Cal. Elec. Code § 21553

A commission member shall be ineligible for a period of five years beginning from the date of appointment to hold elective public office at the federal, state, county, or city level in this state. A commission member shall be ineligible for a period of three years beginning from the date of appointment to hold appointive federal, state, or local public office, to serve as paid staff for, or as a paid consultant to, the Board of Equalization, the Congress, the Legislature, or any individual legislator, or to register as a federal, state, or local lobbyist in this state.