 or subdivision (d) of Section 21100 to streets maintained by a community services district organized pursuant to Division 3 (commencing with Section 61000) of Title 6 of the Government Code. An ordinance or resolution enacted by a local authority pursuant to subdivision (c) of Section 21101 may impose a fine or penalty of up to one hundred dollars ($100) for a violation of this code.
Ca. Veh. Code § 21104