California Statutes § 18560.1 Double voting a misdemeanor

(a) A person who votes or attempts to vote in an election held in this state and in an election held in another state on the same date shall be guilty of a misdemeanor.

(b) This section does not prohibit a voter from voting in an election held in this state and in an election held in another state on the same date if one of the elections is an election in a landowner voting district or any other district for which an elector is not required to be a resident of the district.