Cal. Educ. Code § 18513

Voting shall be by ballot, without reference to the general election law in regard to form of ballot or manner of voting, except that the words to appear on the ballot shall be “Bonds—Yes” and “Bonds—No.” Persons voting at the bond election shall put a cross (+) upon their ballot with pencil or ink, after the words “Bonds—Yes” or “Bonds—No,” as the case may be, to indicate whether they have voted for or against the issuance of the bonds. The ballot shall be handed by the elector voting to the inspector, who shall then, in his presence, deposit it in the ballot box, and the judges shall enter the elector’s name on the poll list.