Cal. ELEC § 14300

(a) In the case of an election for a state or federal office, each polling place using a direct recording electronic voting system, as defined by Section 19271, the elections official shall provide paper ballots equivalent to the following percentages:

(1) For a statewide general election, no less than 10 percent of the registered voters in the polling place.

(2) For a statewide direct primary election, for each partisan ballot form for which at least 10 percent of the registered voters in the polling place are eligible to request, no less than 5 percent of the registered voters in the precinct eligible to request that ballot form at the polling place. For nonpartisan voters, the total number of paper ballots among all ballot forms that they are eligible to request shall be no less than 5 percent of registered nonpartisan voters at the polling place.

(3) For any other state or federal election contest, no less than 5 percent of registered voters at the polling place.

(4) For purposes of this section, the number of registered voters shall be based on the registration on the 88th day prior to the day of the election.

(b) The elections official shall establish procedures for the use of the paper ballots described in this section in the event the direct recording electronic voting system becomes nonfunctional.

(c) Upon request, the precinct board shall provide a paper ballot to a voter, regardless of the availability of the direct recording electronic voting system, as long as supplies remain available.

(d) The paper ballots described in this section may consist of provisional ballots.

(e) Any vote cast on a provisional ballot subject to this section by an otherwise qualified voter shall be counted as a regular ballot and shall not be subject to the requirements of Section 14310.

(f) In elections conducted using voter centers, the elections official shall provide a sufficient amount of ballot stock to be used for printing ballots in each vote center.