California Code, Elections Code - ELEC § 301

(1) One or more ballot cards, as defined in Section 302, upon which are printed the names of candidates for each contest and the ballot titles of measures to be voted on by marking the designated area and that are tabulated manually or by optical scanning equipment. The ballot card may include visual graphics and instructions.

(2) An electronic voting system, certified or conditionally approved by the Secretary of State, upon which the names of the candidates for each contest and the ballot titles of measures to be voted on are selected by touching the screen or using other physical controls. The electronic voting system shall print the selections made by the voter, which may be in the form of a list or facsimile of a marked preprinted ballot.